Recovering of metals and metal oxides through thermal decomposition process of coal bottom ash: a comprehensive kinetic analysis
Само за регистроване кориснике
2023
Аутори
Janković, BojanJanković, Marija
Krneta Nikolić, Jelena
Rajačić, Milica
Vukanac, Ivana
Sarap, Nataša
Manić, Nebojša
Конференцијски прилог (Објављена верзија)
,
© Akadémiai Kiadó, Budapest, 2023
Метаподаци
Приказ свих података о документуАпстракт
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 consecu...tive 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.
Кључне речи:
bottom ash / TG-DTG / metals recovery / kinetic analysis / catalystИзвор:
JTACC 2023, 2023, 263-Издавач:
- Budapest : Akadémiai Kiadó
Финансирање / пројекти:
- Министарство науке, технолошког развоја и иновација Републике Србије, институционално финансирање - 200105 (Универзитет у Београду, Машински факултет) (RS-MESTD-inst-2020-200105)
Колекције
Институција/група
Mašinski fakultetTY - 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 .