Potassium effect on the thermal stability and reactivity of NOx species adsorbed on Pt,Rh/La2O3 catalysts

Autores
Sanchez, Barbara Sabrina; Querini, Carlos Alberto; Miro, Eduardo Ernesto
Año de publicación
2011
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
In this paper we analyzed the effect of potassium on the thermal stability of NOx species adsorbed on lanthanum supported catalysts. Catalysts containing only noble metals (Pt and/or Rh) or noble metals and potassium were prepared. The soot combustion process in the presence of NOx species previously adsorbed on the catalysts has also been studied in order to evaluate the possibility of using these materials for the simultaneous abatement of soot and nitrogen oxides. It was shown that lanthanum supported catalysts containing Pt and/or Rh exhibited great capacity to decompose previously adsorbed nitrate species in an inert atmosphere. When potassium was added to the formulation this capacity was modified, which proves the existence of a strong interaction between the potassium and noble metals. Such interaction was much stronger in the case of platinum and, therefore, the Pt-K catalyst was able to decompose only a small fraction of the adsorbed compounds in helium stream. However, when decomposition took place in reducing atmosphere (H2), the NO x species were reduced at a lower temperature in the presence of platinum. For all the lanthanum supported catalysts under study, the activity for soot combustion increased in the presence of previously adsorbed nitrate species, even though some of the samples were not very effective for NO x decomposition. This indicates that NOx species are capable of reacting with soot in oxidant atmosphere without the need for their previous decomposition, as previously observed in an inert stream.
Fil: Sanchez, Barbara Sabrina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica "Ing. José Miguel Parera". Universidad Nacional del Litoral. Instituto de Investigaciones en Catálisis y Petroquímica "Ing. José Miguel Parera"; Argentina
Fil: Querini, Carlos Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica "Ing. José Miguel Parera". Universidad Nacional del Litoral. Instituto de Investigaciones en Catálisis y Petroquímica "Ing. José Miguel Parera"; Argentina
Fil: Miro, Eduardo Ernesto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica "Ing. José Miguel Parera". Universidad Nacional del Litoral. Instituto de Investigaciones en Catálisis y Petroquímica "Ing. José Miguel Parera"; Argentina
Materia
Nox Reduction
Potassium
Pt
Rh
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/54015
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/54015
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Potassium effect on the thermal stability and reactivity of NOx species adsorbed on Pt,Rh/La2O3 catalystsSanchez, Barbara SabrinaQuerini, Carlos AlbertoMiro, Eduardo ErnestoNox ReductionPotassiumPtRhhttps://purl.org/becyt/ford/2.4https://purl.org/becyt/ford/2In this paper we analyzed the effect of potassium on the thermal stability of NOx species adsorbed on lanthanum supported catalysts. Catalysts containing only noble metals (Pt and/or Rh) or noble metals and potassium were prepared. The soot combustion process in the presence of NOx species previously adsorbed on the catalysts has also been studied in order to evaluate the possibility of using these materials for the simultaneous abatement of soot and nitrogen oxides. It was shown that lanthanum supported catalysts containing Pt and/or Rh exhibited great capacity to decompose previously adsorbed nitrate species in an inert atmosphere. When potassium was added to the formulation this capacity was modified, which proves the existence of a strong interaction between the potassium and noble metals. Such interaction was much stronger in the case of platinum and, therefore, the Pt-K catalyst was able to decompose only a small fraction of the adsorbed compounds in helium stream. However, when decomposition took place in reducing atmosphere (H2), the NO x species were reduced at a lower temperature in the presence of platinum. For all the lanthanum supported catalysts under study, the activity for soot combustion increased in the presence of previously adsorbed nitrate species, even though some of the samples were not very effective for NO x decomposition. This indicates that NOx species are capable of reacting with soot in oxidant atmosphere without the need for their previous decomposition, as previously observed in an inert stream.Fil: Sanchez, Barbara Sabrina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica "Ing. José Miguel Parera". Universidad Nacional del Litoral. Instituto de Investigaciones en Catálisis y Petroquímica "Ing. José Miguel Parera"; ArgentinaFil: Querini, Carlos Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica "Ing. José Miguel Parera". Universidad Nacional del Litoral. Instituto de Investigaciones en Catálisis y Petroquímica "Ing. José Miguel Parera"; ArgentinaFil: Miro, Eduardo Ernesto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica "Ing. José Miguel Parera". Universidad Nacional del Litoral. Instituto de Investigaciones en Catálisis y Petroquímica "Ing. José Miguel Parera"; ArgentinaElsevier Science2011-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/54015Sanchez, Barbara Sabrina; Querini, Carlos Alberto; Miro, Eduardo Ernesto; Potassium effect on the thermal stability and reactivity of NOx species adsorbed on Pt,Rh/La2O3 catalysts; Elsevier Science; Applied Catalysis A: General; 392; 1-2; 1-2011; 158-1650926-860XCONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.apcata.2010.11.003info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0926860X10007568info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-nd/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-22T11:34:08Zoai:ri.conicet.gov.ar:11336/54015instacron: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:34982025-10-22 11:34:09.133CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Potassium effect on the thermal stability and reactivity of NOx species adsorbed on Pt,Rh/La2O3 catalysts
