A comparison between the precipitation and impregnation methods for water-gas shift catalysts

Autores
Pereira, Amalia Luz C.; Berrocal, Guillermo Jose P.; Marchetti, Sergio Gustavo; Albornoz, Alberto; de Souza, Alexilda O.; Rangel, Maria do Carmo
Año de publicación
2007
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The precipitation and impregnation methods in the preparation of chromium-doped magnetite for water gas shift reaction (WGSR) were compared in this work. This reaction is an important step in the commercial production of highly pure hydrogen from natural gas or naphtha feedstocks. It was found that the preparation method affects both the textural and catalytic properties of chromium-doped magnetite. However, chromium was able to preserve the specific surface area during the WGSR and to delay the metallic iron production, independently of the preparation method. Chromium caused a decrease in activity per area, depending on the preparation method. This fact was assigned to its ability in making the production of Fe2+ species more difficult, making the catalytic sites less active, because the redox cycle of the reaction becomes more difficult. The most active catalyst was obtained by adding chromium by impregnation, which led to a large amount of total chromium in the solid and then a catalyst with high specific surface area was produced. It was showed that the catalysts can be prepared in the active phase avoiding the reduction step, before reaction
Fil: Pereira, Amalia Luz C.. Universidade Federal da Bahia. Instituto de Quımica; Brasil
Fil: Berrocal, Guillermo Jose P.. Universidade Federal da Bahia. Instituto de Quımica; Brasil
Fil: Marchetti, Sergio Gustavo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigación y Desarrollo en Ciencias Aplicadas ; Argentina
Fil: Albornoz, Alberto. Instituto Venezolano de Investigaciones Cientıficas. Centro de Quımica; Venezuela
Fil: de Souza, Alexilda O.. Universidade Estadual do Sudoeste da Bahia; Brasil
Fil: Rangel, Maria do Carmo. Universidade Federal da Bahia. Instituto de Quımica; Brasil
Materia
Chromium-Doped Magnetite
Hydrogen
Wgsr
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/32424
Acceder
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network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling A comparison between the precipitation and impregnation methods for water-gas shift catalystsPereira, Amalia Luz C.Berrocal, Guillermo Jose P.Marchetti, Sergio GustavoAlbornoz, Albertode Souza, Alexilda O.Rangel, Maria do CarmoChromium-Doped MagnetiteHydrogenWgsrhttps://purl.org/becyt/ford/2.4https://purl.org/becyt/ford/2The precipitation and impregnation methods in the preparation of chromium-doped magnetite for water gas shift reaction (WGSR) were compared in this work. This reaction is an important step in the commercial production of highly pure hydrogen from natural gas or naphtha feedstocks. It was found that the preparation method affects both the textural and catalytic properties of chromium-doped magnetite. However, chromium was able to preserve the specific surface area during the WGSR and to delay the metallic iron production, independently of the preparation method. Chromium caused a decrease in activity per area, depending on the preparation method. This fact was assigned to its ability in making the production of Fe2+ species more difficult, making the catalytic sites less active, because the redox cycle of the reaction becomes more difficult. The most active catalyst was obtained by adding chromium by impregnation, which led to a large amount of total chromium in the solid and then a catalyst with high specific surface area was produced. It was showed that the catalysts can be prepared in the active phase avoiding the reduction step, before reactionFil: Pereira, Amalia Luz C.. Universidade Federal da Bahia. Instituto de Quımica; BrasilFil: Berrocal, Guillermo Jose P.. Universidade Federal da Bahia. Instituto de Quımica; BrasilFil: Marchetti, Sergio Gustavo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigación y Desarrollo en Ciencias Aplicadas ; ArgentinaFil: Albornoz, Alberto. Instituto Venezolano de Investigaciones Cientıficas. Centro de Quımica; VenezuelaFil: de Souza, Alexilda O.. Universidade Estadual do Sudoeste da Bahia; BrasilFil: Rangel, Maria do Carmo. Universidade Federal da Bahia. Instituto de Quımica; BrasilElsevier Science2007-07-28info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/32424Albornoz, Alberto; Marchetti, Sergio Gustavo; Rangel, Maria do Carmo; de Souza, Alexilda O.; Berrocal, Guillermo Jose P.; Pereira, Amalia Luz C.; et al.; A comparison between the precipitation and impregnation methods for water-gas shift catalysts; Elsevier Science; Journal of Molecular Catalysis A: Chemical; 281; 1-2; 28-7-2007; 66-721381-1169CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.molcata.2007.07.042info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S1381116907004645info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:53:29Zoai:ri.conicet.gov.ar:11336/32424instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 09:53:29.649CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv A comparison between the precipitation and impregnation methods for water-gas shift catalysts
title A comparison between the precipitation and impregnation methods for water-gas shift catalysts
spellingShingle A comparison between the precipitation and impregnation methods for water-gas shift catalysts
Pereira, Amalia Luz C.
