Detailed kinetic analysis and modelling of the dry gasification reaction of olive kernel and lignite coal chars

The dry gasification process of solid fuels is a promising pathway to mitigate and utilize captured CO2 emissions toward syngas generation with tailored composition for several downstream energy conversion and chemical production processes. In the present work, comprehensive kinetic analysis and rea...

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Autores: Lampropoulos, Athanasios, Varvoutis, Georgios, Montes Morán, Miguel Ángel, Menéndez Díaz, José Ángel, Konsolakis, Michalis, Marnellos, George E.
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2023
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/342729
Acceso en línea:http://hdl.handle.net/10261/342729
https://api.elsevier.com/content/abstract/scopus_id/85138132996
Access Level:acceso abierto
Palabra clave:Olive kernel char
CO2 gasification reactivity
Lignite coal char
Mechanistic considerations
Model-free kinetic analysis
http://metadata.un.org/sdg/7
http://metadata.un.org/sdg/9
Ensure access to affordable, reliable, sustainable and modern energy for all
Build resilient infrastructure, promote inclusive and sustainable industrialization and foster innovation
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spelling Detailed kinetic analysis and modelling of the dry gasification reaction of olive kernel and lignite coal charsLampropoulos, AthanasiosVarvoutis, GeorgiosMontes Morán, Miguel ÁngelMenéndez Díaz, José ÁngelKonsolakis, MichalisMarnellos, George E.Olive kernel charCO2 gasification reactivityLignite coal charMechanistic considerationsModel-free kinetic analysishttp://metadata.un.org/sdg/7http://metadata.un.org/sdg/9Ensure access to affordable, reliable, sustainable and modern energy for allBuild resilient infrastructure, promote inclusive and sustainable industrialization and foster innovationThe dry gasification process of solid fuels is a promising pathway to mitigate and utilize captured CO2 emissions toward syngas generation with tailored composition for several downstream energy conversion and chemical production processes. In the present work, comprehensive kinetic analysis and reaction modelling studies were carried out for olive kernel and lignite coal chars gasification reaction using pure CO2 as gasifying agent. Chars reactivity and kinetics of the gasification reactions were thoroughly examined by thermogravimetric analysis at three different heating rates and correlated with their physicochemical properties. The reactivity of olive kernel char, as determined by the mean gasification reactivity and the comprehensive gasification characteristic index, S, was almost three times higher compared to that of the lignite coal char. It was disclosed that the fixed carbon content and alkali index (AI) have a major impact on the reactivity of chars. The activation energy, Ea, estimated by three different model-free kinetic methods was ranged between 140 and 170 kJ/mol and 250–350 kJ/mol for the olive kernel and lignite coal chars, respectively. The activation energy values for the lignite coal char significantly varied with carbon conversion degree, whereas this was not the case for olive kernel char, where the activation energy remained essentially unmodified throughout the whole carbon conversion range. Finally, the combined Malek and Coats-Rendfrem method was applied to unravel the mechanism of chars-CO2 gasification reaction. It was found that the olive kernel char-CO2 gasification can be described with a 2D-diffusion mechanism function (D2) whereas the lignite coal char-CO2 gasification follows a second order chemical reaction mechanism function (F2).This research has been co-financed by the European Union and Greek national funds through the Operational Program Competitiveness, Entrepreneurship and Innovation, under the call ERA-NETS 2018 (project code: Τ8ΕΡΑ2-00005). MAM and JAM acknowledge the financial support received from the Ministerio de Ciencia e Innovación (MCIN/AEI/10.13039/501100011033, Project PID2020-115334 GB-I00) and Principado de Asturias (FICYT)-European Union (FEDER) (Project PCTI-Asturias IDI/2021/000015).Peer reviewedElsevierMinisterio de Ciencia e Innovación (España)Principado de AsturiasEuropean CommissionMontes Morán, Miguel Ángel [0000-0002-8791-5582]Menéndez Díaz, José Ángel [0000-0003-3117-3337]Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202420242023info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Postprintinfo:eu-repo/semantics/acceptedVersionhttp://hdl.handle.net/10261/342729https://api.elsevier.com/content/abstract/scopus_id/85138132996reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2020-115334GB-I00International Journal of Hydrogen Energyhttps://doi.org/10.1016/j.ijhydene.2022.08.246Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/3427292026-05-22T06:33:51Z
dc.title.none.fl_str_mv Detailed kinetic analysis and modelling of the dry gasification reaction of olive kernel and lignite coal chars
title Detailed kinetic analysis and modelling of the dry gasification reaction of olive kernel and lignite coal chars
spellingShingle Detailed kinetic analysis and modelling of the dry gasification reaction of olive kernel and lignite coal chars
Lampropoulos, Athanasios
Olive kernel char
CO2 gasification reactivity
Lignite coal char
Mechanistic considerations
Model-free kinetic analysis
http://metadata.un.org/sdg/7
http://metadata.un.org/sdg/9
Ensure access to affordable, reliable, sustainable and modern energy for all
Build resilient infrastructure, promote inclusive and sustainable industrialization and foster innovation
title_short Detailed kinetic analysis and modelling of the dry gasification reaction of olive kernel and lignite coal chars
title_full Detailed kinetic analysis and modelling of the dry gasification reaction of olive kernel and lignite coal chars
title_fullStr Detailed kinetic analysis and modelling of the dry gasification reaction of olive kernel and lignite coal chars
title_full_unstemmed Detailed kinetic analysis and modelling of the dry gasification reaction of olive kernel and lignite coal chars
title_sort Detailed kinetic analysis and modelling of the dry gasification reaction of olive kernel and lignite coal chars
dc.creator.none.fl_str_mv Lampropoulos, Athanasios
Varvoutis, Georgios
Montes Morán, Miguel Ángel
Menéndez Díaz, José Ángel
Konsolakis, Michalis
Marnellos, George E.
