Hydrogenolysis of glycerol to obtain 1,2-propanediol on Ce-promoted Ni/SBA-15 catalysts

[EN]Metallic Ni (10 wt.%) supported on SBA-15 silica and promoted with cerium loading ranged between 2.5 and 10 wt.%, reduced at 723 K during 1 h, were used as catalysts in the hydrogenolysis of a glycerol aqueous solution (80 wt.%) at 473 K and 2.4 MPa of H2 pressure. Whereas pure Ni catalyst mainl...

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Autores: Jiménez Morales, Ignacio, Vila, F., Mariscal, R., Jiménez-López, A.
Tipo de recurso: artículo
Estado:Versión borrador
Fecha de publicación:2012
País:España
Institución:Universidad de Salamanca (USAL)
Repositorio:GREDOS. Repositorio Institucional de la Universidad de Salamanca
OAI Identifier:oai:gredos.usal.es:10366/163115
Acceso en línea:http://hdl.handle.net/10366/163115
Access Level:acceso abierto
Palabra clave:Glycerol
Hydrogenolysis
SBA-15
Acid catalysts
Metallic nickel
Ceria
2210.28 Química del Estado Sólido
2303 Química Inorgánica
2391 Química Ambiental
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oai_identifier_str oai:gredos.usal.es:10366/163115
network_acronym_str ES
network_name_str España
repository_id_str
spelling Hydrogenolysis of glycerol to obtain 1,2-propanediol on Ce-promoted Ni/SBA-15 catalystsJiménez Morales, IgnacioVila, F.Mariscal, R.Jiménez-López, A.GlycerolHydrogenolysisSBA-15Acid catalystsMetallic nickelCeria2210.28 Química del Estado Sólido2303 Química Inorgánica2391 Química Ambiental[EN]Metallic Ni (10 wt.%) supported on SBA-15 silica and promoted with cerium loading ranged between 2.5 and 10 wt.%, reduced at 723 K during 1 h, were used as catalysts in the hydrogenolysis of a glycerol aqueous solution (80 wt.%) at 473 K and 2.4 MPa of H2 pressure. Whereas pure Ni catalyst mainly produces volatile products by Csingle bondC hydrogenolysis reaction, the promoted cerium catalysts lead to the formation of 1,2-propanediol (1,2-PDO) as majority product. After 8 h of reaction the catalyst with 10 wt.% of Ni and 7.5 wt.% of Ce gives the maximum glycerol conversion and selectivity to 1,2-PDO, with yield of this substance of 24.2%/g of catalyst. The presence of cerium species is essential to produce 1,2-PDO. The effect of cerium oxide is to act as strong acid sites (TPD-NH3), improve the metallic Ni dispersion (XRD, H2 chemisorption and XPS) and to make more difficult their reduction (TPR). The stronger acidity suggests that the formation of acetol takes place easier in these catalysts and subsequently this intermediate is reduced by activated hydrogen from the nearby Ni metallic sites.Ministerio de Ciencia e Innovación y Junta de AndalucíaElsevier202520252012info:eu-repo/semantics/articleinfo:eu-repo/semantics/drafthttp://hdl.handle.net/10366/163115reponame:GREDOS. Repositorio Institucional de la Universidad de Salamancainstname:Universidad de Salamanca (USAL)InglésENE2009-12743-C04-03/01P09-FQM-5070Attribution-NonCommercial-NoDerivatives 4.0 Internacionalhttp://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/openAccessoai:gredos.usal.es:10366/1631152026-06-07T06:28:51Z
dc.title.none.fl_str_mv Hydrogenolysis of glycerol to obtain 1,2-propanediol on Ce-promoted Ni/SBA-15 catalysts
title Hydrogenolysis of glycerol to obtain 1,2-propanediol on Ce-promoted Ni/SBA-15 catalysts
spellingShingle Hydrogenolysis of glycerol to obtain 1,2-propanediol on Ce-promoted Ni/SBA-15 catalysts
Jiménez Morales, Ignacio
Glycerol
Hydrogenolysis
SBA-15
Acid catalysts
