Deep oxidation of propane on Pt-supported catalysts: Drastic turnover rate enhancement using zeolite supports

The combustion of propane was studied on Pt supported on MgO, alumina, and zeolites KL, HY, ZSM5 and Beta. Samples contained a similar amount of Pt, between 0.32 and 0.44%, and were characterized by employing a variety of physical and spectroscopic techniques. The catalyst activities were evaluated...

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Detalles Bibliográficos
Autores: Garetto, Teresita Francisca, Rincon, Eduardo Ricardo, Apesteguia, Carlos Rodolfo
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2004
País:Argentina
Institución:Consejo Nacional de Investigaciones Científicas y Técnicas
Repositorio:CONICET Digital (CONICET)
Idioma:inglés
OAI Identifier:oai:ri.conicet.gov.ar:11336/55840
Acceso en línea:http://hdl.handle.net/11336/55840
Access Level:acceso abierto
Palabra clave:Propane Combustion
Pt Catalysts
Acid Zeolites
https://purl.org/becyt/ford/2.4
https://purl.org/becyt/ford/2
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network_acronym_str AR
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spelling Deep oxidation of propane on Pt-supported catalysts: Drastic turnover rate enhancement using zeolite supportsGaretto, Teresita FranciscaRincon, Eduardo RicardoApesteguia, Carlos RodolfoPropane CombustionPt CatalystsAcid Zeoliteshttps://purl.org/becyt/ford/2.4https://purl.org/becyt/ford/2The combustion of propane was studied on Pt supported on MgO, alumina, and zeolites KL, HY, ZSM5 and Beta. Samples contained a similar amount of Pt, between 0.32 and 0.44%, and were characterized by employing a variety of physical and spectroscopic techniques. The catalyst activities were evaluated through both conversion versus temperature (light-off curves) and conversion versus time catalytic tests. Kinetic studies showed that the reaction is first order in propane, and zero (Pt/Al2O3, Pt/MgO) or negative (Pt/zeolites) orders in oxygen. Apparent activation energies (Ea) and pre-exponential factors (A) were determined and it was verified that the experimental data obey a Constable relation (ln A = mEa + c). Pt/Al2O3 catalysts of different metallic dispersions were prepared for investigating the effect of Pt crystallite size on combustion activity. It was found that propane oxidation is a structure insensitive reaction on Pt/Al2O3. Propane oxidation turnover rates (TOF) followed the order: Pt/MgO < Pt/Al2O3 Pt/KL < Pt/HY ≤ Pt/ZSM5 < Pt/Beta. The TOF values on Pt/acid zeolites were more than two orders of magnitude higher than on Pt/Al2O3. Propane oxidation activity was also significantly higher on Pt/KL as compared to Pt/Al2O3, despite that Al2O3 and zeolite KL supports exhibited similar acid sites density and strength. This result showed that the support acid strength did not have a major influence on propane combustion activity. Areal propane uptake was more than one order of magnitude higher on Pt/zeolites than on Pt/Al2O3 and this drastic increase in the density of propane adsorbed species may promote the alkane oxidation rate. It is proposed that the enhanced combustion activity obtained on Pt/zeolites is associated with an additional oxidation pathway from propane adsorbing on the metal-oxide interface region and reacting with oxygen spilled-over from the metal surface.Fil: Garetto, Teresita Francisca. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica ; ArgentinaFil: Rincon, Eduardo Ricardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica ; ArgentinaFil: Apesteguia, Carlos Rodolfo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica ; ArgentinaElsevier Science2004-03info: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/11336/55840Garetto, Teresita Francisca; Rincon, Eduardo Ricardo; Apesteguia, Carlos Rodolfo; Deep oxidation of propane on Pt-supported catalysts: Drastic turnover rate enhancement using zeolite supports; Elsevier Science; Applied Catalysis B: Environmental; 48; 3; 3-2004; 167-1740926-3373CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/http://dx.doi.org/10.1016/j.apcatb.2003.10.004info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2024-05-08T14:08:45Zoai:ri.conicet.gov.ar:11336/55840instacron: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:34982024-05-08 14:08:45.454CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Deep oxidation of propane on Pt-supported catalysts: Drastic turnover rate enhancement using zeolite supports
