TY  - CONF
AU  - Brat, Zagorka
AU  - Janković, Bojan
AU  - Stojiljković, Dragoslava
AU  - Vujanović, Milan
AU  - Wang, Xuebin
AU  - Manić, Nebojša
PY  - 2023
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/7240
AB  - The pyrolysis process of two low-rank coals (lignite Kostolac and Kolubara), and two waste
materials (spent coffee ground and tyre rubber granulate) as well as their blends, have been
examined by preliminary thermogravimetric analysis. Thermal decomposition experiments were
performed in an N2 atmosphere on raw (pyrolysis) and blend (co-pyrolysis) samples at heating
rates of 10, 15, and 20 K min-1. The lignite-waste blend was created in the following mass
percentage ratios 90:10, 80:20, and 70:30. Based on obtained experimental data, the strong
interactions were identified between the examined lignite and waste materials during copyrolysis,
indicating the presence of a positive synergistic effect. The characteristics of the raw
waste sample and the heating rate were recognized as two key parameters that influenced the
synergy result with lignite sample, in lignite-spent coffee ground blends. For lignite-waste rubber
granulate blends, the blending ratio is critical for beneficial synergistic effect (ratios of waste
rubber granulate with lignite less than 30% are preferred). The probable synergistic mechanisms
were further explained using performed kinetic analysis by varying the effective activation energy
with temperature and conversion. In addition, the influence of micro-scale condition
characteristics such as heating rate (as the experimental regulatory factor) on the magnitude
response of synergistic effect during co-pyrolysis was also investigated in this work.
PB  - SDEWES - International Centre for Sustainable Development of Energy, Water and Environment Systems
PB  - Faculty of Mechanical Engineering and Naval Architecture, Zagreb
C3  - Book of Abstracts 18th Confenrece on Sustainable Development of Energy, Water and Environment Systems
T1  - Co-Pyrolysis Process of Coal and Waste: Synergistic Effect and Influence of Microscale Conditions
IS  - SDEWES2023.0507
UR  - https://hdl.handle.net/21.15107/rcub_machinery_7240
ER  - 

@conference{
author = "Brat, Zagorka and Janković, Bojan and Stojiljković, Dragoslava and Vujanović, Milan and Wang, Xuebin and Manić, Nebojša",
year = "2023",
abstract = "The pyrolysis process of two low-rank coals (lignite Kostolac and Kolubara), and two waste
materials (spent coffee ground and tyre rubber granulate) as well as their blends, have been
examined by preliminary thermogravimetric analysis. Thermal decomposition experiments were
performed in an N2 atmosphere on raw (pyrolysis) and blend (co-pyrolysis) samples at heating
rates of 10, 15, and 20 K min-1. The lignite-waste blend was created in the following mass
percentage ratios 90:10, 80:20, and 70:30. Based on obtained experimental data, the strong
interactions were identified between the examined lignite and waste materials during copyrolysis,
indicating the presence of a positive synergistic effect. The characteristics of the raw
waste sample and the heating rate were recognized as two key parameters that influenced the
synergy result with lignite sample, in lignite-spent coffee ground blends. For lignite-waste rubber
granulate blends, the blending ratio is critical for beneficial synergistic effect (ratios of waste
rubber granulate with lignite less than 30% are preferred). The probable synergistic mechanisms
were further explained using performed kinetic analysis by varying the effective activation energy
with temperature and conversion. In addition, the influence of micro-scale condition
characteristics such as heating rate (as the experimental regulatory factor) on the magnitude
response of synergistic effect during co-pyrolysis was also investigated in this work.",
publisher = "SDEWES - International Centre for Sustainable Development of Energy, Water and Environment Systems, Faculty of Mechanical Engineering and Naval Architecture, Zagreb",
journal = "Book of Abstracts 18th Confenrece on Sustainable Development of Energy, Water and Environment Systems",
title = "Co-Pyrolysis Process of Coal and Waste: Synergistic Effect and Influence of Microscale Conditions",
number = "SDEWES2023.0507",
url = "https://hdl.handle.net/21.15107/rcub_machinery_7240"
}

Brat, Z., Janković, B., Stojiljković, D., Vujanović, M., Wang, X.,& Manić, N.. (2023). Co-Pyrolysis Process of Coal and Waste: Synergistic Effect and Influence of Microscale Conditions. in Book of Abstracts 18th Confenrece on Sustainable Development of Energy, Water and Environment Systems
SDEWES - International Centre for Sustainable Development of Energy, Water and Environment Systems.(SDEWES2023.0507).
https://hdl.handle.net/21.15107/rcub_machinery_7240

Brat Z, Janković B, Stojiljković D, Vujanović M, Wang X, Manić N. Co-Pyrolysis Process of Coal and Waste: Synergistic Effect and Influence of Microscale Conditions. in Book of Abstracts 18th Confenrece on Sustainable Development of Energy, Water and Environment Systems. 2023;(SDEWES2023.0507).
https://hdl.handle.net/21.15107/rcub_machinery_7240 .

Brat, Zagorka, Janković, Bojan, Stojiljković, Dragoslava, Vujanović, Milan, Wang, Xuebin, Manić, Nebojša, "Co-Pyrolysis Process of Coal and Waste: Synergistic Effect and Influence of Microscale Conditions" in Book of Abstracts 18th Confenrece on Sustainable Development of Energy, Water and Environment Systems, no. SDEWES2023.0507 (2023),
https://hdl.handle.net/21.15107/rcub_machinery_7240 .

TY  - JOUR
AU  - Janković, Bojan
AU  - Manić, Nebojša
AU  - Perović, Ivana
AU  - Vujković, Milica
AU  - Zdolšek, Nikola
PY  - 2023
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/4422
AB  - In recent years, deep eutectic solvents (DESs) have attracted considerable attention, and they have been applied in many fields, such as dissolution and separation, electrochemistry, materials preparation, reaction, and catalysis. In this paper, a detailed thermal decomposition mechanism of DES-type II (consisting choline chloride (ChCl) and magnesium chloride hexahydrate (MgCl2·6H2O) in a molar ratio 2:1 (MgCl2·6H2O-[Ch]Cl)) was explained, using thermal analysis techniques. Physicochemical clarification of overall thermal decomposition mechanism and the influence of enthalpy–entropy compensation (EEC) on reactions mechanism emerging are presented for the first time, in favor of this DES type. In the kinetic analysis of the decomposition process, two approaches were used: model-free (inverse) and model-based (direct) methods. It was found that thermodynamic principles in the form of EEC are the source of kinetic compensation effect (KCE) during MgCl2·6H2O-[Ch]Cl thermal decomposition, as a consequence of the effects of molecular interactions. Key phenomenon in the complex multiple step process represents a parallel dehydration steps of MgCl2·6H2O in DES, leading to formation of intermediates, such as [MgCl1(H2O)5]1+ and [MgCl2(H2O)4]. It was established that formation of final products (Mg(OH)2 and MgOHCl) requires a higher expenditure of energy to overcome a high potential barrier, where reaction system compensates this energy via hydrogen bonding disruption. This was confirmed by the identification of a specific ‘oscillator’, flagged as Hsingle bondOsingle bondH···Cl hydrogen bond donating system of the energy (“heat bath”). All kinetic parameters and mechanisms of individual reaction steps were confirmed by numerical optimization of the process and modulated dynamic predictions.
PB  - Elsevier
T2  - Journal of Molecular Liquids
T1  - Thermal decomposition kinetics of deep eutectic solvent (DES) based on choline chloride and magnesium chloride hexahydrate: New details on the reaction mechanism and enthalpy–entropy compensation (EEC)
EP  - M21~
SP  - 121274
VL  - 374
DO  - 10.1016/j.molliq.2023.121274
ER  - 

@article{
author = "Janković, Bojan and Manić, Nebojša and Perović, Ivana and Vujković, Milica and Zdolšek, Nikola",
year = "2023",
abstract = "In recent years, deep eutectic solvents (DESs) have attracted considerable attention, and they have been applied in many fields, such as dissolution and separation, electrochemistry, materials preparation, reaction, and catalysis. In this paper, a detailed thermal decomposition mechanism of DES-type II (consisting choline chloride (ChCl) and magnesium chloride hexahydrate (MgCl2·6H2O) in a molar ratio 2:1 (MgCl2·6H2O-[Ch]Cl)) was explained, using thermal analysis techniques. Physicochemical clarification of overall thermal decomposition mechanism and the influence of enthalpy–entropy compensation (EEC) on reactions mechanism emerging are presented for the first time, in favor of this DES type. In the kinetic analysis of the decomposition process, two approaches were used: model-free (inverse) and model-based (direct) methods. It was found that thermodynamic principles in the form of EEC are the source of kinetic compensation effect (KCE) during MgCl2·6H2O-[Ch]Cl thermal decomposition, as a consequence of the effects of molecular interactions. Key phenomenon in the complex multiple step process represents a parallel dehydration steps of MgCl2·6H2O in DES, leading to formation of intermediates, such as [MgCl1(H2O)5]1+ and [MgCl2(H2O)4]. It was established that formation of final products (Mg(OH)2 and MgOHCl) requires a higher expenditure of energy to overcome a high potential barrier, where reaction system compensates this energy via hydrogen bonding disruption. This was confirmed by the identification of a specific ‘oscillator’, flagged as Hsingle bondOsingle bondH···Cl hydrogen bond donating system of the energy (“heat bath”). All kinetic parameters and mechanisms of individual reaction steps were confirmed by numerical optimization of the process and modulated dynamic predictions.",
publisher = "Elsevier",
journal = "Journal of Molecular Liquids",
title = "Thermal decomposition kinetics of deep eutectic solvent (DES) based on choline chloride and magnesium chloride hexahydrate: New details on the reaction mechanism and enthalpy–entropy compensation (EEC)",
pages = "M21~-121274",
volume = "374",
doi = "10.1016/j.molliq.2023.121274"
}

Janković, B., Manić, N., Perović, I., Vujković, M.,& Zdolšek, N.. (2023). Thermal decomposition kinetics of deep eutectic solvent (DES) based on choline chloride and magnesium chloride hexahydrate: New details on the reaction mechanism and enthalpy–entropy compensation (EEC). in Journal of Molecular Liquids
Elsevier., 374, 121274-M21~.
https://doi.org/10.1016/j.molliq.2023.121274

Janković B, Manić N, Perović I, Vujković M, Zdolšek N. Thermal decomposition kinetics of deep eutectic solvent (DES) based on choline chloride and magnesium chloride hexahydrate: New details on the reaction mechanism and enthalpy–entropy compensation (EEC). in Journal of Molecular Liquids. 2023;374:121274-M21~.
doi:10.1016/j.molliq.2023.121274 .

Janković, Bojan, Manić, Nebojša, Perović, Ivana, Vujković, Milica, Zdolšek, Nikola, "Thermal decomposition kinetics of deep eutectic solvent (DES) based on choline chloride and magnesium chloride hexahydrate: New details on the reaction mechanism and enthalpy–entropy compensation (EEC)" in Journal of Molecular Liquids, 374 (2023):121274-M21~,
https://doi.org/10.1016/j.molliq.2023.121274 . .

TY  - JOUR
AU  - Janković, Bojan
AU  - Manić, Nebojša
AU  - Popović, Mina
AU  - Cvetković, Slobodan
AU  - Dželetović, Željko
AU  - Stojiljković, Dragoslava
PY  - 2023
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/4135
AB  - This work provides insight into possibilities of maximum utilization of C3-C4 energy crops for thermo-chemical conversion (slow pyrolysis) into high value biochemicals, platform chemicals, drop-in fuels and combustible gases, using coupled kinetic and thermodynamic analyses. In order to examine the kinetics of decomposition of lignocellulosic components, model-free and model-based methods faded from thermal analysis data were used. Thermodynamic compensation was used for explicatory of entropy controlled process, where conformational changes and chemical exchange directly affect the type and distribution of obtained pyrolytic products. It was shown that external variable (i.e. the heating rate/temperature) does not change either an entire reaction mechanism (mechanistic nature of MG and AD pyrolyses) or transition state, but it changes activation enthalpy and activation entropy which lead to differences in terms of heat energy consumption, pyrolysis favorability and thus rates of generation of activated complex among feedstocks. To investigate the interplay of catalysts (present in feedstocks as minerals) and reactants, selective energy transfer (SET) model was applied. The model showed an activity of catalyst with different outputs towards two reactants, lignin part of the structure in MG and 1,8-cineole in AD. It was shown that AD is more convenient for thermal conversion than MG, regarding to lower transformation energy requirement, higher reactivity, as well as much faster accumulation of products.
PB  - Elsevier B.V.
T2  - Industrial Crops and Products
T1  - Kinetic and thermodynamic compensation phenomena in C3 and C4 energy crops pyrolysis: Implications on reaction mechanisms and product distributions
IS  - 116275
VL  - 194
DO  - doi.org/10.1016/j.indcrop.2023.116275
ER  - 

@article{
author = "Janković, Bojan and Manić, Nebojša and Popović, Mina and Cvetković, Slobodan and Dželetović, Željko and Stojiljković, Dragoslava",
year = "2023",
abstract = "This work provides insight into possibilities of maximum utilization of C3-C4 energy crops for thermo-chemical conversion (slow pyrolysis) into high value biochemicals, platform chemicals, drop-in fuels and combustible gases, using coupled kinetic and thermodynamic analyses. In order to examine the kinetics of decomposition of lignocellulosic components, model-free and model-based methods faded from thermal analysis data were used. Thermodynamic compensation was used for explicatory of entropy controlled process, where conformational changes and chemical exchange directly affect the type and distribution of obtained pyrolytic products. It was shown that external variable (i.e. the heating rate/temperature) does not change either an entire reaction mechanism (mechanistic nature of MG and AD pyrolyses) or transition state, but it changes activation enthalpy and activation entropy which lead to differences in terms of heat energy consumption, pyrolysis favorability and thus rates of generation of activated complex among feedstocks. To investigate the interplay of catalysts (present in feedstocks as minerals) and reactants, selective energy transfer (SET) model was applied. The model showed an activity of catalyst with different outputs towards two reactants, lignin part of the structure in MG and 1,8-cineole in AD. It was shown that AD is more convenient for thermal conversion than MG, regarding to lower transformation energy requirement, higher reactivity, as well as much faster accumulation of products.",
publisher = "Elsevier B.V.",
journal = "Industrial Crops and Products",
title = "Kinetic and thermodynamic compensation phenomena in C3 and C4 energy crops pyrolysis: Implications on reaction mechanisms and product distributions",
number = "116275",
volume = "194",
doi = "doi.org/10.1016/j.indcrop.2023.116275"
}

Janković, B., Manić, N., Popović, M., Cvetković, S., Dželetović, Ž.,& Stojiljković, D.. (2023). Kinetic and thermodynamic compensation phenomena in C3 and C4 energy crops pyrolysis: Implications on reaction mechanisms and product distributions. in Industrial Crops and Products
Elsevier B.V.., 194(116275).
https://doi.org/doi.org/10.1016/j.indcrop.2023.116275

Janković B, Manić N, Popović M, Cvetković S, Dželetović Ž, Stojiljković D. Kinetic and thermodynamic compensation phenomena in C3 and C4 energy crops pyrolysis: Implications on reaction mechanisms and product distributions. in Industrial Crops and Products. 2023;194(116275).
doi:doi.org/10.1016/j.indcrop.2023.116275 .