Metallic nickel
Ceria
2210.28 Química del Estado Sólido
2303 Química Inorgánica
2391 Química Ambiental
title_short Hydrogenolysis of glycerol to obtain 1,2-propanediol on Ce-promoted Ni/SBA-15 catalysts
title_full Hydrogenolysis of glycerol to obtain 1,2-propanediol on Ce-promoted Ni/SBA-15 catalysts
title_fullStr Hydrogenolysis of glycerol to obtain 1,2-propanediol on Ce-promoted Ni/SBA-15 catalysts
title_full_unstemmed Hydrogenolysis of glycerol to obtain 1,2-propanediol on Ce-promoted Ni/SBA-15 catalysts
title_sort Hydrogenolysis of glycerol to obtain 1,2-propanediol on Ce-promoted Ni/SBA-15 catalysts
dc.creator.none.fl_str_mv Jiménez Morales, Ignacio
Vila, F.
Mariscal, R.
Jiménez-López, A.
author Jiménez Morales, Ignacio
author_facet Jiménez Morales, Ignacio
Vila, F.
Mariscal, R.
Jiménez-López, A.
author_role author
author2 Vila, F.
Mariscal, R.
Jiménez-López, A.
author2_role author
author
author
dc.subject.none.fl_str_mv Glycerol
Hydrogenolysis
SBA-15
Acid catalysts
Metallic nickel
Ceria
2210.28 Química del Estado Sólido
2303 Química Inorgánica
2391 Química Ambiental
topic Glycerol
Hydrogenolysis
SBA-15
Acid catalysts
Metallic nickel
Ceria
2210.28 Química del Estado Sólido
2303 Química Inorgánica
2391 Química Ambiental
description [EN]Metallic Ni (10 wt.%) supported on SBA-15 silica and promoted with cerium loading ranged between 2.5 and 10 wt.%, reduced at 723 K during 1 h, were used as catalysts in the hydrogenolysis of a glycerol aqueous solution (80 wt.%) at 473 K and 2.4 MPa of H2 pressure. Whereas pure Ni catalyst mainly produces volatile products by Csingle bondC hydrogenolysis reaction, the promoted cerium catalysts lead to the formation of 1,2-propanediol (1,2-PDO) as majority product. After 8 h of reaction the catalyst with 10 wt.% of Ni and 7.5 wt.% of Ce gives the maximum glycerol conversion and selectivity to 1,2-PDO, with yield of this substance of 24.2%/g of catalyst. The presence of cerium species is essential to produce 1,2-PDO. The effect of cerium oxide is to act as strong acid sites (TPD-NH3), improve the metallic Ni dispersion (XRD, H2 chemisorption and XPS) and to make more difficult their reduction (TPR). The stronger acidity suggests that the formation of acetol takes place easier in these catalysts and subsequently this intermediate is reduced by activated hydrogen from the nearby Ni metallic sites.
publishDate 2012
dc.date.none.fl_str_mv 2012
2025
2025
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/draft
format article
status_str draft
dc.identifier.none.fl_str_mv http://hdl.handle.net/10366/163115
url http://hdl.handle.net/10366/163115
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv ENE2009-12743-C04-03/01
P09-FQM-5070
dc.rights.none.fl_str_mv Attribution-NonCommercial-NoDerivatives 4.0 Internacional
http://creativecommons.org/licenses/by-nc-nd/4.0/
info:eu-repo/semantics/openAccess
rights_invalid_str_mv Attribution-NonCommercial-NoDerivatives 4.0 Internacional
http://creativecommons.org/licenses/by-nc-nd/4.0/
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:GREDOS. Repositorio Institucional de la Universidad de Salamanca
instname:Universidad de Salamanca (USAL)
instname_str Universidad de Salamanca (USAL)
reponame_str GREDOS. Repositorio Institucional de la Universidad de Salamanca
collection GREDOS. Repositorio Institucional de la Universidad de Salamanca
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15.811543

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