Promoting effect of CeO2, ZrO2 and Ce/Zr mixed oxides on Co/-Al2O3 catalyst for Fischer-Tropsch synthesis

A series of cobalt-based catalysts have been synthesized using as support γ-Al2O3 promoted by ceria/zirconia mixed oxides with a variable Ce/Zr molar ratio. The obtained catalysts demonstrated oxide promotion results in the protection of the major textural properties, especially for Zr-rich solids....

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Autores: Garcilaso, Victoria, Barrientos, Javier, Bobadilla, Luis F., Laguna, Óscar H., Boutonnet, M., Centeno, Miguel Ángel, Odriozola, José Antonio
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:10261/170010
Acceso en línea:http://hdl.handle.net/10261/170010
Access Level:acceso abierto
Palabra clave:Cobalt-based catalysts
Oxide promoter
ZrCe oxides
Support acidity
Higher hydrocarbon selectivity
GTL
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spelling Promoting effect of CeO2, ZrO2 and Ce/Zr mixed oxides on Co/-Al2O3 catalyst for Fischer-Tropsch synthesisGarcilaso, VictoriaBarrientos, JavierBobadilla, Luis F.Laguna, Óscar H.Boutonnet, M.Centeno, Miguel ÁngelOdriozola, José AntonioCobalt-based catalystsOxide promoterZrCe oxidesSupport acidityHigher hydrocarbon selectivityGTLA series of cobalt-based catalysts have been synthesized using as support γ-Al2O3 promoted by ceria/zirconia mixed oxides with a variable Ce/Zr molar ratio. The obtained catalysts demonstrated oxide promotion results in the protection of the major textural properties, especially for Zr-rich solids. Reducibility of cobalt species was enhanced by the presence of mixed oxides. The chemical composition of the oxide promoter influenced not only physicochemical properties of final catalysts but also determined their performance during the reaction. In this sense, Zr-rich systems presented a superior catalytic performance both in total conversion and in selectivity towards long chain hydrocarbons. The observed Zr-promotion effect could be explained by two significant contributions: firstly, the partial inhibition of CoAl spinel compound formation by the presence of Zr-rich phases which enhances the availability of Co actives site and secondly, Zr-associate acidic sites promote higher hydrocarbons selectivity.Peer reviewedElsevierConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]201820182018info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Postprintinfo:eu-repo/semantics/acceptedVersionhttp://hdl.handle.net/10261/170010reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttps://doi.org/10.1016/j.renene.2018.08.080Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/1700102026-05-22T06:33:51Z
dc.title.none.fl_str_mv Promoting effect of CeO2, ZrO2 and Ce/Zr mixed oxides on Co/-Al2O3 catalyst for Fischer-Tropsch synthesis
title Promoting effect of CeO2, ZrO2 and Ce/Zr mixed oxides on Co/-Al2O3 catalyst for Fischer-Tropsch synthesis
spellingShingle Promoting effect of CeO2, ZrO2 and Ce/Zr mixed oxides on Co/-Al2O3 catalyst for Fischer-Tropsch synthesis
Garcilaso, Victoria
Cobalt-based catalysts
Oxide promoter
ZrCe oxides
Support acidity
Higher hydrocarbon selectivity
GTL
title_short Promoting effect of CeO2, ZrO2 and Ce/Zr mixed oxides on Co/-Al2O3 catalyst for Fischer-Tropsch synthesis
title_full Promoting effect of CeO2, ZrO2 and Ce/Zr mixed oxides on Co/-Al2O3 catalyst for Fischer-Tropsch synthesis
title_fullStr Promoting effect of CeO2, ZrO2 and Ce/Zr mixed oxides on Co/-Al2O3 catalyst for Fischer-Tropsch synthesis
title_full_unstemmed Promoting effect of CeO2, ZrO2 and Ce/Zr mixed oxides on Co/-Al2O3 catalyst for Fischer-Tropsch synthesis
title_sort Promoting effect of CeO2, ZrO2 and Ce/Zr mixed oxides on Co/-Al2O3 catalyst for Fischer-Tropsch synthesis
dc.creator.none.fl_str_mv Garcilaso, Victoria
Barrientos, Javier
Bobadilla, Luis F.
Laguna, Óscar H.
Boutonnet, M.
Centeno, Miguel Ángel
Odriozola, José Antonio
author Garcilaso, Victoria
author_facet Garcilaso, Victoria
Barrientos, Javier
Bobadilla, Luis F.
Laguna, Óscar H.
Boutonnet, M.
Centeno, Miguel Ángel
Odriozola, José Antonio
author_role author
author2 Barrientos, Javier
Bobadilla, Luis F.
Laguna, Óscar H.
Boutonnet, M.
Centeno, Miguel Ángel
Odriozola, José Antonio
author2_role author
author
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 Cobalt-based catalysts
Oxide promoter
ZrCe oxides
Support acidity
Higher hydrocarbon selectivity
GTL
topic Cobalt-based catalysts
Oxide promoter
ZrCe oxides
Support acidity
Higher hydrocarbon selectivity
GTL
description A series of cobalt-based catalysts have been synthesized using as support γ-Al2O3 promoted by ceria/zirconia mixed oxides with a variable Ce/Zr molar ratio. The obtained catalysts demonstrated oxide promotion results in the protection of the major textural properties, especially for Zr-rich solids. Reducibility of cobalt species was enhanced by the presence of mixed oxides. The chemical composition of the oxide promoter influenced not only physicochemical properties of final catalysts but also determined their performance during the reaction. In this sense, Zr-rich systems presented a superior catalytic performance both in total conversion and in selectivity towards long chain hydrocarbons. The observed Zr-promotion effect could be explained by two significant contributions: firstly, the partial inhibition of CoAl spinel compound formation by the presence of Zr-rich phases which enhances the availability of Co actives site and secondly, Zr-associate acidic sites promote higher hydrocarbons selectivity.
publishDate 2018
dc.date.none.fl_str_mv 2018
2018
2018
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/10261/170010
url http://hdl.handle.net/10261/170010
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv https://doi.org/10.1016/j.renene.2018.08.080
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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