Janković, Bojan, Manić, Nebojša, Popović, Mina, Cvetković, Slobodan, Dželetović, Željko, Stojiljković, Dragoslava, "Kinetic and thermodynamic compensation phenomena in C3 and C4 energy crops pyrolysis: Implications on reaction mechanisms and product distributions" in Industrial Crops and Products, 194, no. 116275 (2023),
https://doi.org/doi.org/10.1016/j.indcrop.2023.116275 . .

TY  - JOUR
AU  - Manić, Nebojša
AU  - Janković, Bojan
AU  - Stojiljković, Dragoslava
AU  - Popović, Mina
AU  - Cvetković, Slobodan
AU  - Mikulčić, Hrvoje
PY  - 2023
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3954
AB  - The actual paper analyses the performance of different energy crop biomasses, Miscanthus x giganteus Greef et Deu (EC-1) and Arundo donax L. (EC-2) stems, during slow pyrolysis process monitored by simultaneous TG-DTG-MS techniques, through chemical exergy analysis. In addition to considering the physical and chemical characteristics of given feedstocks for their efficient thermo-chemical conversion into pyrolytic gas, in this study, a theoretical simulation for their implementation use in the gasification process was also performed. The performed thermodynamic study with detailed exergy analysis showed that the large contribution of exergy in syngas components such as CO and H2 originates primarily from cellulose pyrolysis of EC-1, while large exergy contribution in syngas component as CH4 originates from lignin pyrolysis of EC-2. It was founded that the exergy efficiency of syngas for EC-1 equals 19.04%, which is lower than the exergy efficiency of syngas for EC-2 (20.46%), as a result of higher ash content in EC-1. Also, it was reported that higher carbon (C) and hydrogen (H) contents present in the EC-2 sample generate higher gaseous energy and exergy values, i.e. the increment of exergy efficiency of syngas, by both approaches (pyrolysis and gasification exergy analysis), but results in a lower biomass chemical exergy (18.28 MJ kg−1). The methodology applied to the gasification process was shown a higher exergy efficiency for EC-2 (∼36 – 42%) than for EC-1 (∼33 – 39%), dependant on the equivalence ratio (ER).
PB  - Elsevier
T2  - Thermochimica Acta
T1  - Thermodynamic study on energy crops thermochemical conversion to increase the efficiency of energy production
SP  - 179408
VL  - 719
DO  - https://doi.org/10.1016/j.tca.2022.179408
ER  - 

@article{
author = "Manić, Nebojša and Janković, Bojan and Stojiljković, Dragoslava and Popović, Mina and Cvetković, Slobodan and Mikulčić, Hrvoje",
year = "2023",
abstract = "The actual paper analyses the performance of different energy crop biomasses, Miscanthus x giganteus Greef et Deu (EC-1) and Arundo donax L. (EC-2) stems, during slow pyrolysis process monitored by simultaneous TG-DTG-MS techniques, through chemical exergy analysis. In addition to considering the physical and chemical characteristics of given feedstocks for their efficient thermo-chemical conversion into pyrolytic gas, in this study, a theoretical simulation for their implementation use in the gasification process was also performed. The performed thermodynamic study with detailed exergy analysis showed that the large contribution of exergy in syngas components such as CO and H2 originates primarily from cellulose pyrolysis of EC-1, while large exergy contribution in syngas component as CH4 originates from lignin pyrolysis of EC-2. It was founded that the exergy efficiency of syngas for EC-1 equals 19.04%, which is lower than the exergy efficiency of syngas for EC-2 (20.46%), as a result of higher ash content in EC-1. Also, it was reported that higher carbon (C) and hydrogen (H) contents present in the EC-2 sample generate higher gaseous energy and exergy values, i.e. the increment of exergy efficiency of syngas, by both approaches (pyrolysis and gasification exergy analysis), but results in a lower biomass chemical exergy (18.28 MJ kg−1). The methodology applied to the gasification process was shown a higher exergy efficiency for EC-2 (∼36 – 42%) than for EC-1 (∼33 – 39%), dependant on the equivalence ratio (ER).",
publisher = "Elsevier",
journal = "Thermochimica Acta",
title = "Thermodynamic study on energy crops thermochemical conversion to increase the efficiency of energy production",
pages = "179408",
volume = "719",
doi = "https://doi.org/10.1016/j.tca.2022.179408"
}

Manić, N., Janković, B., Stojiljković, D., Popović, M., Cvetković, S.,& Mikulčić, H.. (2023). Thermodynamic study on energy crops thermochemical conversion to increase the efficiency of energy production. in Thermochimica Acta
Elsevier., 719, 179408.
https://doi.org/https://doi.org/10.1016/j.tca.2022.179408

Manić N, Janković B, Stojiljković D, Popović M, Cvetković S, Mikulčić H. Thermodynamic study on energy crops thermochemical conversion to increase the efficiency of energy production. in Thermochimica Acta. 2023;719:179408.
doi:https://doi.org/10.1016/j.tca.2022.179408 .

Manić, Nebojša, Janković, Bojan, Stojiljković, Dragoslava, Popović, Mina, Cvetković, Slobodan, Mikulčić, Hrvoje, "Thermodynamic study on energy crops thermochemical conversion to increase the efficiency of energy production" in Thermochimica Acta, 719 (2023):179408,
https://doi.org/https://doi.org/10.1016/j.tca.2022.179408 . .

TY  - CONF
AU  - Janković, Bojan
AU  - Janković, Marija
AU  - Krneta Nikolić, Jelena
AU  - Rajačić, Milica
AU  - Vukanac, Ivana
AU  - Sarap, Nataša
AU  - Manić, Nebojša
PY  - 2023
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/7238
AB  - In this work, the thermal decomposition process of coal bottom ash (collected after lignite
combustion in coal-fired power plant “Kostolac B” (TEKO-B), Serbia) was investigated, using
simultaneous TG (thermogravimetry) – DTG (derivative thermogravimetry) techniques
in an inert (Ar) atmosphere, at various heating rates (10.3, 20.9 and 32.1 K/min). In addition
to thermal characterization of the sample, the chemical composition and naturally occurred
radionuclides were also determined. Using the model-free (isoconversional) (by Friedman
(FR), Kissinger-Akahira-Sunose (KAS), Ozawa-Flynn-Wall (OFW) and Vyazovkin (VY)
methods) analysis, the complex kinetic nature of the process was successfully resolved. The
conducted numerical optimization of the process (using non-linear least square optimization)
had confirmed accuracy and reliability of estimated kinetic parameters. Model-based
(model-fitting) kinetic analysis showed the existence of a complex reaction scheme, over
two consecutive reactions steps and one single-stage reaction step, via mechanism order An,
F2, Fn, R3, Cnm (through n-dimensional nucleation/growth, chemical reactions, and n-th
order and m-power with autocatalysis mechanisms). Through physicochemical interpretation
of mechanism scheme, an assessment of recovery of valuable metals and metal oxides was
performed, by analysing the concentration of reaction species in a function of temperature of
individual steps. Likewise, the influence of certain precursor involved in decomposition process
as catalyst (in order to increase the yield of targeted product) was also inspected. Finally,
the simulation of actual process using the results obtained from applied methods/models was
performed, through application of modulated dynamic (MD) prediction.
PB  - Budapest : Akadémiai Kiadó
C3  - JTACC 2023
T1  - Recovering of metals and metal oxides through thermal decomposition process of coal bottom ash: a comprehensive kinetic analysis
SP  - 263
UR  - https://hdl.handle.net/21.15107/rcub_machinery_7238
ER  - 

@conference{
author = "Janković, Bojan and Janković, Marija and Krneta Nikolić, Jelena and Rajačić, Milica and Vukanac, Ivana and Sarap, Nataša and Manić, Nebojša",
year = "2023",
abstract = "In this work, the thermal decomposition process of coal bottom ash (collected after lignite
combustion in coal-fired power plant “Kostolac B” (TEKO-B), Serbia) was investigated, using
simultaneous TG (thermogravimetry) – DTG (derivative thermogravimetry) techniques
in an inert (Ar) atmosphere, at various heating rates (10.3, 20.9 and 32.1 K/min). In addition
to thermal characterization of the sample, the chemical composition and naturally occurred
radionuclides were also determined. Using the model-free (isoconversional) (by Friedman
(FR), Kissinger-Akahira-Sunose (KAS), Ozawa-Flynn-Wall (OFW) and Vyazovkin (VY)
methods) analysis, the complex kinetic nature of the process was successfully resolved. The
conducted numerical optimization of the process (using non-linear least square optimization)
had confirmed accuracy and reliability of estimated kinetic parameters. Model-based
(model-fitting) kinetic analysis showed the existence of a complex reaction scheme, over
two consecutive reactions steps and one single-stage reaction step, via mechanism order An,
F2, Fn, R3, Cnm (through n-dimensional nucleation/growth, chemical reactions, and n-th
order and m-power with autocatalysis mechanisms). Through physicochemical interpretation
of mechanism scheme, an assessment of recovery of valuable metals and metal oxides was
performed, by analysing the concentration of reaction species in a function of temperature of
individual steps. Likewise, the influence of certain precursor involved in decomposition process
as catalyst (in order to increase the yield of targeted product) was also inspected. Finally,
the simulation of actual process using the results obtained from applied methods/models was
performed, through application of modulated dynamic (MD) prediction.",
publisher = "Budapest : Akadémiai Kiadó",
journal = "JTACC 2023",
title = "Recovering of metals and metal oxides through thermal decomposition process of coal bottom ash: a comprehensive kinetic analysis",
pages = "263",
url = "https://hdl.handle.net/21.15107/rcub_machinery_7238"
}

Janković, B., Janković, M., Krneta Nikolić, J., Rajačić, M., Vukanac, I., Sarap, N.,& Manić, N.. (2023). Recovering of metals and metal oxides through thermal decomposition process of coal bottom ash: a comprehensive kinetic analysis. in JTACC 2023
Budapest : Akadémiai Kiadó., 263.
https://hdl.handle.net/21.15107/rcub_machinery_7238

Janković B, Janković M, Krneta Nikolić J, Rajačić M, Vukanac I, Sarap N, Manić N. Recovering of metals and metal oxides through thermal decomposition process of coal bottom ash: a comprehensive kinetic analysis. in JTACC 2023. 2023;:263.
https://hdl.handle.net/21.15107/rcub_machinery_7238 .

Janković, Bojan, Janković, Marija, Krneta Nikolić, Jelena, Rajačić, Milica, Vukanac, Ivana, Sarap, Nataša, Manić, Nebojša, "Recovering of metals and metal oxides through thermal decomposition process of coal bottom ash: a comprehensive kinetic analysis" in JTACC 2023 (2023):263,
https://hdl.handle.net/21.15107/rcub_machinery_7238 .

