Measuring heat capacity of activated carbons for CO2 capture

Capturing CO2 with solid adsorbents can be often limited by heat transfer during the regeneration process rather than mass transfer during the adsorption process. The use of a low-heat capacity adsorbent would result in a lower energy penalty for the regeneration step. Specific heat capacity (Cp) da...

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Autores: Querejeta Montes, Nausika, García López, Susana, Álvarez Gutiérrez, Noelia, Rubiera González, Fernando, Pevida García, Covadonga
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2019
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:dnet:digitalcsic_::43261bfd60cc058c553fb51c5a2cab34
Acceso en línea:http://hdl.handle.net/10261/182440
Access Level:acceso abierto
Palabra clave:Heat capacity
Activated carbon
Temperature swing adsorption
CO2 capture
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spelling Measuring heat capacity of activated carbons for CO2 captureQuerejeta Montes, NausikaGarcía López, SusanaÁlvarez Gutiérrez, NoeliaRubiera González, FernandoPevida García, CovadongaHeat capacityActivated carbonTemperature swing adsorptionCO2 captureCapturing CO2 with solid adsorbents can be often limited by heat transfer during the regeneration process rather than mass transfer during the adsorption process. The use of a low-heat capacity adsorbent would result in a lower energy penalty for the regeneration step. Specific heat capacity (Cp) data knowledge of solid adsorbents is still scarce in the literature. To gather information in this regard, activated carbons (ACs) prepared from different precursor materials, synthesis conditions, activating agents and surface modifications have been experimentally tested. The specific heat capacity has been evaluated at temperatures ranging from 50 to 190 °C, relevant for temperature swing adsorption (TSA) based CO2 capture processes. A thermogravimetric analyser/differential scanning calorimeter (TGA/DSC) has been used for the experimental testing. Cp values of the evaluated adsorbents evidenced significant dependency on temperature: adsorbents either showed a linear upward trend with temperature –phenolic resin-derived ACs- or they peaked at a determined temperature range –biomass based ACs-. This peak has been ascribed to oxidation reactions of biomass based carbons during the experiment. It is noteworthy that adsorbent surface modification plays a key role in the specific heat capacity of the resultant carbon. Likewise, the acid and basic character of the carbon surface has been identified as key parameter for effective regeneration in TSA processes. AC adsorbents with an acidic character are undesirable owing to their higher specific heat capacities.Peer reviewedElsevierRubiera González, Fernando [0000-0003-0385-1102]Pevida García, Covadonga [0000-0002-4662-8448]Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]201920192019info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Postprintinfo:eu-repo/semantics/acceptedVersionhttp://hdl.handle.net/10261/182440reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttps://doi.org/10.1016/j.jcou.2019.05.018Síinfo:eu-repo/semantics/openAccessoai:dnet:digitalcsic_::43261bfd60cc058c553fb51c5a2cab342026-05-22T06:33:51Z
dc.title.none.fl_str_mv Measuring heat capacity of activated carbons for CO2 capture
title Measuring heat capacity of activated carbons for CO2 capture
spellingShingle Measuring heat capacity of activated carbons for CO2 capture
Querejeta Montes, Nausika
Heat capacity
Activated carbon
Temperature swing adsorption
CO2 capture
title_short Measuring heat capacity of activated carbons for CO2 capture
title_full Measuring heat capacity of activated carbons for CO2 capture
title_fullStr Measuring heat capacity of activated carbons for CO2 capture
title_full_unstemmed Measuring heat capacity of activated carbons for CO2 capture
title_sort Measuring heat capacity of activated carbons for CO2 capture
dc.creator.none.fl_str_mv Querejeta Montes, Nausika
García López, Susana
Álvarez Gutiérrez, Noelia
Rubiera González, Fernando
Pevida García, Covadonga
author Querejeta Montes, Nausika
author_facet Querejeta Montes, Nausika
García López, Susana
Álvarez Gutiérrez, Noelia
Rubiera González, Fernando
Pevida García, Covadonga
author_role author
author2 García López, Susana
Álvarez Gutiérrez, Noelia
Rubiera González, Fernando
Pevida García, Covadonga
author2_role author
author
author
author
dc.contributor.none.fl_str_mv Rubiera González, Fernando [0000-0003-0385-1102]
Pevida García, Covadonga [0000-0002-4662-8448]
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Heat capacity
Activated carbon
Temperature swing adsorption
CO2 capture
topic Heat capacity
Activated carbon
Temperature swing adsorption
CO2 capture
description Capturing CO2 with solid adsorbents can be often limited by heat transfer during the regeneration process rather than mass transfer during the adsorption process. The use of a low-heat capacity adsorbent would result in a lower energy penalty for the regeneration step. Specific heat capacity (Cp) data knowledge of solid adsorbents is still scarce in the literature. To gather information in this regard, activated carbons (ACs) prepared from different precursor materials, synthesis conditions, activating agents and surface modifications have been experimentally tested. The specific heat capacity has been evaluated at temperatures ranging from 50 to 190 °C, relevant for temperature swing adsorption (TSA) based CO2 capture processes. A thermogravimetric analyser/differential scanning calorimeter (TGA/DSC) has been used for the experimental testing. Cp values of the evaluated adsorbents evidenced significant dependency on temperature: adsorbents either showed a linear upward trend with temperature –phenolic resin-derived ACs- or they peaked at a determined temperature range –biomass based ACs-. This peak has been ascribed to oxidation reactions of biomass based carbons during the experiment. It is noteworthy that adsorbent surface modification plays a key role in the specific heat capacity of the resultant carbon. Likewise, the acid and basic character of the carbon surface has been identified as key parameter for effective regeneration in TSA processes. AC adsorbents with an acidic character are undesirable owing to their higher specific heat capacities.
publishDate 2019
dc.date.none.fl_str_mv 2019
2019
2019
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/10261/182440
url http://hdl.handle.net/10261/182440
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv https://doi.org/10.1016/j.jcou.2019.05.018
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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