title Deep oxidation of propane on Pt-supported catalysts: Drastic turnover rate enhancement using zeolite supports
spellingShingle Deep oxidation of propane on Pt-supported catalysts: Drastic turnover rate enhancement using zeolite supports
Garetto, Teresita Francisca
Propane Combustion
Pt Catalysts
Acid Zeolites
https://purl.org/becyt/ford/2.4
https://purl.org/becyt/ford/2
title_short Deep oxidation of propane on Pt-supported catalysts: Drastic turnover rate enhancement using zeolite supports
title_full Deep oxidation of propane on Pt-supported catalysts: Drastic turnover rate enhancement using zeolite supports
title_fullStr Deep oxidation of propane on Pt-supported catalysts: Drastic turnover rate enhancement using zeolite supports
title_full_unstemmed Deep oxidation of propane on Pt-supported catalysts: Drastic turnover rate enhancement using zeolite supports
title_sort Deep oxidation of propane on Pt-supported catalysts: Drastic turnover rate enhancement using zeolite supports
dc.creator.none.fl_str_mv Garetto, Teresita Francisca
Rincon, Eduardo Ricardo
Apesteguia, Carlos Rodolfo
author Garetto, Teresita Francisca
author_facet Garetto, Teresita Francisca
Rincon, Eduardo Ricardo
Apesteguia, Carlos Rodolfo
author_role author
author2 Rincon, Eduardo Ricardo
Apesteguia, Carlos Rodolfo
author2_role author
author
dc.subject.none.fl_str_mv Propane Combustion
Pt Catalysts
Acid Zeolites
https://purl.org/becyt/ford/2.4
https://purl.org/becyt/ford/2
topic Propane Combustion
Pt Catalysts
Acid Zeolites
https://purl.org/becyt/ford/2.4
https://purl.org/becyt/ford/2
description The combustion of propane was studied on Pt supported on MgO, alumina, and zeolites KL, HY, ZSM5 and Beta. Samples contained a similar amount of Pt, between 0.32 and 0.44%, and were characterized by employing a variety of physical and spectroscopic techniques. The catalyst activities were evaluated through both conversion versus temperature (light-off curves) and conversion versus time catalytic tests. Kinetic studies showed that the reaction is first order in propane, and zero (Pt/Al2O3, Pt/MgO) or negative (Pt/zeolites) orders in oxygen. Apparent activation energies (Ea) and pre-exponential factors (A) were determined and it was verified that the experimental data obey a Constable relation (ln A = mEa + c). Pt/Al2O3 catalysts of different metallic dispersions were prepared for investigating the effect of Pt crystallite size on combustion activity. It was found that propane oxidation is a structure insensitive reaction on Pt/Al2O3. Propane oxidation turnover rates (TOF) followed the order: Pt/MgO < Pt/Al2O3 Pt/KL < Pt/HY ≤ Pt/ZSM5 < Pt/Beta. The TOF values on Pt/acid zeolites were more than two orders of magnitude higher than on Pt/Al2O3. Propane oxidation activity was also significantly higher on Pt/KL as compared to Pt/Al2O3, despite that Al2O3 and zeolite KL supports exhibited similar acid sites density and strength. This result showed that the support acid strength did not have a major influence on propane combustion activity. Areal propane uptake was more than one order of magnitude higher on Pt/zeolites than on Pt/Al2O3 and this drastic increase in the density of propane adsorbed species may promote the alkane oxidation rate. It is proposed that the enhanced combustion activity obtained on Pt/zeolites is associated with an additional oxidation pathway from propane adsorbing on the metal-oxide interface region and reacting with oxygen spilled-over from the metal surface.
publishDate 2004
dc.date.none.fl_str_mv 2004-03
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/11336/55840
Garetto, Teresita Francisca; Rincon, Eduardo Ricardo; Apesteguia, Carlos Rodolfo; Deep oxidation of propane on Pt-supported catalysts: Drastic turnover rate enhancement using zeolite supports; Elsevier Science; Applied Catalysis B: Environmental; 48; 3; 3-2004; 167-174
0926-3373
CONICET Digital
CONICET
url http://hdl.handle.net/11336/55840
identifier_str_mv Garetto, Teresita Francisca; Rincon, Eduardo Ricardo; Apesteguia, Carlos Rodolfo; Deep oxidation of propane on Pt-supported catalysts: Drastic turnover rate enhancement using zeolite supports; Elsevier Science; Applied Catalysis B: Environmental; 48; 3; 3-2004; 167-174
0926-3373
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/http://dx.doi.org/10.1016/j.apcatb.2003.10.004
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
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
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 15.811543

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