Chromium-Doped Magnetite
Hydrogen
Wgsr
title_short A comparison between the precipitation and impregnation methods for water-gas shift catalysts
title_full A comparison between the precipitation and impregnation methods for water-gas shift catalysts
title_fullStr A comparison between the precipitation and impregnation methods for water-gas shift catalysts
title_full_unstemmed A comparison between the precipitation and impregnation methods for water-gas shift catalysts
title_sort A comparison between the precipitation and impregnation methods for water-gas shift catalysts
dc.creator.none.fl_str_mv Pereira, Amalia Luz C.
Berrocal, Guillermo Jose P.
Marchetti, Sergio Gustavo
Albornoz, Alberto
de Souza, Alexilda O.
Rangel, Maria do Carmo
author Pereira, Amalia Luz C.
author_facet Pereira, Amalia Luz C.
Berrocal, Guillermo Jose P.
Marchetti, Sergio Gustavo
Albornoz, Alberto
de Souza, Alexilda O.
Rangel, Maria do Carmo
author_role author
author2 Berrocal, Guillermo Jose P.
Marchetti, Sergio Gustavo
Albornoz, Alberto
de Souza, Alexilda O.
Rangel, Maria do Carmo
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv Chromium-Doped Magnetite
Hydrogen
Wgsr
topic Chromium-Doped Magnetite
Hydrogen
Wgsr
purl_subject.fl_str_mv https://purl.org/becyt/ford/2.4
https://purl.org/becyt/ford/2
dc.description.none.fl_txt_mv The precipitation and impregnation methods in the preparation of chromium-doped magnetite for water gas shift reaction (WGSR) were compared in this work. This reaction is an important step in the commercial production of highly pure hydrogen from natural gas or naphtha feedstocks. It was found that the preparation method affects both the textural and catalytic properties of chromium-doped magnetite. However, chromium was able to preserve the specific surface area during the WGSR and to delay the metallic iron production, independently of the preparation method. Chromium caused a decrease in activity per area, depending on the preparation method. This fact was assigned to its ability in making the production of Fe2+ species more difficult, making the catalytic sites less active, because the redox cycle of the reaction becomes more difficult. The most active catalyst was obtained by adding chromium by impregnation, which led to a large amount of total chromium in the solid and then a catalyst with high specific surface area was produced. It was showed that the catalysts can be prepared in the active phase avoiding the reduction step, before reaction
Fil: Pereira, Amalia Luz C.. Universidade Federal da Bahia. Instituto de Quımica; Brasil
Fil: Berrocal, Guillermo Jose P.. Universidade Federal da Bahia. Instituto de Quımica; Brasil
Fil: Marchetti, Sergio Gustavo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigación y Desarrollo en Ciencias Aplicadas ; Argentina
Fil: Albornoz, Alberto. Instituto Venezolano de Investigaciones Cientıficas. Centro de Quımica; Venezuela
Fil: de Souza, Alexilda O.. Universidade Estadual do Sudoeste da Bahia; Brasil
Fil: Rangel, Maria do Carmo. Universidade Federal da Bahia. Instituto de Quımica; Brasil
description The precipitation and impregnation methods in the preparation of chromium-doped magnetite for water gas shift reaction (WGSR) were compared in this work. This reaction is an important step in the commercial production of highly pure hydrogen from natural gas or naphtha feedstocks. It was found that the preparation method affects both the textural and catalytic properties of chromium-doped magnetite. However, chromium was able to preserve the specific surface area during the WGSR and to delay the metallic iron production, independently of the preparation method. Chromium caused a decrease in activity per area, depending on the preparation method. This fact was assigned to its ability in making the production of Fe2+ species more difficult, making the catalytic sites less active, because the redox cycle of the reaction becomes more difficult. The most active catalyst was obtained by adding chromium by impregnation, which led to a large amount of total chromium in the solid and then a catalyst with high specific surface area was produced. It was showed that the catalysts can be prepared in the active phase avoiding the reduction step, before reaction
publishDate 2007
dc.date.none.fl_str_mv 2007-07-28
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/32424
Albornoz, Alberto; Marchetti, Sergio Gustavo; Rangel, Maria do Carmo; de Souza, Alexilda O.; Berrocal, Guillermo Jose P.; Pereira, Amalia Luz C.; et al.; A comparison between the precipitation and impregnation methods for water-gas shift catalysts; Elsevier Science; Journal of Molecular Catalysis A: Chemical; 281; 1-2; 28-7-2007; 66-72
1381-1169
CONICET Digital
CONICET
url http://hdl.handle.net/11336/32424
identifier_str_mv Albornoz, Alberto; Marchetti, Sergio Gustavo; Rangel, Maria do Carmo; de Souza, Alexilda O.; Berrocal, Guillermo Jose P.; Pereira, Amalia Luz C.; et al.; A comparison between the precipitation and impregnation methods for water-gas shift catalysts; Elsevier Science; Journal of Molecular Catalysis A: Chemical; 281; 1-2; 28-7-2007; 66-72
1381-1169
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1016/j.molcata.2007.07.042
info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S1381116907004645
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier Science
publisher.none.fl_str_mv Elsevier Science
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
_version_ 1844613633397489664
score 13.070432

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