A kinetic modeling of the liquid-phase oxidation of lactose over Pt- and Au-supported catalysts

Autores
Meyer, Camilo Ignacio; Regenhardt, Silvina Andrea; Zelin, Juan; Sebastian, V.; Marchi, Alberto Julio; Garetto, Teresita Francisca
Año de publicación
2015
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Pt and Au catalysts, 2 wt% metal loading, supported on SiO2 and Al2O3 were used to study the effect of metal and support on the liquid-phase oxidation of lactose. Pt-based catalysts were prepared by incipient wetness impregnation while Au-based catalysts were obtained by the precipitation-deposition method. Catalytic tests were carried out in aqueous phase at 65 °C, using O2 as oxidizing agent and keeping pH constant at 9 by controlled addition of NaOH aqueous solution. In all of the cases, the only product of reaction detected and quantified was lactobionic acid. It was found that Pt supported on Al2O3 was more active than Pt supported on SiO2. This was explained on the basis that metal Pt dispersion on Al2O3 was three times higher than on SiO2. At the same time, Au/Al2O3 catalyst was more active than Pt/Al2O3 catalysts. The higher activity of Au/Al2O3 was attributed to Au nanoparticles interacting with the support, as determined by transmission electron microscopy. It was also verified that Au/Al2O3 activity was almost the same after two consecutive runs, indicating a good stability of the Au active phase. Kinetic studies were carried out by varying the initial concentration of lactose in the reaction mixture. A negative order respect to the reactant, determined applying a pseudo-homogeneous model, was estimated, which indicates that lactose molecules are strongly adsorbed on the surface of metal Au nanoparticles. A LHHW model, assuming that oxygen chemisorption was the controlling step, allowed to explain the negative order respect to lactose.
Fil: Meyer, Camilo Ignacio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica ; Argentina. Universidad Nacional del Litoral. Facultad de Ingeniería Química; Argentina
Fil: Regenhardt, Silvina Andrea. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica ; Argentina. Universidad Nacional del Litoral. Facultad de Ingeniería Química; Argentina
Fil: Zelin, Juan. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica ; Argentina
Fil: Sebastian, V.. Universidad de Zaragoza. Facultad de Ciencias; España
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. Universidad Nacional del Litoral. Facultad de Ingeniería Química; Argentina
Fil: Garetto, Teresita Francisca. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica ; Argentina. Universidad Nacional del Litoral. Facultad de Ingeniería Química; Argentina
Materia
Lactose
Lactobionic Acid
Noble Metal Catalyst
Kinetic Modeling
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:11336/36817
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/36817
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling A kinetic modeling of the liquid-phase oxidation of lactose over Pt- and Au-supported catalystsMeyer, Camilo IgnacioRegenhardt, Silvina AndreaZelin, JuanSebastian, V.Marchi, Alberto JulioGaretto, Teresita FranciscaLactoseLactobionic AcidNoble Metal CatalystKinetic Modelinghttps://purl.org/becyt/ford/2.4https://purl.org/becyt/ford/2Pt and Au catalysts, 2 wt% metal loading, supported on SiO2 and Al2O3 were used to study the effect of metal and support on the liquid-phase oxidation of lactose. Pt-based catalysts were prepared by incipient wetness impregnation while Au-based catalysts were obtained by the precipitation-deposition method. Catalytic tests were carried out in aqueous phase at 65 °C, using O2 as oxidizing agent and keeping pH constant at 9 by controlled addition of NaOH aqueous solution. In all of the cases, the only product of reaction detected and quantified was lactobionic acid. It was found that Pt supported on Al2O3 was more active than Pt supported on SiO2. This was explained on the basis that metal Pt dispersion on Al2O3 was three times higher than on SiO2. At the same time, Au/Al2O3 catalyst was more active than Pt/Al2O3 catalysts. The higher activity of Au/Al2O3 was attributed to Au nanoparticles interacting with the support, as determined by transmission electron microscopy. It was also verified that Au/Al2O3 activity was almost the same after two consecutive runs, indicating a good stability of the Au active phase. Kinetic studies were carried out by varying the initial concentration of lactose in the reaction mixture. A negative order respect to the reactant, determined applying a pseudo-homogeneous model, was estimated, which indicates that lactose molecules are strongly adsorbed on the surface of metal Au nanoparticles. A LHHW model, assuming that oxygen chemisorption was the controlling step, allowed to explain the negative order respect to lactose.Fil: Meyer, Camilo Ignacio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica ; Argentina. Universidad Nacional del Litoral. Facultad de Ingeniería Química; ArgentinaFil: Regenhardt, Silvina Andrea. