Selective liquid-phase hydrogenation of citral over supported bimetallic Pt-Co catalysts

Autores
Bertero, Nicolas Maximiliano; Trasarti, Andres Fernando; Moraweck, Bernard; Borgna, Armando; Marchi, Alberto Julio
Año de publicación
2009
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The liquid-phase hydrogenation of citral was studied at 393 K and 10 bar on Pt-Co/C catalysts, having different Pt/(Pt+Co) ratios and containing a total metal loading of about 2%. The monometallic and bimetallic Pt-Co/C catalysts were prepared by impregnation and coimpregnation, respectively, with cobalt tris (acetylacetonate) and platinum bis(acetylacetonate). Monometallic Pt/C and Co/C catalysts showed very low activity and selectivity to the desired products. Undesirable reactions, such as citral decarbonilation and hydrogenolysis, were observed with these monometallic catalysts. Instead, bimetallic Pt-Co/C resulted very active and selective to geraniol/nerol and the main products detected were geraniol/nerol, citronellal and citronellol. Hydrogenation kinetic constants were determined by modeling catalytic data and using a pseudo-homogeneous kinetics. From the analysis of the kinetic parameters, an optimum Pt/(Pt+Co) ratio was found for both the catalytic activity and selectivity towards geraniol/nerol. Furthermore, it was determined that this optimum ratio depends on the activation conditions. Temperature-programmed reduction (TPR) experiments and X-ray Absorption Spectroscopy (XAS) demonstrated the existence of Pt-Co bimetallic compounds on the carbon support. On the basis of these results, it was proposed that cobalt improves the catalytic performance of platinum by electron transfer. This electron transfer is favored by the high interaction of both metals existing in this type of bimetallic compounds.
Fil: Bertero, Nicolas Maximiliano. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica ; Argentina
Fil: Trasarti, Andres Fernando. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica ; Argentina
Fil: Moraweck, Bernard. Centre National de la Recherche Scientifique; Francia
Fil: Borgna, Armando. Institute of Chemical and Engineering Sciences (ICES-A*Star); Francia
Fil: Marchi, Alberto Julio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica ; Argentina
Materia
Citral Hydrogenation
Aldehydes (Alfa, Beta Unsaturated)
Platinum-Based Catalysts
Cobalt-Based Catalysts
Bimetallic Compounds
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:11336/57332
Acceder
id CONICETDig_b0413a64a9d088317b0530b69f7416f7
oai_identifier_str oai:ri.conicet.gov.ar:11336/57332
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Selective liquid-phase hydrogenation of citral over supported bimetallic Pt-Co catalystsBertero, Nicolas MaximilianoTrasarti, Andres FernandoMoraweck, BernardBorgna, ArmandoMarchi, Alberto JulioCitral HydrogenationAldehydes (Alfa, Beta Unsaturated)Platinum-Based CatalystsCobalt-Based CatalystsBimetallic Compoundshttps://purl.org/becyt/ford/2.4https://purl.org/becyt/ford/2https://purl.org/becyt/ford/2.4https://purl.org/becyt/ford/2The liquid-phase hydrogenation of citral was studied at 393 K and 10 bar on Pt-Co/C catalysts, having different Pt/(Pt+Co) ratios and containing a total metal loading of about 2%. The monometallic and bimetallic Pt-Co/C catalysts were prepared by impregnation and coimpregnation, respectively, with cobalt tris (acetylacetonate) and platinum bis(acetylacetonate). Monometallic Pt/C and Co/C catalysts showed very low activity and selectivity to the desired products. Undesirable reactions, such as citral decarbonilation and hydrogenolysis, were observed with these monometallic catalysts. Instead, bimetallic Pt-Co/C resulted very active and selective to geraniol/nerol and the main products detected were geraniol/nerol, citronellal and citronellol. Hydrogenation kinetic constants were determined by modeling catalytic data and using a pseudo-homogeneous kinetics. From the analysis of the kinetic parameters, an optimum Pt/(Pt+Co) ratio was found for both the catalytic activity and selectivity towards geraniol/nerol. Furthermore, it was determined that this optimum ratio depends on the activation conditions. Temperature-programmed reduction (TPR) experiments and X-ray Absorption Spectroscopy (XAS) demonstrated the existence of Pt-Co bimetallic compounds on the carbon support. On the basis of these results, it was proposed that cobalt improves the catalytic performance of platinum by electron transfer. This electron transfer is favored by the high interaction of both metals existing in this type of bimetallic compounds.Fil: Bertero, Nicolas Maximiliano. