Investigation of the reduction kinetics of high loaded CuO-based materials suitable for the Ca/Cu looping process

12 Figures, 3 Tables.-- © 2018. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/

Detalles Bibliográficos
Autores: Díez-Martín, Laura, Martínez Berges, Isabel, Grasa Adiego, Gemma, Murillo Villuendas, Ramón
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2018
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/191459
Acceso en línea:http://hdl.handle.net/10261/191459
Access Level:acceso abierto
Palabra clave:Ca/Cu looping process
CuO-based materials
Reduction kinetics
Shrinking core model
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spelling Investigation of the reduction kinetics of high loaded CuO-based materials suitable for the Ca/Cu looping processDíez-Martín, LauraMartínez Berges, IsabelGrasa Adiego, GemmaMurillo Villuendas, RamónCa/Cu looping processCuO-based materialsReduction kineticsShrinking core model12 Figures, 3 Tables.-- © 2018. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/In this work, the reduction reactions of highly loaded CuO-based materials with H2, CO and CH4, have been investigated. The oxygen transport capacity of the materials was barely affected (i.e. losses around 5%) along 100 reduction/oxidation cycles at 1123 K tested in TGA. The experimental results suggested that a shrinking core model (SCM) with chemical reaction control is able to predict the reduction conversion of highly loaded CuO-based materials in powder and pellet form, and the kinetic parameters were accordingly determined to this model. The activation energy values obtained for the materials supported over Al2O3 and MgAl2O4 are in the range of 10 kJ mol−1 for H2, 25 kJ mol−1 for CO and 60 kJ mol−1 for CH4, in agreement with results published in the literature, indicating that using Al2O3 or MgAl2O4 as support has not a significant effect on the reactivity. It has been found that internal diffusion plays a role for the highly loaded CuO-based in pellet form when supported over MgAl2O4 and when using CO and CH4 as reducing agents. Mixtures of reducing gases have been also tested in the TGA for a pellet using Al2O3 as support and the experimental results have been successfully fitted using the kinetic parameters previously determined. Finally, a simplified energy balance for the reactions involved in the reduction/calcination stage of the Ca/Cu process has been performed to determine operational conditions in which the reaction fronts for both reactions proceed together in the reactor. The results indicate that the materials tested present suitable reaction kinetics to sustain the reduction/calcination stage.This work acknowledges the support by European Union Seventh Frame Programme FP7 under grant agreement n° 608512 (ASCENT Project). Laura Díez-Martín acknowledges the FPI fellowship (ENE 2012-37936-CO2-01, BES-2013-064616 financed by MINECO).Peer reviewedElsevierEuropean CommissionMinisterio de Economía y Competitividad (España)Grasa Adiego, Gemma [0000-0002-4242-5846]Murillo Villuendas, Ramón [0000-0002-0299-506X]Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]201920192018info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Postprintinfo:eu-repo/semantics/acceptedVersionhttp://hdl.handle.net/10261/191459reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/EC/FP7/608512http://dx.doi.org/10.1016/j.fuel.2018.05.054Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/1914592026-05-22T06:33:51Z
dc.title.none.fl_str_mv Investigation of the reduction kinetics of high loaded CuO-based materials suitable for the Ca/Cu looping process
title Investigation of the reduction kinetics of high loaded CuO-based materials suitable for the Ca/Cu looping process
spellingShingle Investigation of the reduction kinetics of high loaded CuO-based materials suitable for the Ca/Cu looping process
Díez-Martín, Laura
Ca/Cu looping process
CuO-based materials
Reduction kinetics
Shrinking core model
title_short Investigation of the reduction kinetics of high loaded CuO-based materials suitable for the Ca/Cu looping process
title_full Investigation of the reduction kinetics of high loaded CuO-based materials suitable for the Ca/Cu looping process
title_fullStr Investigation of the reduction kinetics of high loaded CuO-based materials suitable for the Ca/Cu looping process
title_full_unstemmed Investigation of the reduction kinetics of high loaded CuO-based materials suitable for the Ca/Cu looping process
title_sort Investigation of the reduction kinetics of high loaded CuO-based materials suitable for the Ca/Cu looping process
dc.creator.none.fl_str_mv Díez-Martín, Laura
Martínez Berges, Isabel
Grasa Adiego, Gemma
Murillo Villuendas, Ramón
author Díez-Martín, Laura
author_facet Díez-Martín, Laura
Martínez Berges, Isabel
Grasa Adiego, Gemma
Murillo Villuendas, Ramón
author_role author
author2 Martínez Berges, Isabel
Grasa Adiego, Gemma
Murillo Villuendas, Ramón
author2_role author
author
author
dc.contributor.none.fl_str_mv European Commission
Ministerio de Economía y Competitividad (España)
Grasa Adiego, Gemma [0000-0002-4242-5846]
Murillo Villuendas, Ramón [0000-0002-0299-506X]
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Ca/Cu looping process
CuO-based materials
Reduction kinetics
Shrinking core model
topic Ca/Cu looping process
CuO-based materials
Reduction kinetics
Shrinking core model
description 12 Figures, 3 Tables.-- © 2018. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
publishDate 2018
dc.date.none.fl_str_mv 2018
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/10261/191459
url http://hdl.handle.net/10261/191459
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/EC/FP7/608512
http://dx.doi.org/10.1016/j.fuel.2018.05.054
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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score 15,812429

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