TY  - CONF
AU  - Manić, Nebojš
AU  - Janković, Bojan
AU  - Veljković, Filip
AU  - Pijović, Milena
PY  - 2023
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/7241
AB  - This paper considers possible uses of fruit-based waste for the production of valuable chemicals
and biofuel precursors through recycling by thermochemical conversion. Slow pyrolysis of goji
berry mesocarp as sugar-riched feedstock was investigated using simultaneous thermal analysis
measurements in non-isothermal conditions. This work announced that pyrolysis of goji berry
mesocarp represents a promising route to obtaining an important key platform chemical - 5-
hydroxymethylfurfural (5-HMF). To establish the process mechanism, two kinetic approaches
were used for kinetic parameters determination: first, Friedman’s and Vyazovkin’s model-free
(inverse) methods supported by numerical optimization of the process, and second, the modelbased
(direct) method. Model-free results showed a complex evolution of activation energy with
conversion, indicating a multi-step mechanism. It was found that autocatalytic dehydration of
fructose (in the presence of Lewis acids) is responsible for the production of 5-HMF at a low
heating rate (5.0 K/min) with a maximum 5-HMF theoretical yield of 63.20 %. Higher heating
rates (10.0 K/min and 15.0 K/min) trigger the fructose autogenesis behavior which opens the
transferability channel to glucose (substrate) engagement for 5-HMF theoretical high yield
production. It was revealed that differences between kinetic parameters are a consequence of the
change in the mechanism of glycosidic bond cleavage. The validity of the proposed reaction
mechanism scheme and accuracy of kinetic parameters was confirmed by modulated dynamic
predictions.
PB  - SDEWES - International Centre for Sustainable Development of Energy, Water and Environment Systems
PB  - Faculty of Mechanical Engineering and Naval Architecture, Zagreb
C3  - Book of Abstracts 18th Conference on Sustainable Development of Energy, Water and Environment Systems
T1  - The kinetic study of fruit processing waste pyrolysis for efficient production of  platform chemicals
IS  - SDEWES2023.0509
UR  - https://hdl.handle.net/21.15107/rcub_machinery_7241
ER  - 

@conference{
author = "Manić, Nebojš and Janković, Bojan and Veljković, Filip and Pijović, Milena",
year = "2023",
abstract = "This paper considers possible uses of fruit-based waste for the production of valuable chemicals
and biofuel precursors through recycling by thermochemical conversion. Slow pyrolysis of goji
berry mesocarp as sugar-riched feedstock was investigated using simultaneous thermal analysis
measurements in non-isothermal conditions. This work announced that pyrolysis of goji berry
mesocarp represents a promising route to obtaining an important key platform chemical - 5-
hydroxymethylfurfural (5-HMF). To establish the process mechanism, two kinetic approaches
were used for kinetic parameters determination: first, Friedman’s and Vyazovkin’s model-free
(inverse) methods supported by numerical optimization of the process, and second, the modelbased
(direct) method. Model-free results showed a complex evolution of activation energy with
conversion, indicating a multi-step mechanism. It was found that autocatalytic dehydration of
fructose (in the presence of Lewis acids) is responsible for the production of 5-HMF at a low
heating rate (5.0 K/min) with a maximum 5-HMF theoretical yield of 63.20 %. Higher heating
rates (10.0 K/min and 15.0 K/min) trigger the fructose autogenesis behavior which opens the
transferability channel to glucose (substrate) engagement for 5-HMF theoretical high yield
production. It was revealed that differences between kinetic parameters are a consequence of the
change in the mechanism of glycosidic bond cleavage. The validity of the proposed reaction
mechanism scheme and accuracy of kinetic parameters was confirmed by modulated dynamic
predictions.",
publisher = "SDEWES - International Centre for Sustainable Development of Energy, Water and Environment Systems, Faculty of Mechanical Engineering and Naval Architecture, Zagreb",
journal = "Book of Abstracts 18th Conference on Sustainable Development of Energy, Water and Environment Systems",
title = "The kinetic study of fruit processing waste pyrolysis for efficient production of  platform chemicals",
number = "SDEWES2023.0509",
url = "https://hdl.handle.net/21.15107/rcub_machinery_7241"
}

Manić, N., Janković, B., Veljković, F.,& Pijović, M.. (2023). The kinetic study of fruit processing waste pyrolysis for efficient production of  platform chemicals. in Book of Abstracts 18th Conference on Sustainable Development of Energy, Water and Environment Systems
SDEWES - International Centre for Sustainable Development of Energy, Water and Environment Systems.(SDEWES2023.0509).
https://hdl.handle.net/21.15107/rcub_machinery_7241

Manić N, Janković B, Veljković F, Pijović M. The kinetic study of fruit processing waste pyrolysis for efficient production of  platform chemicals. in Book of Abstracts 18th Conference on Sustainable Development of Energy, Water and Environment Systems. 2023;(SDEWES2023.0509).
https://hdl.handle.net/21.15107/rcub_machinery_7241 .

Manić, Nebojš, Janković, Bojan, Veljković, Filip, Pijović, Milena, "The kinetic study of fruit processing waste pyrolysis for efficient production of  platform chemicals" in Book of Abstracts 18th Conference on Sustainable Development of Energy, Water and Environment Systems, no. SDEWES2023.0509 (2023),
https://hdl.handle.net/21.15107/rcub_machinery_7241 .

TY  - JOUR
AU  - Brat, Zagorka M.
AU  - Janković, Bojan
AU  - Stojiljković, Dragoslava
AU  - Radojević, Miloš
AU  - Manić, Nebojša
PY  - 2022
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3745
AB  - The preliminary thermogravimetric studies of co-pyrolyzed low rank coals (lignites Kostolac and Kolubara) with waste materials (spent coffee ground and waste rubber granulate) in a form of blends have been performed. Thermal analysis measurements of blend samples were carried out in a nitrogen, atmosphere at three different heating rates of 10, 15, and 20 K per minute. The coal-waste blends were prepared in the percentage ratios of 90:10, 80:20, and 70:30. This work analyzed the synergy analysis for considered blends shown via descriptive parameters during co-pyrolysis process. According to the performed analysis, the presence of synergistic effect was identified, where strong interactions were also observed. For lignite-spent coffee ground blends, it was found that two factors which affect the synergy effect with coal are concentration of added biomass material and the heating rate. For lignite-tire rubber granulate blends, the blending ratio take on a decisive role for positive consequences of a synergistic effect (ratios below 30% of tire rubber granulate in coals are desirable). Also, in this work the influence of micro-scale condition parameters such as heating rate (as the experimental regulatory factor) was analyzed on the magnitude response of synergism during co-pyrolysis.
PB  - Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd
T2  - Thermal Science
T1  - Assessment of synergistic effect on performing the co-pyrolysis process of coal and waste blends based on thermal analysis
EP  - 2224
IS  - 3
SP  - 2211
VL  - 26
DO  - 10.2298/TSCI210516310B
ER  - 

@article{
author = "Brat, Zagorka M. and Janković, Bojan and Stojiljković, Dragoslava and Radojević, Miloš and Manić, Nebojša",
year = "2022",
abstract = "The preliminary thermogravimetric studies of co-pyrolyzed low rank coals (lignites Kostolac and Kolubara) with waste materials (spent coffee ground and waste rubber granulate) in a form of blends have been performed. Thermal analysis measurements of blend samples were carried out in a nitrogen, atmosphere at three different heating rates of 10, 15, and 20 K per minute. The coal-waste blends were prepared in the percentage ratios of 90:10, 80:20, and 70:30. This work analyzed the synergy analysis for considered blends shown via descriptive parameters during co-pyrolysis process. According to the performed analysis, the presence of synergistic effect was identified, where strong interactions were also observed. For lignite-spent coffee ground blends, it was found that two factors which affect the synergy effect with coal are concentration of added biomass material and the heating rate. For lignite-tire rubber granulate blends, the blending ratio take on a decisive role for positive consequences of a synergistic effect (ratios below 30% of tire rubber granulate in coals are desirable). Also, in this work the influence of micro-scale condition parameters such as heating rate (as the experimental regulatory factor) was analyzed on the magnitude response of synergism during co-pyrolysis.",
publisher = "Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd",
journal = "Thermal Science",
title = "Assessment of synergistic effect on performing the co-pyrolysis process of coal and waste blends based on thermal analysis",
pages = "2224-2211",
number = "3",
volume = "26",
doi = "10.2298/TSCI210516310B"
}

Brat, Z. M., Janković, B., Stojiljković, D., Radojević, M.,& Manić, N.. (2022). Assessment of synergistic effect on performing the co-pyrolysis process of coal and waste blends based on thermal analysis. in Thermal Science
Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd., 26(3), 2211-2224.
https://doi.org/10.2298/TSCI210516310B

Brat ZM, Janković B, Stojiljković D, Radojević M, Manić N. Assessment of synergistic effect on performing the co-pyrolysis process of coal and waste blends based on thermal analysis. in Thermal Science. 2022;26(3):2211-2224.
doi:10.2298/TSCI210516310B .

Brat, Zagorka M., Janković, Bojan, Stojiljković, Dragoslava, Radojević, Miloš, Manić, Nebojša, "Assessment of synergistic effect on performing the co-pyrolysis process of coal and waste blends based on thermal analysis" in Thermal Science, 26, no. 3 (2022):2211-2224,
https://doi.org/10.2298/TSCI210516310B . .

TY  - JOUR
AU  - Angelopoulos, Panagiotis M.
AU  - Manić, Nebojša
AU  - Janković, Bojan
AU  - Taxiarchou, Maria
PY  - 2022
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3707
AB  - Thermal decomposition of hydrous volcanic glass occurs through the release of different water species under overlapping processes over wide temperature range. Its investigation is of practical interest since it constitutes integral processing part towards its valorization as source for the production of high-quality porous material for various applications. The study presents investigation of thermal decomposition of hydrous rhyolite through the non-isothermal solid-state kinetics approach. Rhyolite decomposition occurs through three partially overlapping processes, where loosely held and chemically bound water, as well as hydroxyl release at different temperature regions and through different mechanisms. The separation of overlapped thermal curves was done through peak deconvolution method using Frazier-Suzuki equation. Subsequently, the isoconversional (model-free) Friedman, generalized master-plots and Kissinger methods were applied for the determination of apparent activation energy (E-a), reaction model (f(a)) and pre-exponential factor (A) for each individual reaction step considered. Using the kinetic triplet values of each process, the kinetic rate equations were combined allowing precise simulation of the dehydration and dihydroxylation processes. A comparison of model results with thermogravimetric (TG) data, as well as data from the literature, showed the satisfactory accuracy of the model in the simulation of the process and the successful prediction of each water type fraction, during the process evolution. Spectroscopy techniques in UV-VIS and NIR (near infra-red) spectral ranges were applied to raw rhyolite and sample with different water content allowed calculation of color coordinates and its correlation with dehydration and dehydroxylation degrees, and also identification of water species.
PB  - Elsevier, Amsterdam
T2  - Thermochimica Acta
T1  - Thermal decomposition of volcanic glass (rhyolite): Kinetic deconvolution of dehydration and dehydroxylation process
VL  - 707
DO  - 10.1016/j.tca.2021.179082
ER  - 

@article{
author = "Angelopoulos, Panagiotis M. and Manić, Nebojša and Janković, Bojan and Taxiarchou, Maria",
year = "2022",
abstract = "Thermal decomposition of hydrous volcanic glass occurs through the release of different water species under overlapping processes over wide temperature range. Its investigation is of practical interest since it constitutes integral processing part towards its valorization as source for the production of high-quality porous material for various applications. The study presents investigation of thermal decomposition of hydrous rhyolite through the non-isothermal solid-state kinetics approach. Rhyolite decomposition occurs through three partially overlapping processes, where loosely held and chemically bound water, as well as hydroxyl release at different temperature regions and through different mechanisms. The separation of overlapped thermal curves was done through peak deconvolution method using Frazier-Suzuki equation. Subsequently, the isoconversional (model-free) Friedman, generalized master-plots and Kissinger methods were applied for the determination of apparent activation energy (E-a), reaction model (f(a)) and pre-exponential factor (A) for each individual reaction step considered. Using the kinetic triplet values of each process, the kinetic rate equations were combined allowing precise simulation of the dehydration and dihydroxylation processes. A comparison of model results with thermogravimetric (TG) data, as well as data from the literature, showed the satisfactory accuracy of the model in the simulation of the process and the successful prediction of each water type fraction, during the process evolution. Spectroscopy techniques in UV-VIS and NIR (near infra-red) spectral ranges were applied to raw rhyolite and sample with different water content allowed calculation of color coordinates and its correlation with dehydration and dehydroxylation degrees, and also identification of water species.",
publisher = "Elsevier, Amsterdam",
journal = "Thermochimica Acta",
title = "Thermal decomposition of volcanic glass (rhyolite): Kinetic deconvolution of dehydration and dehydroxylation process",
volume = "707",
doi = "10.1016/j.tca.2021.179082"
}

Angelopoulos, P. M., Manić, N., Janković, B.,& Taxiarchou, M.. (2022). Thermal decomposition of volcanic glass (rhyolite): Kinetic deconvolution of dehydration and dehydroxylation process. in Thermochimica Acta
Elsevier, Amsterdam., 707.
https://doi.org/10.1016/j.tca.2021.179082

Angelopoulos PM, Manić N, Janković B, Taxiarchou M. Thermal decomposition of volcanic glass (rhyolite): Kinetic deconvolution of dehydration and dehydroxylation process. in Thermochimica Acta. 2022;707.
doi:10.1016/j.tca.2021.179082 .

Angelopoulos, Panagiotis M., Manić, Nebojša, Janković, Bojan, Taxiarchou, Maria, "Thermal decomposition of volcanic glass (rhyolite): Kinetic deconvolution of dehydration and dehydroxylation process" in Thermochimica Acta, 707 (2022),
https://doi.org/10.1016/j.tca.2021.179082 . .

