CO2 gasification of Argentinean coal chars: A kinetic characterization

A kinetic characterization of the CO2 gasification of chars from Argentinean low-rank coals, subbituminous (SB) and high volatile bituminous (HVB), is performed by isothermal thermogravimetry. Temperatures in the range 1173-1433 K and CO2 concentrations among 50% and 70% v/v are employed. Experiment...

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Detalles Bibliográficos
Autores principales:	Ochoa, J., Cassanello, M.C., Bonelli, P.R., Cukierman, A.L.
Formato:	JOUR
Materias:	Argentinean coal chars CO2 gasification kinetics Coal char gasification Random pore models Bituminous coal Carbon dioxide Catalyst activity Coal gasification Microporosity Thermogravimetric analysis Charcoal
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_03783820_v74_n3_p161_Ochoa
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	todo:paper_03783820_v74_n3_p161_Ochoa
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spelling	todo:paper_03783820_v74_n3_p161_Ochoa2023-10-03T15:32:18Z CO2 gasification of Argentinean coal chars: A kinetic characterization Ochoa, J. Cassanello, M.C. Bonelli, P.R. Cukierman, A.L. Argentinean coal chars CO2 gasification kinetics Coal char gasification Random pore models Bituminous coal Carbon dioxide Catalyst activity Coal gasification Microporosity Thermogravimetric analysis Coal char gasification Charcoal A kinetic characterization of the CO2 gasification of chars from Argentinean low-rank coals, subbituminous (SB) and high volatile bituminous (HVB), is performed by isothermal thermogravimetry. Temperatures in the range 1173-1433 K and CO2 concentrations among 50% and 70% v/v are employed. Experimental data obtained for both chars for the whole range of experimental conditions explored were satisfactorily described by a single master curve. Reactivity differences between chars are discussed in terms of carbon content, microporosity and crystallinity of the char carbonaceous part. In addition, potential catalytic effects of inherent minerals on chars gasification reactivity are examined by demineralizing the chars. For the subbituminous char, catalytic effects due to mineral matter content are detected up to 1333 K, whereas at higher temperatures they become considerably less pronounced. For the bituminous char, reactivity seems to depend more on structural and textural features than on catalysis over the whole range of operating conditions. Intrinsic gasification rates for both chars are properly represented by the well-known random capillary and random pore models (RPM). Recent models based on modifications introduced to the latter are also applied and kinetic data description is discussed. © 2001 Elsevier Science B.V. All rights reserved. Fil:Ochoa, J. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Cassanello, M.C. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Bonelli, P.R. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Cukierman, A.L. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_03783820_v74_n3_p161_Ochoa
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Argentinean coal chars CO2 gasification kinetics Coal char gasification Random pore models Bituminous coal Carbon dioxide Catalyst activity Coal gasification Microporosity Thermogravimetric analysis Coal char gasification Charcoal
spellingShingle	Argentinean coal chars CO2 gasification kinetics Coal char gasification Random pore models Bituminous coal Carbon dioxide Catalyst activity Coal gasification Microporosity Thermogravimetric analysis Coal char gasification Charcoal Ochoa, J. Cassanello, M.C. Bonelli, P.R. Cukierman, A.L. CO2 gasification of Argentinean coal chars: A kinetic characterization
topic_facet	Argentinean coal chars CO2 gasification kinetics Coal char gasification Random pore models Bituminous coal Carbon dioxide Catalyst activity Coal gasification Microporosity Thermogravimetric analysis Coal char gasification Charcoal
description	A kinetic characterization of the CO2 gasification of chars from Argentinean low-rank coals, subbituminous (SB) and high volatile bituminous (HVB), is performed by isothermal thermogravimetry. Temperatures in the range 1173-1433 K and CO2 concentrations among 50% and 70% v/v are employed. Experimental data obtained for both chars for the whole range of experimental conditions explored were satisfactorily described by a single master curve. Reactivity differences between chars are discussed in terms of carbon content, microporosity and crystallinity of the char carbonaceous part. In addition, potential catalytic effects of inherent minerals on chars gasification reactivity are examined by demineralizing the chars. For the subbituminous char, catalytic effects due to mineral matter content are detected up to 1333 K, whereas at higher temperatures they become considerably less pronounced. For the bituminous char, reactivity seems to depend more on structural and textural features than on catalysis over the whole range of operating conditions. Intrinsic gasification rates for both chars are properly represented by the well-known random capillary and random pore models (RPM). Recent models based on modifications introduced to the latter are also applied and kinetic data description is discussed. © 2001 Elsevier Science B.V. All rights reserved.
format	JOUR
author	Ochoa, J. Cassanello, M.C. Bonelli, P.R. Cukierman, A.L.
author_facet	Ochoa, J. Cassanello, M.C. Bonelli, P.R. Cukierman, A.L.
author_sort	Ochoa, J.
title	CO2 gasification of Argentinean coal chars: A kinetic characterization
title_short	CO2 gasification of Argentinean coal chars: A kinetic characterization
title_full	CO2 gasification of Argentinean coal chars: A kinetic characterization
title_fullStr	CO2 gasification of Argentinean coal chars: A kinetic characterization
title_full_unstemmed	CO2 gasification of Argentinean coal chars: A kinetic characterization
title_sort	co2 gasification of argentinean coal chars: a kinetic characterization
url	http://hdl.handle.net/20.500.12110/paper_03783820_v74_n3_p161_Ochoa
work_keys_str_mv	AT ochoaj co2gasificationofargentineancoalcharsakineticcharacterization AT cassanellomc co2gasificationofargentineancoalcharsakineticcharacterization AT bonellipr co2gasificationofargentineancoalcharsakineticcharacterization AT cukiermanal co2gasificationofargentineancoalcharsakineticcharacterization
_version_	1782029693070868480

CO2 gasification of Argentinean coal chars: A kinetic characterization

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