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica ; Argentina. Universidad Nacional del Litoral. Facultad de Ingeniería Química; ArgentinaFil: Zelin, Juan. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica ; ArgentinaFil: Sebastian, V.. Universidad de Zaragoza. Facultad de Ciencias; EspañaFil: Marchi, Alberto Julio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica ; Argentina. Universidad Nacional del Litoral. Facultad de Ingeniería Química; ArgentinaFil: Garetto, Teresita Francisca. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica ; Argentina. Universidad Nacional del Litoral. Facultad de Ingeniería Química; ArgentinaSpringer2015-04info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/36817Meyer, Camilo Ignacio; Regenhardt, Silvina Andrea; Zelin, Juan; Sebastian, V.; Marchi, Alberto Julio; et al.; A kinetic modeling of the liquid-phase oxidation of lactose over Pt- and Au-supported catalysts; Springer; Topics In Catalysis; 59; 2-4; 4-2015; 168-1771022-5528CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1007/s11244-015-0427-4info:eu-repo/semantics/altIdentifier/url/https://link.springer.com/article/10.1007/s11244-015-0427-4info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:41:43Zoai:ri.conicet.gov.ar:11336/36817instacron: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 09:41:43.781CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv A kinetic modeling of the liquid-phase oxidation of lactose over Pt- and Au-supported catalysts
title A kinetic modeling of the liquid-phase oxidation of lactose over Pt- and Au-supported catalysts
spellingShingle A kinetic modeling of the liquid-phase oxidation of lactose over Pt- and Au-supported catalysts
Meyer, Camilo Ignacio
Lactose
Lactobionic Acid
Noble Metal Catalyst
Kinetic Modeling
title_short A kinetic modeling of the liquid-phase oxidation of lactose over Pt- and Au-supported catalysts
title_full A kinetic modeling of the liquid-phase oxidation of lactose over Pt- and Au-supported catalysts
title_fullStr A kinetic modeling of the liquid-phase oxidation of lactose over Pt- and Au-supported catalysts
title_full_unstemmed A kinetic modeling of the liquid-phase oxidation of lactose over Pt- and Au-supported catalysts
title_sort A kinetic modeling of the liquid-phase oxidation of lactose over Pt- and Au-supported catalysts
dc.creator.none.fl_str_mv Meyer, Camilo Ignacio
Regenhardt, Silvina Andrea
Zelin, Juan
Sebastian, V.
Marchi, Alberto Julio
Garetto, Teresita Francisca
author Meyer, Camilo Ignacio
author_facet Meyer, Camilo Ignacio
Regenhardt, Silvina Andrea
Zelin, Juan
Sebastian, V.
Marchi, Alberto Julio
Garetto, Teresita Francisca
author_role author
author2 Regenhardt, Silvina Andrea
Zelin, Juan
Sebastian, V.
Marchi, Alberto Julio
Garetto, Teresita Francisca
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv Lactose
Lactobionic Acid
Noble Metal Catalyst
Kinetic Modeling
topic Lactose
Lactobionic Acid
Noble Metal Catalyst
Kinetic Modeling
purl_subject.fl_str_mv https://purl.org/becyt/ford/2.4
https://purl.org/becyt/ford/2
dc.description.none.fl_txt_mv Pt and Au catalysts, 2 wt% metal loading, supported on SiO2 and Al2O3 were used to study the effect of metal and support on the liquid-phase oxidation of lactose. Pt-based catalysts were prepared by incipient wetness impregnation while Au-based catalysts were obtained by the precipitation-deposition method. Catalytic tests were carried out in aqueous phase at 65 °C, using O2 as oxidizing agent and keeping pH constant at 9 by controlled addition of NaOH aqueous solution. In all of the cases, the only product of reaction detected and quantified was lactobionic acid. It was found that Pt supported on Al2O3 was more active than Pt supported on SiO2. This was explained on the basis that metal Pt dispersion on Al2O3 was three times higher than on SiO2. At the same time, Au/Al2O3 catalyst was more active than Pt/Al2O3 catalysts. The higher activity of Au/Al2O3 was attributed to Au nanoparticles interacting with the support, as determined by transmission electron microscopy. It was also verified that Au/Al2O3 activity was almost the same after two consecutive runs, indicating a good stability of the Au active phase. Kinetic studies were carried out by varying the initial concentration of lactose in the reaction mixture. A negative order respect to the reactant, determined applying a pseudo-homogeneous model, was estimated, which indicates that lactose molecules are strongly adsorbed on the surface of metal Au nanoparticles. A LHHW model, assuming that oxygen chemisorption was the controlling step, allowed to explain the negative order respect to lactose.
