Thermal behaviour and kinetics of coal/biomass blends during co-combustion

The thermal characteristics and kinetics of coal, biomass (pine sawdust) and their blends were evaluated under combustion conditions using a non-isothermal thermogravimetric method (TGA). Biomass was blended with coal in the range of 5–80 wt.% to evaluate their co-combustion behaviour. No significan...

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Autores: Gil Matellanes, María Victoria, Casal Banciella, María Dolores, Pevida García, Covadonga, Pis Martínez, José Juan, Rubiera González, Fernando
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2010
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/103694
Acceso en línea:http://hdl.handle.net/10261/103694
Access Level:acceso abierto
Palabra clave:Biomass
Coal
Co-combustion
TG
Kinetics
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spelling Thermal behaviour and kinetics of coal/biomass blends during co-combustionGil Matellanes, María VictoriaCasal Banciella, María DoloresPevida García, CovadongaPis Martínez, José JuanRubiera González, FernandoBiomassCoalCo-combustionTGKineticsThe thermal characteristics and kinetics of coal, biomass (pine sawdust) and their blends were evaluated under combustion conditions using a non-isothermal thermogravimetric method (TGA). Biomass was blended with coal in the range of 5–80 wt.% to evaluate their co-combustion behaviour. No significant interactions were detected between the coal and biomass, since no deviations from their expected behaviour were observed in these experiments. Biomass combustion takes place in two steps: between 200 and 360 °C the volatiles are released and burned, and at 360–490 °C char combustion takes place. In contrast, coal is characterized by only one combustion stage at 315–615 °C. The coal/biomass blends presented three combustion steps, corresponding to the sum of the biomass and coal individual stages. Several solid-state mechanisms were tested by the Coats–Redfern method in order to find out the mechanisms responsible for the oxidation of the samples. The kinetic parameters were determined assuming single separate reactions for each stage of thermal conversion. The combustion process of coal consists of one reaction, whereas, in the case of the biomass and coal/biomass blends, this process consists of two or three independent reactions, respectively. The results showed that the chemical first order reaction is the most effective mechanism for the first step of biomass oxidation and for coal combustion. However, diffusion mechanisms were found to be responsible for the second step of biomass combustion.Work carried out with financial support from the Spanish MICINN (Project PS- 120000-2006-3, EcoCombos), and co-financed by the European Regional Development Fund, ERDF.Peer reviewedElsevierConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]201420142010info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Postprintinfo:eu-repo/semantics/acceptedVersionhttp://hdl.handle.net/10261/103694reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttp://dx.doi.org/10.1016/j.biortech.2010.02.008Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/1036942026-05-22T06:33:51Z
dc.title.none.fl_str_mv Thermal behaviour and kinetics of coal/biomass blends during co-combustion
title Thermal behaviour and kinetics of coal/biomass blends during co-combustion
spellingShingle Thermal behaviour and kinetics of coal/biomass blends during co-combustion
Gil Matellanes, María Victoria
Biomass
Coal
Co-combustion
TG
Kinetics
title_short Thermal behaviour and kinetics of coal/biomass blends during co-combustion
title_full Thermal behaviour and kinetics of coal/biomass blends during co-combustion
title_fullStr Thermal behaviour and kinetics of coal/biomass blends during co-combustion
title_full_unstemmed Thermal behaviour and kinetics of coal/biomass blends during co-combustion
title_sort Thermal behaviour and kinetics of coal/biomass blends during co-combustion
dc.creator.none.fl_str_mv Gil Matellanes, María Victoria
Casal Banciella, María Dolores
Pevida García, Covadonga
Pis Martínez, José Juan
Rubiera González, Fernando
author Gil Matellanes, María Victoria
author_facet Gil Matellanes, María Victoria
Casal Banciella, María Dolores
Pevida García, Covadonga
Pis Martínez, José Juan
Rubiera González, Fernando
author_role author
author2 Casal Banciella, María Dolores
Pevida García, Covadonga
Pis Martínez, José Juan
Rubiera González, Fernando
author2_role author
author
author
author
dc.contributor.none.fl_str_mv Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Biomass
Coal
Co-combustion
TG
Kinetics
topic Biomass
Coal
Co-combustion
TG
Kinetics
description The thermal characteristics and kinetics of coal, biomass (pine sawdust) and their blends were evaluated under combustion conditions using a non-isothermal thermogravimetric method (TGA). Biomass was blended with coal in the range of 5–80 wt.% to evaluate their co-combustion behaviour. No significant interactions were detected between the coal and biomass, since no deviations from their expected behaviour were observed in these experiments. Biomass combustion takes place in two steps: between 200 and 360 °C the volatiles are released and burned, and at 360–490 °C char combustion takes place. In contrast, coal is characterized by only one combustion stage at 315–615 °C. The coal/biomass blends presented three combustion steps, corresponding to the sum of the biomass and coal individual stages. Several solid-state mechanisms were tested by the Coats–Redfern method in order to find out the mechanisms responsible for the oxidation of the samples. The kinetic parameters were determined assuming single separate reactions for each stage of thermal conversion. The combustion process of coal consists of one reaction, whereas, in the case of the biomass and coal/biomass blends, this process consists of two or three independent reactions, respectively. The results showed that the chemical first order reaction is the most effective mechanism for the first step of biomass oxidation and for coal combustion. However, diffusion mechanisms were found to be responsible for the second step of biomass combustion.
publishDate 2010
dc.date.none.fl_str_mv 2010
2014
2014
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/10261/103694
url http://hdl.handle.net/10261/103694
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv http://dx.doi.org/10.1016/j.biortech.2010.02.008
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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