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  - JOUR
AU  - Janković, Bojan
AU  - Manić, Nebojša
AU  - Radović, Ivana
AU  - Janković, Marija
AU  - Rajacić, Milica
PY  - 2019
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3024
AB  - Thermal and kinetics behaviors of the low-rank coals from different annual periods (Kolubara (2015)/(2018) and TENT A (2015)/(2018)) during combustion process in air atmosphere, using simultaneous TGA-DTG-DTA-MS measurements were investigated. The FTIR spectroscopy was used to gain additional information on coals structures. Kolubara and TENT A coals from (2015)/(2018) annual periods show differences in reactivity, where the reason for this demeanor lies in differences in decomposition kinetics of these coals. The conclusions made on the basis of model-based analysis clearly indicate that differences in combustion reaction pathways (especially in transitions from primary to secondary combustion stages) arise from continual changes in physical structure of the coals. It was found that the mineral matter significantly influences on the reactivity of coal during combustion, where this is particularly pronounced for TENT A coal particles.
PB  - Elsevier, Amsterdam
T2  - Thermochimica Acta
T1  - Model-free and model-based kinetics of the combustion process of low rank coals with high ash contents using TGA-DTG-DTA-MS and FTIR techniques
VL  - 679
DO  - 10.1016/j.tca.2019.178337
ER  - 

@article{
author = "Janković, Bojan and Manić, Nebojša and Radović, Ivana and Janković, Marija and Rajacić, Milica",
year = "2019",
abstract = "Thermal and kinetics behaviors of the low-rank coals from different annual periods (Kolubara (2015)/(2018) and TENT A (2015)/(2018)) during combustion process in air atmosphere, using simultaneous TGA-DTG-DTA-MS measurements were investigated. The FTIR spectroscopy was used to gain additional information on coals structures. Kolubara and TENT A coals from (2015)/(2018) annual periods show differences in reactivity, where the reason for this demeanor lies in differences in decomposition kinetics of these coals. The conclusions made on the basis of model-based analysis clearly indicate that differences in combustion reaction pathways (especially in transitions from primary to secondary combustion stages) arise from continual changes in physical structure of the coals. It was found that the mineral matter significantly influences on the reactivity of coal during combustion, where this is particularly pronounced for TENT A coal particles.",
publisher = "Elsevier, Amsterdam",
journal = "Thermochimica Acta",
title = "Model-free and model-based kinetics of the combustion process of low rank coals with high ash contents using TGA-DTG-DTA-MS and FTIR techniques",
volume = "679",
doi = "10.1016/j.tca.2019.178337"
}

Janković, B., Manić, N., Radović, I., Janković, M.,& Rajacić, M.. (2019). Model-free and model-based kinetics of the combustion process of low rank coals with high ash contents using TGA-DTG-DTA-MS and FTIR techniques. in Thermochimica Acta
Elsevier, Amsterdam., 679.
https://doi.org/10.1016/j.tca.2019.178337

Janković B, Manić N, Radović I, Janković M, Rajacić M. Model-free and model-based kinetics of the combustion process of low rank coals with high ash contents using TGA-DTG-DTA-MS and FTIR techniques. in Thermochimica Acta. 2019;679.
doi:10.1016/j.tca.2019.178337 .

Janković, Bojan, Manić, Nebojša, Radović, Ivana, Janković, Marija, Rajacić, Milica, "Model-free and model-based kinetics of the combustion process of low rank coals with high ash contents using TGA-DTG-DTA-MS and FTIR techniques" in Thermochimica Acta, 679 (2019),
https://doi.org/10.1016/j.tca.2019.178337 . .