TY  - JOUR
AU  - Janković, Bojan
AU  - Manić, Nebojša
AU  - Jović, Mihajlo
AU  - Smiciklas, Ivana
PY  - 2022
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3686
AB  - The issue of accumulated seashell waste has been increasingly addressed in the studies of its applicability as a secondary source of calcium carbonate. In this work, the mechanism of the thermo-oxidative degradation of two types of mollusk shells (Dosinia exoleta-DE and oyster Ostrea edulis-OE) was investigated using simultaneous thermal analysis. Physicochemical characterization of raw and calcined materials was performed by XRD and SEM techniques. Results show that increasing powder particle size and heating rate affect the degradation of investigated shells differently and have a significant contribution to released quantities of CO2. It was proposed that the calcination rate of DE powders is determined by the strain-induced collapse of CO2-deficient calcite at its interface with crystalline CaO rods-like structure, with simultaneous expulsion of CO2. A much higher CO2 concentration was identified during the degradation of OE powders, favoring the carbonation reaction and, consequently, increasing the temperature and activation energy of the investigated reaction. Under elevated CO2 concentration, the CaO aggregation step is enhanced by slower reaction kinetics at lower temperatures since both CO2 desorption and structural transformations are probably hindered. The proposed mechanism leads to a meaningful correlation between thermodynamic quantities (enthalpy-entropy compensation) in the form of an iso-kinetic relationship.
PB  - Springer, Dordrecht
T2  - Journal of Thermal Analysis and Calorimetry
T1  - Kinetic and thermodynamic analysis of thermo-oxidative degradation of seashell powders with different particle size fractions: compensation effect and iso-equilibrium phenomena
EP  - 2334
IS  - 3
SP  - 2305
VL  - 147
DO  - 10.1007/s10973-020-10474-8
ER  - 

@article{
author = "Janković, Bojan and Manić, Nebojša and Jović, Mihajlo and Smiciklas, Ivana",
year = "2022",
abstract = "The issue of accumulated seashell waste has been increasingly addressed in the studies of its applicability as a secondary source of calcium carbonate. In this work, the mechanism of the thermo-oxidative degradation of two types of mollusk shells (Dosinia exoleta-DE and oyster Ostrea edulis-OE) was investigated using simultaneous thermal analysis. Physicochemical characterization of raw and calcined materials was performed by XRD and SEM techniques. Results show that increasing powder particle size and heating rate affect the degradation of investigated shells differently and have a significant contribution to released quantities of CO2. It was proposed that the calcination rate of DE powders is determined by the strain-induced collapse of CO2-deficient calcite at its interface with crystalline CaO rods-like structure, with simultaneous expulsion of CO2. A much higher CO2 concentration was identified during the degradation of OE powders, favoring the carbonation reaction and, consequently, increasing the temperature and activation energy of the investigated reaction. Under elevated CO2 concentration, the CaO aggregation step is enhanced by slower reaction kinetics at lower temperatures since both CO2 desorption and structural transformations are probably hindered. The proposed mechanism leads to a meaningful correlation between thermodynamic quantities (enthalpy-entropy compensation) in the form of an iso-kinetic relationship.",
publisher = "Springer, Dordrecht",
journal = "Journal of Thermal Analysis and Calorimetry",
title = "Kinetic and thermodynamic analysis of thermo-oxidative degradation of seashell powders with different particle size fractions: compensation effect and iso-equilibrium phenomena",
pages = "2334-2305",
number = "3",
volume = "147",
doi = "10.1007/s10973-020-10474-8"
}

Janković, B., Manić, N., Jović, M.,& Smiciklas, I.. (2022). Kinetic and thermodynamic analysis of thermo-oxidative degradation of seashell powders with different particle size fractions: compensation effect and iso-equilibrium phenomena. in Journal of Thermal Analysis and Calorimetry
Springer, Dordrecht., 147(3), 2305-2334.
https://doi.org/10.1007/s10973-020-10474-8

Janković B, Manić N, Jović M, Smiciklas I. Kinetic and thermodynamic analysis of thermo-oxidative degradation of seashell powders with different particle size fractions: compensation effect and iso-equilibrium phenomena. in Journal of Thermal Analysis and Calorimetry. 2022;147(3):2305-2334.
doi:10.1007/s10973-020-10474-8 .

Janković, Bojan, Manić, Nebojša, Jović, Mihajlo, Smiciklas, Ivana, "Kinetic and thermodynamic analysis of thermo-oxidative degradation of seashell powders with different particle size fractions: compensation effect and iso-equilibrium phenomena" in Journal of Thermal Analysis and Calorimetry, 147, no. 3 (2022):2305-2334,
https://doi.org/10.1007/s10973-020-10474-8 . .

TY  - JOUR
AU  - Janković, Bojan
AU  - Manić, Nebojša
PY  - 2022
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/97
AB  - The pyrolysis of [4-(hydroxymethyl)phenoxymethyl]polystyrene (Wang) resin was studied by dynamic simultaneous thermogravimetric analysis (TGA) and derivative thermogravimetry techniques. The studied resin is used as the most commonly polymer supports in the peptide synthesis. A developed experimental master plots (exp-MP) model is presented that can be used to describe in more detail the pyrolysis of the resin established upon 4-hydroxybenzyl alcohol (PHB) on polystyrene, occurring throughout TGA experiments. This model assumes that the Wang resin is pyrolyzed through three parallel independent reaction steps, whereby their separation was performed through deconvolution procedure of the complex conversion rate curves. The mechanistic nature of each stage of Wang resin pyrolysis was explained by applying a combination of kinetic models such as diffusion mechanism, random nucleation and subsequent growth and chemical reactions mechanisms. The kinetic triplet parameters obtained in the present paper were then compared with those available in the literature. Within this kinetic study, the fraction distribution analysis (via distributed reactivity model) was performed, enabling reliable prediction of liquid products produced during the pyrolysis of the solid support of the Wang resin.
PB  - Springer, New York
T2  - Polymer Bulletin
T1  - Pyrolysis kinetics of [4-(hydroxymethyl)phenoxymethyl]polystyrene (Wang) resin using master-plot method and distributed reactivity model
DO  - 10.1007/s00289-022-04159-5
ER  - 

@article{
author = "Janković, Bojan and Manić, Nebojša",
year = "2022",
abstract = "The pyrolysis of [4-(hydroxymethyl)phenoxymethyl]polystyrene (Wang) resin was studied by dynamic simultaneous thermogravimetric analysis (TGA) and derivative thermogravimetry techniques. The studied resin is used as the most commonly polymer supports in the peptide synthesis. A developed experimental master plots (exp-MP) model is presented that can be used to describe in more detail the pyrolysis of the resin established upon 4-hydroxybenzyl alcohol (PHB) on polystyrene, occurring throughout TGA experiments. This model assumes that the Wang resin is pyrolyzed through three parallel independent reaction steps, whereby their separation was performed through deconvolution procedure of the complex conversion rate curves. The mechanistic nature of each stage of Wang resin pyrolysis was explained by applying a combination of kinetic models such as diffusion mechanism, random nucleation and subsequent growth and chemical reactions mechanisms. The kinetic triplet parameters obtained in the present paper were then compared with those available in the literature. Within this kinetic study, the fraction distribution analysis (via distributed reactivity model) was performed, enabling reliable prediction of liquid products produced during the pyrolysis of the solid support of the Wang resin.",
publisher = "Springer, New York",
journal = "Polymer Bulletin",
title = "Pyrolysis kinetics of [4-(hydroxymethyl)phenoxymethyl]polystyrene (Wang) resin using master-plot method and distributed reactivity model",
doi = "10.1007/s00289-022-04159-5"
}

Janković, B.,& Manić, N.. (2022). Pyrolysis kinetics of [4-(hydroxymethyl)phenoxymethyl]polystyrene (Wang) resin using master-plot method and distributed reactivity model. in Polymer Bulletin
Springer, New York..
https://doi.org/10.1007/s00289-022-04159-5

Janković B, Manić N. Pyrolysis kinetics of [4-(hydroxymethyl)phenoxymethyl]polystyrene (Wang) resin using master-plot method and distributed reactivity model. in Polymer Bulletin. 2022;.
doi:10.1007/s00289-022-04159-5 .

Janković, Bojan, Manić, Nebojša, "Pyrolysis kinetics of [4-(hydroxymethyl)phenoxymethyl]polystyrene (Wang) resin using master-plot method and distributed reactivity model" in Polymer Bulletin (2022),
https://doi.org/10.1007/s00289-022-04159-5 . .

TY  - JOUR
AU  - Milanović, Mihailo
AU  - Komatina, Mirko
AU  - Janković, Bojan
AU  - Stojiljković, Dragoslava
AU  - Manić, Nebojša
PY  - 2022
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/96
AB  - Sustainable development and mitigation of the climate changes are one of the main challenges of the circular economy, while the use of food industry residues could make an important contribution in tackling these challenges. In order to improve energy efficiency aspects of the industry residue treatment, generally, the drying process as the first step of the entire processing chain should be further analyzed. Regarding this, a comprehensive kinetic study was performed to provide the detailed mechanism of moisture removal from base raw material. Industrial residues from apple juice production were used for isothermal thermogravimetric analysis in the air atmosphere at different temperatures. Based on experimental data, different kinetic models were applied to determine kinetic parameters and dominant conversion functions. The dependence of the activation energy evaluated by Friedman's isoconversional method on the conversion degree shows that the drying process is complex one. The mechanism of drying process and corresponding kinetic parameters were determined by multivariate nonlinear regression program (model-based analysis) and checked by modulated isothermal prediction (for quasi-isothermal conditions) and the isothermal prediction (for different isothermal conditions) tests. It was pointed out that temperature-dependent reaction step controlling overall mechanism represents releasing of CO2 which can suppress autocatalytic action of the ethylene, influencing the flavor and texture changes of the apple tissue. Obtained results can be used for prediction of the life-time of studied material, corresponding to selected temperatures and different conversion levels.
PB  - Springer, Dordrecht
T2  - Journal of Thermal Analysis and Calorimetry
T1  - The kinetic study of juice industry residues drying process based on TGA-DTG experimental data
DO  - 10.1007/s10973-022-11289-5
ER  - 

@article{
author = "Milanović, Mihailo and Komatina, Mirko and Janković, Bojan and Stojiljković, Dragoslava and Manić, Nebojša",
year = "2022",
abstract = "Sustainable development and mitigation of the climate changes are one of the main challenges of the circular economy, while the use of food industry residues could make an important contribution in tackling these challenges. In order to improve energy efficiency aspects of the industry residue treatment, generally, the drying process as the first step of the entire processing chain should be further analyzed. Regarding this, a comprehensive kinetic study was performed to provide the detailed mechanism of moisture removal from base raw material. Industrial residues from apple juice production were used for isothermal thermogravimetric analysis in the air atmosphere at different temperatures. Based on experimental data, different kinetic models were applied to determine kinetic parameters and dominant conversion functions. The dependence of the activation energy evaluated by Friedman's isoconversional method on the conversion degree shows that the drying process is complex one. The mechanism of drying process and corresponding kinetic parameters were determined by multivariate nonlinear regression program (model-based analysis) and checked by modulated isothermal prediction (for quasi-isothermal conditions) and the isothermal prediction (for different isothermal conditions) tests. It was pointed out that temperature-dependent reaction step controlling overall mechanism represents releasing of CO2 which can suppress autocatalytic action of the ethylene, influencing the flavor and texture changes of the apple tissue. Obtained results can be used for prediction of the life-time of studied material, corresponding to selected temperatures and different conversion levels.",
publisher = "Springer, Dordrecht",
journal = "Journal of Thermal Analysis and Calorimetry",
title = "The kinetic study of juice industry residues drying process based on TGA-DTG experimental data",
doi = "10.1007/s10973-022-11289-5"
}

Milanović, M., Komatina, M., Janković, B., Stojiljković, D.,& Manić, N.. (2022). The kinetic study of juice industry residues drying process based on TGA-DTG experimental data. in Journal of Thermal Analysis and Calorimetry
Springer, Dordrecht..
https://doi.org/10.1007/s10973-022-11289-5

Milanović M, Komatina M, Janković B, Stojiljković D, Manić N. The kinetic study of juice industry residues drying process based on TGA-DTG experimental data. in Journal of Thermal Analysis and Calorimetry. 2022;.
doi:10.1007/s10973-022-11289-5 .

Milanović, Mihailo, Komatina, Mirko, Janković, Bojan, Stojiljković, Dragoslava, Manić, Nebojša, "The kinetic study of juice industry residues drying process based on TGA-DTG experimental data" in Journal of Thermal Analysis and Calorimetry (2022),
https://doi.org/10.1007/s10973-022-11289-5 . .

TY  - JOUR
AU  - Manić, Nebojša
AU  - Janković, Bojan
AU  - Stojiljković, Dragoslava
AU  - Angelopoulos, Panagiotis M.
AU  - Radojević, Miloš
PY  - 2022
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/94
AB  - The presented paper deals with the influence of the heating rate on combustion characteristics (reactivity and reactivity evaluation, ignition index (D-i), burnout index (D-f), the combustion performance index (S), and the combustion stability index (R-W)) of the protective coronavirus face masks. Two types of commonly used face masks in different state (new and exploited) were investigated by TG-DTG analysis in an air atmosphere, directly coupled with mass spectrometry (MS). Based on the experimental results, the impact of ultimate and proximate analysis data on the evolved gas analysis (EGA) was discussed. Also, the derived values from thermo-analytical (TA) data were compared with the literature reports, related to individual constitutive face mask materials. According to the performed research, it was established that different maximal reaction rate values at various heating rates indicate the complex nature of coronavirus face mask thermo-oxidative degradation, which is stimulated with carbon oxidation reactions and volatile matter (VM) release. By detailed analysis of obtained TG-DTG profiles, it was established that process takes place through the multiple-step reaction pathways, due to many vigorous radical reactions, causes by polymers degradation. The performed research was done to evaluate the possible utilization of coronavirus waste to energy production and sustainable pandemic environmental risk reduction.
PB  - Springer, Dordrecht
T2  - Journal of Thermal Analysis and Calorimetry
T1  - Thermal characteristics and combustion reactivity of coronavirus face masks using TG-DTG-MS analysis
DO  - 10.1007/s10973-022-11358-9
ER  - 

@article{
author = "Manić, Nebojša and Janković, Bojan and Stojiljković, Dragoslava and Angelopoulos, Panagiotis M. and Radojević, Miloš",
year = "2022",
abstract = "The presented paper deals with the influence of the heating rate on combustion characteristics (reactivity and reactivity evaluation, ignition index (D-i), burnout index (D-f), the combustion performance index (S), and the combustion stability index (R-W)) of the protective coronavirus face masks. Two types of commonly used face masks in different state (new and exploited) were investigated by TG-DTG analysis in an air atmosphere, directly coupled with mass spectrometry (MS). Based on the experimental results, the impact of ultimate and proximate analysis data on the evolved gas analysis (EGA) was discussed. Also, the derived values from thermo-analytical (TA) data were compared with the literature reports, related to individual constitutive face mask materials. According to the performed research, it was established that different maximal reaction rate values at various heating rates indicate the complex nature of coronavirus face mask thermo-oxidative degradation, which is stimulated with carbon oxidation reactions and volatile matter (VM) release. By detailed analysis of obtained TG-DTG profiles, it was established that process takes place through the multiple-step reaction pathways, due to many vigorous radical reactions, causes by polymers degradation. The performed research was done to evaluate the possible utilization of coronavirus waste to energy production and sustainable pandemic environmental risk reduction.",
publisher = "Springer, Dordrecht",
journal = "Journal of Thermal Analysis and Calorimetry",
title = "Thermal characteristics and combustion reactivity of coronavirus face masks using TG-DTG-MS analysis",
doi = "10.1007/s10973-022-11358-9"
}

Manić, N., Janković, B., Stojiljković, D., Angelopoulos, P. M.,& Radojević, M.. (2022). Thermal characteristics and combustion reactivity of coronavirus face masks using TG-DTG-MS analysis. in Journal of Thermal Analysis and Calorimetry
Springer, Dordrecht..
https://doi.org/10.1007/s10973-022-11358-9

Manić N, Janković B, Stojiljković D, Angelopoulos PM, Radojević M. Thermal characteristics and combustion reactivity of coronavirus face masks using TG-DTG-MS analysis. in Journal of Thermal Analysis and Calorimetry. 2022;.
doi:10.1007/s10973-022-11358-9 .