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica ; ArgentinaFil: Trasarti, Andres Fernando. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica ; ArgentinaFil: Moraweck, Bernard. Centre National de la Recherche Scientifique; FranciaFil: Borgna, Armando. Institute of Chemical and Engineering Sciences (ICES-A*Star); FranciaFil: Marchi, Alberto Julio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica ; ArgentinaElsevier Science2009-04info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/57332Bertero, Nicolas Maximiliano; Trasarti, Andres Fernando; Moraweck, Bernard; Borgna, Armando; Marchi, Alberto Julio; Selective liquid-phase hydrogenation of citral over supported bimetallic Pt-Co catalysts; Elsevier Science; Applied Catalysis A: General; 358; 1; 4-2009; 32-410926-860XCONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.apcata.2009.01.036info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T10:11:42Zoai:ri.conicet.gov.ar:11336/57332instacron: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:34982025-09-03 10:11:42.756CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Selective liquid-phase hydrogenation of citral over supported bimetallic Pt-Co catalysts
title Selective liquid-phase hydrogenation of citral over supported bimetallic Pt-Co catalysts
spellingShingle Selective liquid-phase hydrogenation of citral over supported bimetallic Pt-Co catalysts
Bertero, Nicolas Maximiliano
Citral Hydrogenation
Aldehydes (Alfa, Beta Unsaturated)
Platinum-Based Catalysts
Cobalt-Based Catalysts
Bimetallic Compounds
title_short Selective liquid-phase hydrogenation of citral over supported bimetallic Pt-Co catalysts
title_full Selective liquid-phase hydrogenation of citral over supported bimetallic Pt-Co catalysts
title_fullStr Selective liquid-phase hydrogenation of citral over supported bimetallic Pt-Co catalysts
title_full_unstemmed Selective liquid-phase hydrogenation of citral over supported bimetallic Pt-Co catalysts
title_sort Selective liquid-phase hydrogenation of citral over supported bimetallic Pt-Co catalysts
dc.creator.none.fl_str_mv Bertero, Nicolas Maximiliano
Trasarti, Andres Fernando
Moraweck, Bernard
Borgna, Armando
Marchi, Alberto Julio
author Bertero, Nicolas Maximiliano
author_facet Bertero, Nicolas Maximiliano
Trasarti, Andres Fernando
Moraweck, Bernard
Borgna, Armando
Marchi, Alberto Julio
author_role author
author2 Trasarti, Andres Fernando
Moraweck, Bernard
Borgna, Armando
Marchi, Alberto Julio
author2_role author
author
author
author
dc.subject.none.fl_str_mv Citral Hydrogenation
Aldehydes (Alfa, Beta Unsaturated)
Platinum-Based Catalysts
Cobalt-Based Catalysts
Bimetallic Compounds
topic Citral Hydrogenation
Aldehydes (Alfa, Beta Unsaturated)
Platinum-Based Catalysts
Cobalt-Based Catalysts
Bimetallic Compounds
purl_subject.fl_str_mv https://purl.org/becyt/ford/2.4
https://purl.org/becyt/ford/2
https://purl.org/becyt/ford/2.4
https://purl.org/becyt/ford/2
dc.description.none.fl_txt_mv The liquid-phase hydrogenation of citral was studied at 393 K and 10 bar on Pt-Co/C catalysts, having different Pt/(Pt+Co) ratios and containing a total metal loading of about 2%. The monometallic and bimetallic Pt-Co/C catalysts were prepared by impregnation and coimpregnation, respectively, with cobalt tris (acetylacetonate) and platinum bis(acetylacetonate). Monometallic Pt/C and Co/C catalysts showed very low activity and selectivity to the desired products. Undesirable reactions, such as citral decarbonilation and hydrogenolysis, were observed with these monometallic catalysts. Instead, bimetallic Pt-Co/C resulted very active and selective to geraniol/nerol and the main products detected were geraniol/nerol, citronellal and citronellol. Hydrogenation kinetic constants were determined by modeling catalytic data and using a pseudo-homogeneous kinetics. From the analysis of the kinetic parameters, an optimum Pt/(Pt+Co) ratio was found for both the catalytic activity and selectivity towards geraniol/nerol. Furthermore, it was determined that this optimum ratio depends on the activation conditions. Temperature-programmed reduction (TPR) experiments and X-ray Absorption Spectroscopy (XAS) demonstrated the existence of Pt-Co bimetallic compounds on the carbon support. On the basis of these results, it was proposed that cobalt improves the catalytic performance of platinum by electron transfer. This electron transfer is favored by the high interaction of both metals existing in this type of bimetallic compounds.
