Deep oxidation of propane on Pt-supported catalysts: Drastic turnover rate enhancement using zeolite supports
- Autores
- Garetto, Teresita Francisca; Rincon, Eduardo Ricardo; Apesteguia, Carlos Rodolfo
- Año de publicación
- 2004
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- 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.
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
Fil: Rincon, Eduardo Ricardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica ; Argentina
Fil: Apesteguia, Carlos Rodolfo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica ; Argentina - Materia
-
Propane Combustion
Pt Catalysts
Acid Zeolites - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
- Repositorio
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/55840
Ver los metadatos del registro completo
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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 Técnicas2025-09-29T10:20:31Zoai: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:34982025-09-29 10:20:31.329CONICET 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 |
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 |
topic |
Propane Combustion Pt Catalysts Acid Zeolites |
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 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 ; Argentina Fil: Rincon, Eduardo Ricardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica ; Argentina Fil: Apesteguia, Carlos Rodolfo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica ; Argentina |
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 |
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CONICET Digital (CONICET) |
collection |
CONICET Digital (CONICET) |
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Consejo Nacional de Investigaciones Científicas y Técnicas |
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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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13.070432 |