Manić, Nebojša, Janković, Bojan, Stojiljković, Dragoslava, Angelopoulos, Panagiotis M., Radojević, Miloš, "Thermal characteristics and combustion reactivity of coronavirus face masks using TG-DTG-MS analysis" in Journal of Thermal Analysis and Calorimetry (2022),
https://doi.org/10.1007/s10973-022-11358-9 . .

TY  - JOUR
AU  - Pijović, Milena
AU  - Manić, Nebojša
AU  - Vasić-Anicijević, Dragana
AU  - Krstić, Aleksandar
AU  - Mitrić, Miodrag
AU  - Matić, Tamara
AU  - Janković, Bojan
PY  - 2022
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3760
AB  - Pyrolytic tire (PT) chars were first produced from waste car tires (WCT) through carbonization process at 800 degrees C, for different retention times. Then, best PT-char sample by its physicochemical properties (WCT 800(1 h)) was further tested for its ability to adsorb Rhodamine B (RhB) dye from aqueous solutions. Structural characterization of synthesized material showed existence of graphene-based material, with average pore diameter of 22.8 nm and specific surface area of 55.8 m2.g- 1. Obtained carbon material meets specifications of commercial carbon black (CB). The yield of 33.6% of CB recovered has been achieved. Under the optimal conditions, 99.57% of RhB was removed. Adsorption of RhB obeys pseudo second-order model and Langmuir isotherm model. DFT (the density functional theory) was revealed that effective bonding of RhB onto WCT 800 originates from pi-electron interactions with aromatic moieties and chemical (or at least the electrostatic) interactions, between positive nitrogen and electron-rich surface groups.
PB  - Elsevier Science Sa, Lausanne
T2  - Diamond and Related Materials
T1  - Simple and effective one-step production of high-quality mesoporous pyrolytic char from waste tires: Rhodamine B adsorption kinetics and density functional theory (DFT) study
VL  - 121
DO  - 10.1016/j.diamond.2021.108768
ER  - 

@article{
author = "Pijović, Milena and Manić, Nebojša and Vasić-Anicijević, Dragana and Krstić, Aleksandar and Mitrić, Miodrag and Matić, Tamara and Janković, Bojan",
year = "2022",
abstract = "Pyrolytic tire (PT) chars were first produced from waste car tires (WCT) through carbonization process at 800 degrees C, for different retention times. Then, best PT-char sample by its physicochemical properties (WCT 800(1 h)) was further tested for its ability to adsorb Rhodamine B (RhB) dye from aqueous solutions. Structural characterization of synthesized material showed existence of graphene-based material, with average pore diameter of 22.8 nm and specific surface area of 55.8 m2.g- 1. Obtained carbon material meets specifications of commercial carbon black (CB). The yield of 33.6% of CB recovered has been achieved. Under the optimal conditions, 99.57% of RhB was removed. Adsorption of RhB obeys pseudo second-order model and Langmuir isotherm model. DFT (the density functional theory) was revealed that effective bonding of RhB onto WCT 800 originates from pi-electron interactions with aromatic moieties and chemical (or at least the electrostatic) interactions, between positive nitrogen and electron-rich surface groups.",
publisher = "Elsevier Science Sa, Lausanne",
journal = "Diamond and Related Materials",
title = "Simple and effective one-step production of high-quality mesoporous pyrolytic char from waste tires: Rhodamine B adsorption kinetics and density functional theory (DFT) study",
volume = "121",
doi = "10.1016/j.diamond.2021.108768"
}

Pijović, M., Manić, N., Vasić-Anicijević, D., Krstić, A., Mitrić, M., Matić, T.,& Janković, B.. (2022). Simple and effective one-step production of high-quality mesoporous pyrolytic char from waste tires: Rhodamine B adsorption kinetics and density functional theory (DFT) study. in Diamond and Related Materials
Elsevier Science Sa, Lausanne., 121.
https://doi.org/10.1016/j.diamond.2021.108768

Pijović M, Manić N, Vasić-Anicijević D, Krstić A, Mitrić M, Matić T, Janković B. Simple and effective one-step production of high-quality mesoporous pyrolytic char from waste tires: Rhodamine B adsorption kinetics and density functional theory (DFT) study. in Diamond and Related Materials. 2022;121.
doi:10.1016/j.diamond.2021.108768 .

Pijović, Milena, Manić, Nebojša, Vasić-Anicijević, Dragana, Krstić, Aleksandar, Mitrić, Miodrag, Matić, Tamara, Janković, Bojan, "Simple and effective one-step production of high-quality mesoporous pyrolytic char from waste tires: Rhodamine B adsorption kinetics and density functional theory (DFT) study" in Diamond and Related Materials, 121 (2022),
https://doi.org/10.1016/j.diamond.2021.108768 . .

TY  - JOUR
AU  - Manić, Nebojša
AU  - Janković, Bojan
PY  - 2022
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3715
AB  - With the increased popularity of using wood stoves for household heating in recent years, numerous experimental research projects have been launched with the goal of generating cleaner and more efficient stove designs. This work is focused on mathematical modeling of combustion process in low-power residential heating appliance (small-scale stove) fuelled by different wood pellets (WP1-Beech (hardwood) and WP2-Pine (softwood)). Kinetic model scheme that encompasses determination of Arrhenius parameters was proposed for applied Finite rate/Eddy Dissipation approach. Types of wood pellets have been combusted on the experimental stand which is equipped with a set of temperature sensors and exhaust analyzer. A comparison of results obtained from combustion in the heating unit has been performed to find relations between established kinetics of devolatilization for various wood pellets and to determine exhaust composition, arising from oxidation reactions. Numerical modeling using computational fluid dynamics (CFD) has been performed for the char and CO oxidations to supplement the experimental results. Due to limitations on installed stove such as poor design, air supply, fume extraction, or heat exchanger can lead to excessive CO emissions or lower energy efficiency. Outcomes show that it is crucial to minimize unused stove volume and to enhance gaseous mixing for reduction of CO emissions, while maintaining sufficiently high temperatures for supporting fast oxidation reactions. Results of comparisons of conducted analyses can be useful in areas related to process optimization and improvement of combustion and devolatilization reaction conditions in the small scale heating units.
PB  - Elsevier Sci Ltd, Oxford
T2  - Fuel
T1  - Determination of Arrhenius parameters for advanced kinetic model used in CFD modeling of the wood pellet combustion process
VL  - 323
DO  - 10.1016/j.fuel.2022.124323
ER  - 

@article{
author = "Manić, Nebojša and Janković, Bojan",
year = "2022",
abstract = "With the increased popularity of using wood stoves for household heating in recent years, numerous experimental research projects have been launched with the goal of generating cleaner and more efficient stove designs. This work is focused on mathematical modeling of combustion process in low-power residential heating appliance (small-scale stove) fuelled by different wood pellets (WP1-Beech (hardwood) and WP2-Pine (softwood)). Kinetic model scheme that encompasses determination of Arrhenius parameters was proposed for applied Finite rate/Eddy Dissipation approach. Types of wood pellets have been combusted on the experimental stand which is equipped with a set of temperature sensors and exhaust analyzer. A comparison of results obtained from combustion in the heating unit has been performed to find relations between established kinetics of devolatilization for various wood pellets and to determine exhaust composition, arising from oxidation reactions. Numerical modeling using computational fluid dynamics (CFD) has been performed for the char and CO oxidations to supplement the experimental results. Due to limitations on installed stove such as poor design, air supply, fume extraction, or heat exchanger can lead to excessive CO emissions or lower energy efficiency. Outcomes show that it is crucial to minimize unused stove volume and to enhance gaseous mixing for reduction of CO emissions, while maintaining sufficiently high temperatures for supporting fast oxidation reactions. Results of comparisons of conducted analyses can be useful in areas related to process optimization and improvement of combustion and devolatilization reaction conditions in the small scale heating units.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Fuel",
title = "Determination of Arrhenius parameters for advanced kinetic model used in CFD modeling of the wood pellet combustion process",
volume = "323",
doi = "10.1016/j.fuel.2022.124323"
}

Manić, N.,& Janković, B.. (2022). Determination of Arrhenius parameters for advanced kinetic model used in CFD modeling of the wood pellet combustion process. in Fuel
Elsevier Sci Ltd, Oxford., 323.
https://doi.org/10.1016/j.fuel.2022.124323

Manić N, Janković B. Determination of Arrhenius parameters for advanced kinetic model used in CFD modeling of the wood pellet combustion process. in Fuel. 2022;323.
doi:10.1016/j.fuel.2022.124323 .

Manić, Nebojša, Janković, Bojan, "Determination of Arrhenius parameters for advanced kinetic model used in CFD modeling of the wood pellet combustion process" in Fuel, 323 (2022),
https://doi.org/10.1016/j.fuel.2022.124323 . .

TY  - CONF
AU  - Stojiljković, Dragoslava
AU  - Manić, Nebojša
AU  - Janković, Bojan
AU  - Radojević, Miloš
AU  - Bešenić, Tibor
AU  - Vujanović, Milan
AU  - Jovanović, Vladimir
PY  - 2021
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/7243
AB  - The emission control from coal-fired power plants is on a global level in focus last decades due to environmental issues. The emission of nitrogen oxides is recognized among the other pollutants, as the key environmental problem related to energy production by the coal utilization. In this paper, the effect of fuel nitrogen delivery on the NOx precursors (HCN and NH3) during devolatilization processes of selected coal samples (with high content of nitrogen) has been examined. TG-DTG coupled with mass spectrometry (MS) experimental techniques was used for the assessment of nitrogen distribution for HCN and NH3 as intermediate species during coal devolatilization, which directly influences the emission of nitrogen oxides during the combustion process. Further by the establishment, the mass balance of nitrogen together with performed analysis of evolved gases, the distribution of nitrogen between volatiles and char could be also determined. The obtained data for particular coal samples could be exploited for further coal combustion process optimization in regard to NOx emissions, and can be used as the experimentally determined input parameters for mathematical modeling of the coal combustion process, in the large-scale coal-fired power plants.
PB  - Belgrade : Society of Thermal Engineers of Serbia
C3  - Programme & Full Papers Proceedings of Power Plants 2021
T1  - The estimation of fuel nitrogen distribution during the devolatilization process of coal by TG-DTG-MS analysis
UR  - https://hdl.handle.net/21.15107/rcub_machinery_7243
ER  - 

@conference{
author = "Stojiljković, Dragoslava and Manić, Nebojša and Janković, Bojan and Radojević, Miloš and Bešenić, Tibor and Vujanović, Milan and Jovanović, Vladimir",
year = "2021",
abstract = "The emission control from coal-fired power plants is on a global level in focus last decades due to environmental issues. The emission of nitrogen oxides is recognized among the other pollutants, as the key environmental problem related to energy production by the coal utilization. In this paper, the effect of fuel nitrogen delivery on the NOx precursors (HCN and NH3) during devolatilization processes of selected coal samples (with high content of nitrogen) has been examined. TG-DTG coupled with mass spectrometry (MS) experimental techniques was used for the assessment of nitrogen distribution for HCN and NH3 as intermediate species during coal devolatilization, which directly influences the emission of nitrogen oxides during the combustion process. Further by the establishment, the mass balance of nitrogen together with performed analysis of evolved gases, the distribution of nitrogen between volatiles and char could be also determined. The obtained data for particular coal samples could be exploited for further coal combustion process optimization in regard to NOx emissions, and can be used as the experimentally determined input parameters for mathematical modeling of the coal combustion process, in the large-scale coal-fired power plants.",
publisher = "Belgrade : Society of Thermal Engineers of Serbia",
journal = "Programme & Full Papers Proceedings of Power Plants 2021",
title = "The estimation of fuel nitrogen distribution during the devolatilization process of coal by TG-DTG-MS analysis",
url = "https://hdl.handle.net/21.15107/rcub_machinery_7243"
}

Stojiljković, D., Manić, N., Janković, B., Radojević, M., Bešenić, T., Vujanović, M.,& Jovanović, V.. (2021). The estimation of fuel nitrogen distribution during the devolatilization process of coal by TG-DTG-MS analysis. in Programme & Full Papers Proceedings of Power Plants 2021
Belgrade : Society of Thermal Engineers of Serbia..
https://hdl.handle.net/21.15107/rcub_machinery_7243

Stojiljković D, Manić N, Janković B, Radojević M, Bešenić T, Vujanović M, Jovanović V. The estimation of fuel nitrogen distribution during the devolatilization process of coal by TG-DTG-MS analysis. in Programme & Full Papers Proceedings of Power Plants 2021. 2021;.
https://hdl.handle.net/21.15107/rcub_machinery_7243 .

Stojiljković, Dragoslava, Manić, Nebojša, Janković, Bojan, Radojević, Miloš, Bešenić, Tibor, Vujanović, Milan, Jovanović, Vladimir, "The estimation of fuel nitrogen distribution during the devolatilization process of coal by TG-DTG-MS analysis" in Programme & Full Papers Proceedings of Power Plants 2021 (2021),
https://hdl.handle.net/21.15107/rcub_machinery_7243 .