Fil: Meyer, Camilo Ignacio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica ; Argentina. Universidad Nacional del Litoral. Facultad de Ingeniería Química; Argentina
Fil: Regenhardt, Silvina Andrea. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica ; Argentina. Universidad Nacional del Litoral. Facultad de Ingeniería Química; Argentina
Fil: Zelin, Juan. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica ; Argentina
Fil: Sebastian, V.. Universidad de Zaragoza. Facultad de Ciencias; España
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. Universidad Nacional del Litoral. Facultad de Ingeniería Química; Argentina
Fil: Garetto, Teresita Francisca. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica ; Argentina. Universidad Nacional del Litoral. Facultad de Ingeniería Química; Argentina
description Pt and Au catalysts, 2 wt% metal loading, supported on SiO2 and Al2O3 were used to study the effect of metal and support on the liquid-phase oxidation of lactose. Pt-based catalysts were prepared by incipient wetness impregnation while Au-based catalysts were obtained by the precipitation-deposition method. Catalytic tests were carried out in aqueous phase at 65 °C, using O2 as oxidizing agent and keeping pH constant at 9 by controlled addition of NaOH aqueous solution. In all of the cases, the only product of reaction detected and quantified was lactobionic acid. It was found that Pt supported on Al2O3 was more active than Pt supported on SiO2. This was explained on the basis that metal Pt dispersion on Al2O3 was three times higher than on SiO2. At the same time, Au/Al2O3 catalyst was more active than Pt/Al2O3 catalysts. The higher activity of Au/Al2O3 was attributed to Au nanoparticles interacting with the support, as determined by transmission electron microscopy. It was also verified that Au/Al2O3 activity was almost the same after two consecutive runs, indicating a good stability of the Au active phase. Kinetic studies were carried out by varying the initial concentration of lactose in the reaction mixture. A negative order respect to the reactant, determined applying a pseudo-homogeneous model, was estimated, which indicates that lactose molecules are strongly adsorbed on the surface of metal Au nanoparticles. A LHHW model, assuming that oxygen chemisorption was the controlling step, allowed to explain the negative order respect to lactose.
publishDate 2015
dc.date.none.fl_str_mv 2015-04
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/11336/36817
Meyer, Camilo Ignacio; Regenhardt, Silvina Andrea; Zelin, Juan; Sebastian, V.; Marchi, Alberto Julio; et al.; A kinetic modeling of the liquid-phase oxidation of lactose over Pt- and Au-supported catalysts; Springer; Topics In Catalysis; 59; 2-4; 4-2015; 168-177
1022-5528
CONICET Digital
CONICET
url http://hdl.handle.net/11336/36817
identifier_str_mv Meyer, Camilo Ignacio; Regenhardt, Silvina Andrea; Zelin, Juan; Sebastian, V.; Marchi, Alberto Julio; et al.; A kinetic modeling of the liquid-phase oxidation of lactose over Pt- and Au-supported catalysts; Springer; Topics In Catalysis; 59; 2-4; 4-2015; 168-177
1022-5528
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1007/s11244-015-0427-4
info:eu-repo/semantics/altIdentifier/url/https://link.springer.com/article/10.1007/s11244-015-0427-4
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
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Springer
publisher.none.fl_str_mv Springer
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 13.070432

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