Fil: Bertero, Nicolas Maximiliano. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica ; Argentina
Fil: Trasarti, Andres Fernando. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica ; Argentina
Fil: Moraweck, Bernard. Centre National de la Recherche Scientifique; Francia
Fil: Borgna, Armando. Institute of Chemical and Engineering Sciences (ICES-A*Star); Francia
Fil: Marchi, Alberto Julio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica ; Argentina
description The liquid-phase hydrogenation of citral was studied at 393 K and 10 bar on Pt-Co/C catalysts, having different Pt/(Pt+Co) ratios and containing a total metal loading of about 2%. The monometallic and bimetallic Pt-Co/C catalysts were prepared by impregnation and coimpregnation, respectively, with cobalt tris (acetylacetonate) and platinum bis(acetylacetonate). Monometallic Pt/C and Co/C catalysts showed very low activity and selectivity to the desired products. Undesirable reactions, such as citral decarbonilation and hydrogenolysis, were observed with these monometallic catalysts. Instead, bimetallic Pt-Co/C resulted very active and selective to geraniol/nerol and the main products detected were geraniol/nerol, citronellal and citronellol. Hydrogenation kinetic constants were determined by modeling catalytic data and using a pseudo-homogeneous kinetics. From the analysis of the kinetic parameters, an optimum Pt/(Pt+Co) ratio was found for both the catalytic activity and selectivity towards geraniol/nerol. Furthermore, it was determined that this optimum ratio depends on the activation conditions. Temperature-programmed reduction (TPR) experiments and X-ray Absorption Spectroscopy (XAS) demonstrated the existence of Pt-Co bimetallic compounds on the carbon support. On the basis of these results, it was proposed that cobalt improves the catalytic performance of platinum by electron transfer. This electron transfer is favored by the high interaction of both metals existing in this type of bimetallic compounds.
publishDate 2009
dc.date.none.fl_str_mv 2009-04
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/11336/57332
Bertero, Nicolas Maximiliano; Trasarti, Andres Fernando; Moraweck, Bernard; Borgna, Armando; Marchi, Alberto Julio; Selective liquid-phase hydrogenation of citral over supported bimetallic Pt-Co catalysts; Elsevier Science; Applied Catalysis A: General; 358; 1; 4-2009; 32-41
0926-860X
CONICET Digital
CONICET
url http://hdl.handle.net/11336/57332
identifier_str_mv Bertero, Nicolas Maximiliano; Trasarti, Andres Fernando; Moraweck, Bernard; Borgna, Armando; Marchi, Alberto Julio; Selective liquid-phase hydrogenation of citral over supported bimetallic Pt-Co catalysts; Elsevier Science; Applied Catalysis A: General; 358; 1; 4-2009; 32-41
0926-860X
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.apcata.2009.01.036
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
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
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score 13.13397

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