TY  - CONF
AU  - Milanović, Mihailo
AU  - Komatina, Mirko
AU  - Janković, Bojan
AU  - Stojiljković, Dragoslava
AU  - Manić, Nebojša
PY  - 2021
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/7279
C3  - ICTAC 2020, p. 37, Online conference, Krakow, Poland
T1  - The kinetic study of juice industry residues drying process based on TG-DTG experimental data
UR  - https://hdl.handle.net/21.15107/rcub_machinery_7279
ER  - 

@conference{
author = "Milanović, Mihailo and Komatina, Mirko and Janković, Bojan and Stojiljković, Dragoslava and Manić, Nebojša",
year = "2021",
journal = "ICTAC 2020, p. 37, Online conference, Krakow, Poland",
title = "The kinetic study of juice industry residues drying process based on TG-DTG experimental data",
url = "https://hdl.handle.net/21.15107/rcub_machinery_7279"
}

Milanović, M., Komatina, M., Janković, B., Stojiljković, D.,& Manić, N.. (2021). The kinetic study of juice industry residues drying process based on TG-DTG experimental data. in ICTAC 2020, p. 37, Online conference, Krakow, Poland.
https://hdl.handle.net/21.15107/rcub_machinery_7279

Milanović M, Komatina M, Janković B, Stojiljković D, Manić N. The kinetic study of juice industry residues drying process based on TG-DTG experimental data. in ICTAC 2020, p. 37, Online conference, Krakow, Poland. 2021;.
https://hdl.handle.net/21.15107/rcub_machinery_7279 .

Milanović, Mihailo, Komatina, Mirko, Janković, Bojan, Stojiljković, Dragoslava, Manić, Nebojša, "The kinetic study of juice industry residues drying process based on TG-DTG experimental data" in ICTAC 2020, p. 37, Online conference, Krakow, Poland (2021),
https://hdl.handle.net/21.15107/rcub_machinery_7279 .

TY  - JOUR
AU  - Manić, Nebojša
AU  - Janković, Bojan
AU  - Stojiljković, Dragoslava
AU  - Radojević, Miloš
AU  - Somoza, B.C.
AU  - Medić, L.
PY  - 2021
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3662
AB  - Despite many advantages of the utilization of biomass as a renewable energy source, certain bottlenecks during biomass plant operation can be identified. Transport and collection of biomass as well as non-uniform material characteristics are issues related to decreasing efficiency of logistics and fuel manipulation which can also cause economic problems with biomass collection, transport, and storage. Since biomass is an especially reactive fuel, this has raised concerns over its safe handling and utilization. Fires, and sometimes explosions, are a risk during all stages of fuel production as well as during handling and utilization of the product. This paper presents a novel method for assessing ignition risk and provides a ranking of relative risk of ignition of biomass fuels. Tests within this method include physical and chemical properties of biomass, thermal analysis measurements, and the calculation procedure steps which were made using characteristic temperatures from thermogravimetry recordings. The results of thermogravimetry analysis were used for determination of tangent slope of the mass loss rate curves in devolatilization zone at considered heating rates for all tested samples. Linear interpolation of the data obtained by tangent slope analysis and used heating rates may provide unique straight line for each sample in the ignition testing. Thermogravimetry index of spontaneous ignition (TGspi) is obtained for all samples based on newly established formula. By varying gradient of linear dependence of self-heating coefficient against reference temperatures, mass and heat transfer limitations for various biomasses were discussed. The proposed method is accurate as well as relatively simple and quick, enabling determination of data necessary for design and application of appropriate measures to reduce fire and explosion hazard related to operation of biomass.
PB  - Elsevier Ltd
T2  - Cleaner Engineering and Technology
T1  - Self-ignition potential assessment for different biomass feedstocks based on the dynamic thermal analysis
VL  - 2
DO  - 10.1016/j.clet.2020.100040
ER  - 

@article{
author = "Manić, Nebojša and Janković, Bojan and Stojiljković, Dragoslava and Radojević, Miloš and Somoza, B.C. and Medić, L.",
year = "2021",
abstract = "Despite many advantages of the utilization of biomass as a renewable energy source, certain bottlenecks during biomass plant operation can be identified. Transport and collection of biomass as well as non-uniform material characteristics are issues related to decreasing efficiency of logistics and fuel manipulation which can also cause economic problems with biomass collection, transport, and storage. Since biomass is an especially reactive fuel, this has raised concerns over its safe handling and utilization. Fires, and sometimes explosions, are a risk during all stages of fuel production as well as during handling and utilization of the product. This paper presents a novel method for assessing ignition risk and provides a ranking of relative risk of ignition of biomass fuels. Tests within this method include physical and chemical properties of biomass, thermal analysis measurements, and the calculation procedure steps which were made using characteristic temperatures from thermogravimetry recordings. The results of thermogravimetry analysis were used for determination of tangent slope of the mass loss rate curves in devolatilization zone at considered heating rates for all tested samples. Linear interpolation of the data obtained by tangent slope analysis and used heating rates may provide unique straight line for each sample in the ignition testing. Thermogravimetry index of spontaneous ignition (TGspi) is obtained for all samples based on newly established formula. By varying gradient of linear dependence of self-heating coefficient against reference temperatures, mass and heat transfer limitations for various biomasses were discussed. The proposed method is accurate as well as relatively simple and quick, enabling determination of data necessary for design and application of appropriate measures to reduce fire and explosion hazard related to operation of biomass.",
publisher = "Elsevier Ltd",
journal = "Cleaner Engineering and Technology",
title = "Self-ignition potential assessment for different biomass feedstocks based on the dynamic thermal analysis",
volume = "2",
doi = "10.1016/j.clet.2020.100040"
}

Manić, N., Janković, B., Stojiljković, D., Radojević, M., Somoza, B.C.,& Medić, L.. (2021). Self-ignition potential assessment for different biomass feedstocks based on the dynamic thermal analysis. in Cleaner Engineering and Technology
Elsevier Ltd., 2.
https://doi.org/10.1016/j.clet.2020.100040

Manić N, Janković B, Stojiljković D, Radojević M, Somoza B, Medić L. Self-ignition potential assessment for different biomass feedstocks based on the dynamic thermal analysis. in Cleaner Engineering and Technology. 2021;2.
doi:10.1016/j.clet.2020.100040 .

Manić, Nebojša, Janković, Bojan, Stojiljković, Dragoslava, Radojević, Miloš, Somoza, B.C., Medić, L., "Self-ignition potential assessment for different biomass feedstocks based on the dynamic thermal analysis" in Cleaner Engineering and Technology, 2 (2021),
https://doi.org/10.1016/j.clet.2020.100040 . .

TY  - JOUR
AU  - Radojević, Miloš
AU  - Janković, Bojan
AU  - Stojiljković, Dragoslava
AU  - Jovanović, Vladimir
AU  - Ceković, Ivana
AU  - Manić, Nebojša
PY  - 2021
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3517
AB  - This paper provides in-depth knowledge about the evolved gas analysis interpretation via newly proposed semi-quantitative approach, arising from thermogravimetric analysis (TGA) - mass spectrometry (MS) coupled measurements, for studying pyrolysis behavior of three kinds of biomass waste materials (spent coffee grounds, beech sawdust and wheat straw). TGA - MS coupling allows accurate correlation between molecular ion peak and fragment peaks to the corresponding mass loss rates from derivative thermogravimetry curves. Within proposed semi-quantitative analysis, MS spectra were interpreted through the comparative analysis of compounds fragments and of the compound itself, where the single atomic mass unit was identified by multiple compounds exhibition. It was shown that by this procedure which involves overlapping multiple curves supervising, the identification of gases in volatiles complex scheme becomes more simplified. By setting up semi-quantitative formulas, easy and reliable calculations of gaseous products yield and syngas energy capacities are possible to achieve. The H-2/CO ratio derived from the proposed method for wood waste product (sawdust) is in an excellent agreement with H-2/CO ratio for sawdust syngas production, in fuel reactor for biomass gasification and H-2 production.
PB  - Elsevier, Amsterdam
T2  - Thermochimica Acta
T1  - Improved TGA-MS measurements for evolved gas analysis (EGA) during pyrolysis process of various biomass feedstocks. Syngas energy balance determination
VL  - 699
DO  - 10.1016/j.tca.2021.178912
ER  - 

@article{
author = "Radojević, Miloš and Janković, Bojan and Stojiljković, Dragoslava and Jovanović, Vladimir and Ceković, Ivana and Manić, Nebojša",
year = "2021",
abstract = "This paper provides in-depth knowledge about the evolved gas analysis interpretation via newly proposed semi-quantitative approach, arising from thermogravimetric analysis (TGA) - mass spectrometry (MS) coupled measurements, for studying pyrolysis behavior of three kinds of biomass waste materials (spent coffee grounds, beech sawdust and wheat straw). TGA - MS coupling allows accurate correlation between molecular ion peak and fragment peaks to the corresponding mass loss rates from derivative thermogravimetry curves. Within proposed semi-quantitative analysis, MS spectra were interpreted through the comparative analysis of compounds fragments and of the compound itself, where the single atomic mass unit was identified by multiple compounds exhibition. It was shown that by this procedure which involves overlapping multiple curves supervising, the identification of gases in volatiles complex scheme becomes more simplified. By setting up semi-quantitative formulas, easy and reliable calculations of gaseous products yield and syngas energy capacities are possible to achieve. The H-2/CO ratio derived from the proposed method for wood waste product (sawdust) is in an excellent agreement with H-2/CO ratio for sawdust syngas production, in fuel reactor for biomass gasification and H-2 production.",
publisher = "Elsevier, Amsterdam",
journal = "Thermochimica Acta",
title = "Improved TGA-MS measurements for evolved gas analysis (EGA) during pyrolysis process of various biomass feedstocks. Syngas energy balance determination",
volume = "699",
doi = "10.1016/j.tca.2021.178912"
}

Radojević, M., Janković, B., Stojiljković, D., Jovanović, V., Ceković, I.,& Manić, N.. (2021). Improved TGA-MS measurements for evolved gas analysis (EGA) during pyrolysis process of various biomass feedstocks. Syngas energy balance determination. in Thermochimica Acta
Elsevier, Amsterdam., 699.
https://doi.org/10.1016/j.tca.2021.178912

Radojević M, Janković B, Stojiljković D, Jovanović V, Ceković I, Manić N. Improved TGA-MS measurements for evolved gas analysis (EGA) during pyrolysis process of various biomass feedstocks. Syngas energy balance determination. in Thermochimica Acta. 2021;699.
doi:10.1016/j.tca.2021.178912 .

Radojević, Miloš, Janković, Bojan, Stojiljković, Dragoslava, Jovanović, Vladimir, Ceković, Ivana, Manić, Nebojša, "Improved TGA-MS measurements for evolved gas analysis (EGA) during pyrolysis process of various biomass feedstocks. Syngas energy balance determination" in Thermochimica Acta, 699 (2021),
https://doi.org/10.1016/j.tca.2021.178912 . .

TY  - JOUR
AU  - Manić, Nebojša
AU  - Janković, Bojan
AU  - Milović, Ljubica
AU  - Komatina, Mirko
AU  - Stojiljković, Dragoslava
PY  - 2021
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/92
AB  - This study presents the experimental results of the mechanical and thermophysical properties of wood pellet samples important for their utilization in pellet stoves and boilers for heat production. The impact of operational parameters during the production process on a single pelletizer unit for three typical domestic commercial wood pellet samples (PWP110, BWP110, and BWP140) on fuel particle mechanical characteristics and related thermal properties was analyzed. It was concluded that the changes in raw material selection, as well as related operating parameters (extrusion length, i.e., die temperature during production process), have influenced the key mechanical and thermal characteristics of tested commercial wood pellets. The presented results have indicated the existence of a thin solid layer (due to waxes and subsequently lignin coating layer behaviors depending on their glass transition temperatures) on the surface of the BWP140 pellet sample. This layer leads to increasing the thermal resistance in the considered sample which can be explained by decreasing the effective thermal conductivity. Also, the forming of this layer on the surface of the wood pellet sample was caused by the production process (high-temperature impact explained by increasing friction between the die and feedstock during pellets production). It could be related to a lower value of effective thermal conductivity and specific heat capacity for considered (Beech) wood pellet sample.
PB  - Springer Heidelberg, Heidelberg
T2  - Biomass Conversion and Biorefinery
T1  - The impact of production operating parameters on mechanical and thermophysical characteristics of commercial wood pellets
DO  - 10.1007/s13399-021-01609-4
ER  - 

@article{
author = "Manić, Nebojša and Janković, Bojan and Milović, Ljubica and Komatina, Mirko and Stojiljković, Dragoslava",
year = "2021",
abstract = "This study presents the experimental results of the mechanical and thermophysical properties of wood pellet samples important for their utilization in pellet stoves and boilers for heat production. The impact of operational parameters during the production process on a single pelletizer unit for three typical domestic commercial wood pellet samples (PWP110, BWP110, and BWP140) on fuel particle mechanical characteristics and related thermal properties was analyzed. It was concluded that the changes in raw material selection, as well as related operating parameters (extrusion length, i.e., die temperature during production process), have influenced the key mechanical and thermal characteristics of tested commercial wood pellets. The presented results have indicated the existence of a thin solid layer (due to waxes and subsequently lignin coating layer behaviors depending on their glass transition temperatures) on the surface of the BWP140 pellet sample. This layer leads to increasing the thermal resistance in the considered sample which can be explained by decreasing the effective thermal conductivity. Also, the forming of this layer on the surface of the wood pellet sample was caused by the production process (high-temperature impact explained by increasing friction between the die and feedstock during pellets production). It could be related to a lower value of effective thermal conductivity and specific heat capacity for considered (Beech) wood pellet sample.",
publisher = "Springer Heidelberg, Heidelberg",
journal = "Biomass Conversion and Biorefinery",
title = "The impact of production operating parameters on mechanical and thermophysical characteristics of commercial wood pellets",
doi = "10.1007/s13399-021-01609-4"
}

Manić, N., Janković, B., Milović, L., Komatina, M.,& Stojiljković, D.. (2021). The impact of production operating parameters on mechanical and thermophysical characteristics of commercial wood pellets. in Biomass Conversion and Biorefinery
Springer Heidelberg, Heidelberg..
https://doi.org/10.1007/s13399-021-01609-4

Manić N, Janković B, Milović L, Komatina M, Stojiljković D. The impact of production operating parameters on mechanical and thermophysical characteristics of commercial wood pellets. in Biomass Conversion and Biorefinery. 2021;.
doi:10.1007/s13399-021-01609-4 .