author Lampropoulos, Athanasios
author_facet Lampropoulos, Athanasios
Varvoutis, Georgios
Montes Morán, Miguel Ángel
Menéndez Díaz, José Ángel
Konsolakis, Michalis
Marnellos, George E.
author_role author
author2 Varvoutis, Georgios
Montes Morán, Miguel Ángel
Menéndez Díaz, José Ángel
Konsolakis, Michalis
Marnellos, George E.
author2_role author
author
author
author
author
dc.contributor.none.fl_str_mv Ministerio de Ciencia e Innovación (España)
Principado de Asturias
European Commission
Montes Morán, Miguel Ángel [0000-0002-8791-5582]
Menéndez Díaz, José Ángel [0000-0003-3117-3337]
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Olive kernel char
CO2 gasification reactivity
Lignite coal char
Mechanistic considerations
Model-free kinetic analysis
http://metadata.un.org/sdg/7
http://metadata.un.org/sdg/9
Ensure access to affordable, reliable, sustainable and modern energy for all
Build resilient infrastructure, promote inclusive and sustainable industrialization and foster innovation
topic Olive kernel char
CO2 gasification reactivity
Lignite coal char
Mechanistic considerations
Model-free kinetic analysis
http://metadata.un.org/sdg/7
http://metadata.un.org/sdg/9
Ensure access to affordable, reliable, sustainable and modern energy for all
Build resilient infrastructure, promote inclusive and sustainable industrialization and foster innovation
description The dry gasification process of solid fuels is a promising pathway to mitigate and utilize captured CO2 emissions toward syngas generation with tailored composition for several downstream energy conversion and chemical production processes. In the present work, comprehensive kinetic analysis and reaction modelling studies were carried out for olive kernel and lignite coal chars gasification reaction using pure CO2 as gasifying agent. Chars reactivity and kinetics of the gasification reactions were thoroughly examined by thermogravimetric analysis at three different heating rates and correlated with their physicochemical properties. The reactivity of olive kernel char, as determined by the mean gasification reactivity and the comprehensive gasification characteristic index, S, was almost three times higher compared to that of the lignite coal char. It was disclosed that the fixed carbon content and alkali index (AI) have a major impact on the reactivity of chars. The activation energy, Ea, estimated by three different model-free kinetic methods was ranged between 140 and 170 kJ/mol and 250–350 kJ/mol for the olive kernel and lignite coal chars, respectively. The activation energy values for the lignite coal char significantly varied with carbon conversion degree, whereas this was not the case for olive kernel char, where the activation energy remained essentially unmodified throughout the whole carbon conversion range. Finally, the combined Malek and Coats-Rendfrem method was applied to unravel the mechanism of chars-CO2 gasification reaction. It was found that the olive kernel char-CO2 gasification can be described with a 2D-diffusion mechanism function (D2) whereas the lignite coal char-CO2 gasification follows a second order chemical reaction mechanism function (F2).
publishDate 2023
dc.date.none.fl_str_mv 2023
2024
2024
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Postprint
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/342729
https://api.elsevier.com/content/abstract/scopus_id/85138132996
url http://hdl.handle.net/10261/342729
https://api.elsevier.com/content/abstract/scopus_id/85138132996
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv #PLACEHOLDER_PARENT_METADATA_VALUE#
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2020-115334GB-I00
International Journal of Hydrogen Energy
https://doi.org/10.1016/j.ijhydene.2022.08.246
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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