Manić, Nebojša, Janković, Bojan, Milović, Ljubica, Komatina, Mirko, Stojiljković, Dragoslava, "The impact of production operating parameters on mechanical and thermophysical characteristics of commercial wood pellets" in Biomass Conversion and Biorefinery (2021),
https://doi.org/10.1007/s13399-021-01609-4 . .

TY  - CONF
AU  - Veljković, Filip
AU  - Janković, Bojan
AU  - Manić, Nebojša
AU  - Radojević, Miloš
AU  - Stojiljković, Milovan
AU  - Stajčić, Ivana
AU  - Ćurčić, Milica
AU  - Veličković, Suzana
PY  - 2021
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/7245
AB  - One of the goals that mankind has set for 2050 is decarbonization in the energy sector. For that
reason, the use of hydrogen as an alternative fuel looks like a possible solution. However, the conventional
hydrogen production process (electrolysis) now indirectly accounts for more than 2% of
total global CO2 emissions. One of the scenarios to reaching set targets involves the decarbonization
of hydrogen production, resulting in green hydrogen. The one of the pathways for production of green
hydrogen is feasible within the gasification of lignocellulosic materials (biomass feedstock) into syngas.
However, different feedstock parameters have an impact on the thermochemical conversion process
i.e. syngas yield and composition. This paper presents the novel semi-quantitative analysis of
fundamental experimental data obtained by thermogravimetry and mass spectrometry. According to
the proposed methodology on the lab-scale level is possible to evaluate the feedstock quality for identification
of syngas yield and composition, with special attention to the hydrogen content in the syngas.
The experimental results for two biomass samples were presented and based on performed semiquantitative
analysis the evaluating of the possibilities for using considered feedstocks for green hydrogen
production was done. Further discussions and comparisons with literature data were also
presented.
PB  - Union of Mechanical and Electrotechnical Engineers and Technicians of Serbia (SMEITS) Society for Renewable Electrical Power Sources
C3  - Proceedings of 9th International Conference on Renewable Electrical Power Sources
T1  - A SEMI-QUANTITATIVE ANALYSIS FOR EVALUATING THE SUSTAINABLE GREEN HYDROGEN PRODUCTION BY BIOMASS GASIFICATION
T1  - SEMI-KVANTITATIVNA ANALIZA ZA PROCENU ODRŽIVE PROIZVODNJE ZELENOG VODONIKA GASIFIKACIJOM BIOMASE
EP  - 280
SP  - 273
UR  - https://hdl.handle.net/21.15107/rcub_machinery_7245
ER  - 

@conference{
author = "Veljković, Filip and Janković, Bojan and Manić, Nebojša and Radojević, Miloš and Stojiljković, Milovan and Stajčić, Ivana and Ćurčić, Milica and Veličković, Suzana",
year = "2021",
abstract = "One of the goals that mankind has set for 2050 is decarbonization in the energy sector. For that
reason, the use of hydrogen as an alternative fuel looks like a possible solution. However, the conventional
hydrogen production process (electrolysis) now indirectly accounts for more than 2% of
total global CO2 emissions. One of the scenarios to reaching set targets involves the decarbonization
of hydrogen production, resulting in green hydrogen. The one of the pathways for production of green
hydrogen is feasible within the gasification of lignocellulosic materials (biomass feedstock) into syngas.
However, different feedstock parameters have an impact on the thermochemical conversion process
i.e. syngas yield and composition. This paper presents the novel semi-quantitative analysis of
fundamental experimental data obtained by thermogravimetry and mass spectrometry. According to
the proposed methodology on the lab-scale level is possible to evaluate the feedstock quality for identification
of syngas yield and composition, with special attention to the hydrogen content in the syngas.
The experimental results for two biomass samples were presented and based on performed semiquantitative
analysis the evaluating of the possibilities for using considered feedstocks for green hydrogen
production was done. Further discussions and comparisons with literature data were also
presented.",
publisher = "Union of Mechanical and Electrotechnical Engineers and Technicians of Serbia (SMEITS) Society for Renewable Electrical Power Sources",
journal = "Proceedings of 9th International Conference on Renewable Electrical Power Sources",
title = "A SEMI-QUANTITATIVE ANALYSIS FOR EVALUATING THE SUSTAINABLE GREEN HYDROGEN PRODUCTION BY BIOMASS GASIFICATION, SEMI-KVANTITATIVNA ANALIZA ZA PROCENU ODRŽIVE PROIZVODNJE ZELENOG VODONIKA GASIFIKACIJOM BIOMASE",
pages = "280-273",
url = "https://hdl.handle.net/21.15107/rcub_machinery_7245"
}

Veljković, F., Janković, B., Manić, N., Radojević, M., Stojiljković, M., Stajčić, I., Ćurčić, M.,& Veličković, S.. (2021). A SEMI-QUANTITATIVE ANALYSIS FOR EVALUATING THE SUSTAINABLE GREEN HYDROGEN PRODUCTION BY BIOMASS GASIFICATION. in Proceedings of 9th International Conference on Renewable Electrical Power Sources
Union of Mechanical and Electrotechnical Engineers and Technicians of Serbia (SMEITS) Society for Renewable Electrical Power Sources., 273-280.
https://hdl.handle.net/21.15107/rcub_machinery_7245

Veljković F, Janković B, Manić N, Radojević M, Stojiljković M, Stajčić I, Ćurčić M, Veličković S. A SEMI-QUANTITATIVE ANALYSIS FOR EVALUATING THE SUSTAINABLE GREEN HYDROGEN PRODUCTION BY BIOMASS GASIFICATION. in Proceedings of 9th International Conference on Renewable Electrical Power Sources. 2021;:273-280.
https://hdl.handle.net/21.15107/rcub_machinery_7245 .

Veljković, Filip, Janković, Bojan, Manić, Nebojša, Radojević, Miloš, Stojiljković, Milovan, Stajčić, Ivana, Ćurčić, Milica, Veličković, Suzana, "A SEMI-QUANTITATIVE ANALYSIS FOR EVALUATING THE SUSTAINABLE GREEN HYDROGEN PRODUCTION BY BIOMASS GASIFICATION" in Proceedings of 9th International Conference on Renewable Electrical Power Sources (2021):273-280,
https://hdl.handle.net/21.15107/rcub_machinery_7245 .

TY  - JOUR
AU  - Janković, Bojan
AU  - Manić, Nebojša
AU  - Dodevski, Vladimir
PY  - 2021
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3605
AB  - This paper provides insights into understanding the physical and chemical changes that take place during reheating process of Poplar fluff bio-char derived by carbonization at high operating temperature (850 ?C). Biochar re-heating experiments were performed by simultaneous TGA-DTG-DSC techniques in N2 atmosphere at 5, 10, 15 and 20 ?C min- 1. Kinetic modeling of the process was done through implementation of model-free and model-based approaches. It was identified that re-heating process contains two stages. The first was described by single consecutive reaction step (up to 200 ?C) which is attributed to removal of physisorbed moisture at surface and in pores of carbonized material, while second was described by multiple reactions, including one consecutive step and two competitive steps. In the last, consecutive pathway includes reduction of PAH compounds (400?600 ?C) into smaller ones, changing degree of condensation of carbon structure continuously. Competitive steps encompass competition between C10H8 (naphthalene) (700?780 ?C) and C9H8 (indene) (700?750 ?C) molecules decomposition. It was found that used heating rates have great influence on regulating the amount of gaseous (combustible) products from these reactions. It was established that internal heat and mass transfer processes control the release of products. Changing the pyrolysis mechanism with temperature of carbonized biochar is the main factor for occurrence of true kinetic compensation effect, which is also discussed by applied isothermal life-time analysis.
PB  - Elsevier Sci Ltd, Oxford
T2  - Fuel
T1  - Pyrolysis kinetics of Poplar fluff bio-char produced at high carbonization temperature: A mechanistic study and isothermal life-time prediction
VL  - 296
DO  - 10.1016/j.fuel.2021.120637
ER  - 

@article{
author = "Janković, Bojan and Manić, Nebojša and Dodevski, Vladimir",
year = "2021",
abstract = "This paper provides insights into understanding the physical and chemical changes that take place during reheating process of Poplar fluff bio-char derived by carbonization at high operating temperature (850 ?C). Biochar re-heating experiments were performed by simultaneous TGA-DTG-DSC techniques in N2 atmosphere at 5, 10, 15 and 20 ?C min- 1. Kinetic modeling of the process was done through implementation of model-free and model-based approaches. It was identified that re-heating process contains two stages. The first was described by single consecutive reaction step (up to 200 ?C) which is attributed to removal of physisorbed moisture at surface and in pores of carbonized material, while second was described by multiple reactions, including one consecutive step and two competitive steps. In the last, consecutive pathway includes reduction of PAH compounds (400?600 ?C) into smaller ones, changing degree of condensation of carbon structure continuously. Competitive steps encompass competition between C10H8 (naphthalene) (700?780 ?C) and C9H8 (indene) (700?750 ?C) molecules decomposition. It was found that used heating rates have great influence on regulating the amount of gaseous (combustible) products from these reactions. It was established that internal heat and mass transfer processes control the release of products. Changing the pyrolysis mechanism with temperature of carbonized biochar is the main factor for occurrence of true kinetic compensation effect, which is also discussed by applied isothermal life-time analysis.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Fuel",
title = "Pyrolysis kinetics of Poplar fluff bio-char produced at high carbonization temperature: A mechanistic study and isothermal life-time prediction",
volume = "296",
doi = "10.1016/j.fuel.2021.120637"
}

Janković, B., Manić, N.,& Dodevski, V.. (2021). Pyrolysis kinetics of Poplar fluff bio-char produced at high carbonization temperature: A mechanistic study and isothermal life-time prediction. in Fuel
Elsevier Sci Ltd, Oxford., 296.
https://doi.org/10.1016/j.fuel.2021.120637

Janković B, Manić N, Dodevski V. Pyrolysis kinetics of Poplar fluff bio-char produced at high carbonization temperature: A mechanistic study and isothermal life-time prediction. in Fuel. 2021;296.
doi:10.1016/j.fuel.2021.120637 .

Janković, Bojan, Manić, Nebojša, Dodevski, Vladimir, "Pyrolysis kinetics of Poplar fluff bio-char produced at high carbonization temperature: A mechanistic study and isothermal life-time prediction" in Fuel, 296 (2021),
https://doi.org/10.1016/j.fuel.2021.120637 . .

TY  - JOUR
AU  - Manić, Nebojša
AU  - Janković, Bojan
AU  - Dodevski, Vladimir
PY  - 2021
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3559
AB  - As representative among biomass feedstocks, Poplar fluff was chosen to analyze the pyrolysis properties of this new biofuel. Thermogravimetry under inert (argon) atmosphere at the heating rates of 5, 10, 15, and 20 degrees C min(-1)was employed in the investigation of thermal processing of studied biomass. The determination of kinetic parameters and estimation of reaction mechanism function were done through application of the state-of-the-art NETZSCH Kinetics NEO software. With this aim, the various model-free models and model-based calculations were implemented. The obtained results showed that the most appropriate kinetic model to describe the thermal decomposition of Poplar fluff sample wasn-dimensional acceleratory Avrami-Erofeev model (An) for three-step consecutive reaction mechanism. Governed reaction pathway in pyrolysis process represents fragmentation reactions which arise from levoglucosan decomposing that permits permanent gases and refractory tars, where diffusion-controlled process is involved in the sample devolatilization. The modulated and multiple-step predictions of pyrolysis process were also carried out.
PB  - Springer, Dordrecht
T2  - Journal of Thermal Analysis and Calorimetry
T1  - Model-free and model-based kinetic analysis of Poplar fluff (Populus alba) pyrolysis process under dynamic conditions
EP  - 3438
IS  - 5
SP  - 3419
VL  - 143
DO  - 10.1007/s10973-020-09675-y
ER  - 

@article{
author = "Manić, Nebojša and Janković, Bojan and Dodevski, Vladimir",
year = "2021",
abstract = "As representative among biomass feedstocks, Poplar fluff was chosen to analyze the pyrolysis properties of this new biofuel. Thermogravimetry under inert (argon) atmosphere at the heating rates of 5, 10, 15, and 20 degrees C min(-1)was employed in the investigation of thermal processing of studied biomass. The determination of kinetic parameters and estimation of reaction mechanism function were done through application of the state-of-the-art NETZSCH Kinetics NEO software. With this aim, the various model-free models and model-based calculations were implemented. The obtained results showed that the most appropriate kinetic model to describe the thermal decomposition of Poplar fluff sample wasn-dimensional acceleratory Avrami-Erofeev model (An) for three-step consecutive reaction mechanism. Governed reaction pathway in pyrolysis process represents fragmentation reactions which arise from levoglucosan decomposing that permits permanent gases and refractory tars, where diffusion-controlled process is involved in the sample devolatilization. The modulated and multiple-step predictions of pyrolysis process were also carried out.",
publisher = "Springer, Dordrecht",
journal = "Journal of Thermal Analysis and Calorimetry",
title = "Model-free and model-based kinetic analysis of Poplar fluff (Populus alba) pyrolysis process under dynamic conditions",
pages = "3438-3419",
number = "5",
volume = "143",
doi = "10.1007/s10973-020-09675-y"
}

Manić, N., Janković, B.,& Dodevski, V.. (2021). Model-free and model-based kinetic analysis of Poplar fluff (Populus alba) pyrolysis process under dynamic conditions. in Journal of Thermal Analysis and Calorimetry
Springer, Dordrecht., 143(5), 3419-3438.
https://doi.org/10.1007/s10973-020-09675-y

Manić N, Janković B, Dodevski V. Model-free and model-based kinetic analysis of Poplar fluff (Populus alba) pyrolysis process under dynamic conditions. in Journal of Thermal Analysis and Calorimetry. 2021;143(5):3419-3438.
doi:10.1007/s10973-020-09675-y .

Manić, Nebojša, Janković, Bojan, Dodevski, Vladimir, "Model-free and model-based kinetic analysis of Poplar fluff (Populus alba) pyrolysis process under dynamic conditions" in Journal of Thermal Analysis and Calorimetry, 143, no. 5 (2021):3419-3438,
https://doi.org/10.1007/s10973-020-09675-y . .

TY  - JOUR
AU  - Janković, Bojan
AU  - Manić, Nebojša
PY  - 2021
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3549
AB  - This study provides new information on the thermal stability and kinetics of pyrolysis of commonly used resins in solid-phase peptide synthesis. Pyrolysis process of 4-benzyloxybenzyl alcohol resin was monitored by simultaneous TGA-DTG measurements in a nitrogen atmosphere, at four different heating rates (5, 10, 20 and 30 K min(-1)). Kinetic computations included the model-free (isoconversional) and model-based methods for reliable estimation of kinetic parameters and the mechanism of investigated process. Based on the findings from applied methods, the pyrolysis process can be described by three reaction steps, where one of them encompasses the consecutive reactions. The first step (n-th order reaction, referred to Fn) is attributed to the random scission of the main chain in PS (polystyrene) solid support, where polymer radicals were formed. The second step proceeds through homolytic cleavage path of ether linkage of the resin (by the first-order reaction, referred to F1) and then via phenoxy radical (semiquinone) formation which is converted into the benzoquinone through a dehydrogenation (by autocatalysis reaction, referred to Cnm). Finally, the third step (referred to Fn reaction) was characterized by depolymerization mechanism, which takes place at higher temperatures (T > 385 degrees C). With determined kinetic parameters and the most probable mechanism functions, the model agrees excellently with experimental data. By applying the obtained kinetic results, isothermal life-time prediction was also performed.
PB  - Elsevier Sci Ltd, Oxford
T2  - Polymer Degradation and Stability
T1  - Kinetic analysis and reaction mechanism of p-alkoxybenzyl alcohol ([4-(hydroxymethyl)phenoxymethyl]polystyrene) resin pyrolysis: Revealing new information on thermal stability
VL  - 189
DO  - 10.1016/j.polymdegradstab.2021.109606
ER  - 

@article{
author = "Janković, Bojan and Manić, Nebojša",
year = "2021",
abstract = "This study provides new information on the thermal stability and kinetics of pyrolysis of commonly used resins in solid-phase peptide synthesis. Pyrolysis process of 4-benzyloxybenzyl alcohol resin was monitored by simultaneous TGA-DTG measurements in a nitrogen atmosphere, at four different heating rates (5, 10, 20 and 30 K min(-1)). Kinetic computations included the model-free (isoconversional) and model-based methods for reliable estimation of kinetic parameters and the mechanism of investigated process. Based on the findings from applied methods, the pyrolysis process can be described by three reaction steps, where one of them encompasses the consecutive reactions. The first step (n-th order reaction, referred to Fn) is attributed to the random scission of the main chain in PS (polystyrene) solid support, where polymer radicals were formed. The second step proceeds through homolytic cleavage path of ether linkage of the resin (by the first-order reaction, referred to F1) and then via phenoxy radical (semiquinone) formation which is converted into the benzoquinone through a dehydrogenation (by autocatalysis reaction, referred to Cnm). Finally, the third step (referred to Fn reaction) was characterized by depolymerization mechanism, which takes place at higher temperatures (T > 385 degrees C). With determined kinetic parameters and the most probable mechanism functions, the model agrees excellently with experimental data. By applying the obtained kinetic results, isothermal life-time prediction was also performed.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Polymer Degradation and Stability",
title = "Kinetic analysis and reaction mechanism of p-alkoxybenzyl alcohol ([4-(hydroxymethyl)phenoxymethyl]polystyrene) resin pyrolysis: Revealing new information on thermal stability",
volume = "189",
doi = "10.1016/j.polymdegradstab.2021.109606"
}

Janković, B.,& Manić, N.. (2021). Kinetic analysis and reaction mechanism of p-alkoxybenzyl alcohol ([4-(hydroxymethyl)phenoxymethyl]polystyrene) resin pyrolysis: Revealing new information on thermal stability. in Polymer Degradation and Stability
Elsevier Sci Ltd, Oxford., 189.
https://doi.org/10.1016/j.polymdegradstab.2021.109606

Janković B, Manić N. Kinetic analysis and reaction mechanism of p-alkoxybenzyl alcohol ([4-(hydroxymethyl)phenoxymethyl]polystyrene) resin pyrolysis: Revealing new information on thermal stability. in Polymer Degradation and Stability. 2021;189.
doi:10.1016/j.polymdegradstab.2021.109606 .

Janković, Bojan, Manić, Nebojša, "Kinetic analysis and reaction mechanism of p-alkoxybenzyl alcohol ([4-(hydroxymethyl)phenoxymethyl]polystyrene) resin pyrolysis: Revealing new information on thermal stability" in Polymer Degradation and Stability, 189 (2021),
https://doi.org/10.1016/j.polymdegradstab.2021.109606 . .

TY  - JOUR
AU  - Janković, Bojan
AU  - Manić, Nebojša
PY  - 2021
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3502
AB  - Thermally accelerated oxidative degradation of wolfberry pulp was kinetically monitored using model-free and model-based approaches. Kinetic calculations were performed based on simultaneous thermal analysis measurements in an air at four different heating rates. From kinetic analysis, new developed mechanistic scheme which is responsible for wolfberries anti-oxidative behavior was proposed. It was found that thermo-oxidative process proceeds through multiplestep mechanism including sum of two independent reaction sets, via consecutive and competitive steps. It was established that rutoside degradation pathway to flavonol through hydrolysis reaction is rate-determining step of considered process. Furthermore, it was found that key flavonol compound degraded by competitive reactions mechanism forming such kinetic branches, which lead to compounds responsible for wolfberries antioxidant activity. It was established that flavonol oxidative cleavage reaction and oxidative polymerization are main chemical routes which are very important in a complex antioxidant mechanism for scavenging free radicals in wolfberries oxidative stress response.
PB  - Elsevier Sci Ltd, Oxford
T2  - Food Chemistry
T1  - Model-free and model-based analysis of thermo-oxidative response of wolfberries: A new developed mechanistic scheme
VL  - 343
DO  - 10.1016/j.foodchem.2020.128530
ER  - 

@article{
author = "Janković, Bojan and Manić, Nebojša",
year = "2021",
abstract = "Thermally accelerated oxidative degradation of wolfberry pulp was kinetically monitored using model-free and model-based approaches. Kinetic calculations were performed based on simultaneous thermal analysis measurements in an air at four different heating rates. From kinetic analysis, new developed mechanistic scheme which is responsible for wolfberries anti-oxidative behavior was proposed. It was found that thermo-oxidative process proceeds through multiplestep mechanism including sum of two independent reaction sets, via consecutive and competitive steps. It was established that rutoside degradation pathway to flavonol through hydrolysis reaction is rate-determining step of considered process. Furthermore, it was found that key flavonol compound degraded by competitive reactions mechanism forming such kinetic branches, which lead to compounds responsible for wolfberries antioxidant activity. It was established that flavonol oxidative cleavage reaction and oxidative polymerization are main chemical routes which are very important in a complex antioxidant mechanism for scavenging free radicals in wolfberries oxidative stress response.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Food Chemistry",
title = "Model-free and model-based analysis of thermo-oxidative response of wolfberries: A new developed mechanistic scheme",
volume = "343",
doi = "10.1016/j.foodchem.2020.128530"
}

Janković, B.,& Manić, N.. (2021). Model-free and model-based analysis of thermo-oxidative response of wolfberries: A new developed mechanistic scheme. in Food Chemistry
Elsevier Sci Ltd, Oxford., 343.
https://doi.org/10.1016/j.foodchem.2020.128530

Janković B, Manić N. Model-free and model-based analysis of thermo-oxidative response of wolfberries: A new developed mechanistic scheme. in Food Chemistry. 2021;343.
doi:10.1016/j.foodchem.2020.128530 .

Janković, Bojan, Manić, Nebojša, "Model-free and model-based analysis of thermo-oxidative response of wolfberries: A new developed mechanistic scheme" in Food Chemistry, 343 (2021),
https://doi.org/10.1016/j.foodchem.2020.128530 . .

TY  - CONF
AU  - Manić, Nebojša
AU  - Janković, Bojan
AU  - Stojiljković, Dragoslava
AU  - Radojević, Miloš
AU  - Castels Somoza, Blanca
AU  - Medić, Ljiljana
PY  - 2020
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/7249
AB  - Despite many advantages of the u tilization of biomass a s a r enewable energy source, certain
bot t lenecks during biomass plant operation can be identified. Div ersity in space, periodicity of
biomass collection and non-uniform material characteristics a r e issues r elated to decr easing
efficiency of logistics and fu el manipulation which can a lso cause economic problems with
biomass collection, transport, and storage. Since biomass is an especially reactive fuel, this has
r a ised concerns ov er its safe handling and utilization. Fires, and sometimes explosions, are a risk
du r ing all stages of fuel production a s well a s during handling and utilization of the product. This
paper presents a nov el method for assessing ignition risk and prov ides a ranking of the relative
r isk of ignition of biomass fu els. Tests within this method include physical and chemical
properties of biomass, thermal analysis (TA) measurements, and the calculation procedure steps
which were made using characteristic temperatures from thermogravimetry (TG) recordings. The
TG r esults were used for the determination of the tangent slope of the mass loss rate curves in the
dev olatilization zone at considered heating rates for all tested samples. Linear interpolation of the
da ta obtained by tangent slope analysis and used heating rates may prov ide a unique straight line
for ea ch sample in the ignition testing. TG index of spontaneous ignition (TG spi) is obtained for all
samples based on a newly established formula. By v arying gradient of linear dependence of selfhea
ting coefficient against reference temperatures (Tref,i), mass and heat transfer limitations for
v arious biomasses were discussed. The proposed method is accurate as well as relatively simple
and quick, enabling determination of data necessary for the design and application of appropriate
mea su r es to r edu ce fir e and explosion ha za rds r ela ted to the oper a t ion of bioma ss.
PB  - SDEWES - International Centre for Sustainable Development of Energy, Water and Environment Systems
PB  - Faculty of Mechanical Engineering and Naval Architecture, Zagreb
C3  - Book of Abstracts 4th SEE SDEWES Conference Sarajevo 2020
T1  - The Application of a Novel Methodology for the Determination of Biomass Spontaneous Ignition
IS  - SEE.SDEWES2020.0220
UR  - https://hdl.handle.net/21.15107/rcub_machinery_7249
ER  - 

@conference{
author = "Manić, Nebojša and Janković, Bojan and Stojiljković, Dragoslava and Radojević, Miloš and Castels Somoza, Blanca and Medić, Ljiljana",
year = "2020",
abstract = "Despite many advantages of the u tilization of biomass a s a r enewable energy source, certain
bot t lenecks during biomass plant operation can be identified. Div ersity in space, periodicity of
biomass collection and non-uniform material characteristics a r e issues r elated to decr easing
efficiency of logistics and fu el manipulation which can a lso cause economic problems with
biomass collection, transport, and storage. Since biomass is an especially reactive fuel, this has
r a ised concerns ov er its safe handling and utilization. Fires, and sometimes explosions, are a risk
du r ing all stages of fuel production a s well a s during handling and utilization of the product. This
paper presents a nov el method for assessing ignition risk and prov ides a ranking of the relative
r isk of ignition of biomass fu els. Tests within this method include physical and chemical
properties of biomass, thermal analysis (TA) measurements, and the calculation procedure steps
which were made using characteristic temperatures from thermogravimetry (TG) recordings. The
TG r esults were used for the determination of the tangent slope of the mass loss rate curves in the
dev olatilization zone at considered heating rates for all tested samples. Linear interpolation of the
da ta obtained by tangent slope analysis and used heating rates may prov ide a unique straight line
for ea ch sample in the ignition testing. TG index of spontaneous ignition (TG spi) is obtained for all
samples based on a newly established formula. By v arying gradient of linear dependence of selfhea
ting coefficient against reference temperatures (Tref,i), mass and heat transfer limitations for
v arious biomasses were discussed. The proposed method is accurate as well as relatively simple
and quick, enabling determination of data necessary for the design and application of appropriate
mea su r es to r edu ce fir e and explosion ha za rds r ela ted to the oper a t ion of bioma ss.",
publisher = "SDEWES - International Centre for Sustainable Development of Energy, Water and Environment Systems, Faculty of Mechanical Engineering and Naval Architecture, Zagreb",
journal = "Book of Abstracts 4th SEE SDEWES Conference Sarajevo 2020",
title = "The Application of a Novel Methodology for the Determination of Biomass Spontaneous Ignition",
number = "SEE.SDEWES2020.0220",
url = "https://hdl.handle.net/21.15107/rcub_machinery_7249"
}

Manić, N., Janković, B., Stojiljković, D., Radojević, M., Castels Somoza, B.,& Medić, L.. (2020). The Application of a Novel Methodology for the Determination of Biomass Spontaneous Ignition. in Book of Abstracts 4th SEE SDEWES Conference Sarajevo 2020
SDEWES - International Centre for Sustainable Development of Energy, Water and Environment Systems.(SEE.SDEWES2020.0220).
https://hdl.handle.net/21.15107/rcub_machinery_7249

Manić N, Janković B, Stojiljković D, Radojević M, Castels Somoza B, Medić L. The Application of a Novel Methodology for the Determination of Biomass Spontaneous Ignition. in Book of Abstracts 4th SEE SDEWES Conference Sarajevo 2020. 2020;(SEE.SDEWES2020.0220).
https://hdl.handle.net/21.15107/rcub_machinery_7249 .

Manić, Nebojša, Janković, Bojan, Stojiljković, Dragoslava, Radojević, Miloš, Castels Somoza, Blanca, Medić, Ljiljana, "The Application of a Novel Methodology for the Determination of Biomass Spontaneous Ignition" in Book of Abstracts 4th SEE SDEWES Conference Sarajevo 2020, no. SEE.SDEWES2020.0220 (2020),
https://hdl.handle.net/21.15107/rcub_machinery_7249 .