title Potassium effect on the thermal stability and reactivity of NOx species adsorbed on Pt,Rh/La2O3 catalysts
spellingShingle Potassium effect on the thermal stability and reactivity of NOx species adsorbed on Pt,Rh/La2O3 catalysts
Sanchez, Barbara Sabrina
Nox Reduction
Potassium
Pt
Rh
title_short Potassium effect on the thermal stability and reactivity of NOx species adsorbed on Pt,Rh/La2O3 catalysts
title_full Potassium effect on the thermal stability and reactivity of NOx species adsorbed on Pt,Rh/La2O3 catalysts
title_fullStr Potassium effect on the thermal stability and reactivity of NOx species adsorbed on Pt,Rh/La2O3 catalysts
title_full_unstemmed Potassium effect on the thermal stability and reactivity of NOx species adsorbed on Pt,Rh/La2O3 catalysts
title_sort Potassium effect on the thermal stability and reactivity of NOx species adsorbed on Pt,Rh/La2O3 catalysts
dc.creator.none.fl_str_mv Sanchez, Barbara Sabrina
Querini, Carlos Alberto
Miro, Eduardo Ernesto
author Sanchez, Barbara Sabrina
author_facet Sanchez, Barbara Sabrina
Querini, Carlos Alberto
Miro, Eduardo Ernesto
author_role author
author2 Querini, Carlos Alberto
Miro, Eduardo Ernesto
author2_role author
author
dc.subject.none.fl_str_mv Nox Reduction
Potassium
Pt
Rh
topic Nox Reduction
Potassium
Pt
Rh
purl_subject.fl_str_mv https://purl.org/becyt/ford/2.4
https://purl.org/becyt/ford/2
dc.description.none.fl_txt_mv In this paper we analyzed the effect of potassium on the thermal stability of NOx species adsorbed on lanthanum supported catalysts. Catalysts containing only noble metals (Pt and/or Rh) or noble metals and potassium were prepared. The soot combustion process in the presence of NOx species previously adsorbed on the catalysts has also been studied in order to evaluate the possibility of using these materials for the simultaneous abatement of soot and nitrogen oxides. It was shown that lanthanum supported catalysts containing Pt and/or Rh exhibited great capacity to decompose previously adsorbed nitrate species in an inert atmosphere. When potassium was added to the formulation this capacity was modified, which proves the existence of a strong interaction between the potassium and noble metals. Such interaction was much stronger in the case of platinum and, therefore, the Pt-K catalyst was able to decompose only a small fraction of the adsorbed compounds in helium stream. However, when decomposition took place in reducing atmosphere (H2), the NO x species were reduced at a lower temperature in the presence of platinum. For all the lanthanum supported catalysts under study, the activity for soot combustion increased in the presence of previously adsorbed nitrate species, even though some of the samples were not very effective for NO x decomposition. This indicates that NOx species are capable of reacting with soot in oxidant atmosphere without the need for their previous decomposition, as previously observed in an inert stream.
Fil: Sanchez, Barbara Sabrina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica "Ing. José Miguel Parera". Universidad Nacional del Litoral. Instituto de Investigaciones en Catálisis y Petroquímica "Ing. José Miguel Parera"; Argentina
Fil: Querini, Carlos Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica "Ing. José Miguel Parera". Universidad Nacional del Litoral. Instituto de Investigaciones en Catálisis y Petroquímica "Ing. José Miguel Parera"; Argentina
Fil: Miro, Eduardo Ernesto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica "Ing. José Miguel Parera". Universidad Nacional del Litoral. Instituto de Investigaciones en Catálisis y Petroquímica "Ing. José Miguel Parera"; Argentina
description In this paper we analyzed the effect of potassium on the thermal stability of NOx species adsorbed on lanthanum supported catalysts. Catalysts containing only noble metals (Pt and/or Rh) or noble metals and potassium were prepared. The soot combustion process in the presence of NOx species previously adsorbed on the catalysts has also been studied in order to evaluate the possibility of using these materials for the simultaneous abatement of soot and nitrogen oxides. It was shown that lanthanum supported catalysts containing Pt and/or Rh exhibited great capacity to decompose previously adsorbed nitrate species in an inert atmosphere. When potassium was added to the formulation this capacity was modified, which proves the existence of a strong interaction between the potassium and noble metals. Such interaction was much stronger in the case of platinum and, therefore, the Pt-K catalyst was able to decompose only a small fraction of the adsorbed compounds in helium stream. However, when decomposition took place in reducing atmosphere (H2), the NO x species were reduced at a lower temperature in the presence of platinum. For all the lanthanum supported catalysts under study, the activity for soot combustion increased in the presence of previously adsorbed nitrate species, even though some of the samples were not very effective for NO x decomposition. This indicates that NOx species are capable of reacting with soot in oxidant atmosphere without the need for their previous decomposition, as previously observed in an inert stream.
publishDate 2011
dc.date.none.fl_str_mv 2011-01
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/11336/54015
Sanchez, Barbara Sabrina; Querini, Carlos Alberto; Miro, Eduardo Ernesto; Potassium effect on the thermal stability and reactivity of NOx species adsorbed on Pt,Rh/La2O3 catalysts; Elsevier Science; Applied Catalysis A: General; 392; 1-2; 1-2011; 158-165
0926-860X
CONICET Digital
CONICET
url http://hdl.handle.net/11336/54015
identifier_str_mv Sanchez, Barbara Sabrina; Querini, Carlos Alberto; Miro, Eduardo Ernesto; Potassium effect on the thermal stability and reactivity of NOx species adsorbed on Pt,Rh/La2O3 catalysts; Elsevier Science; Applied Catalysis A: General; 392; 1-2; 1-2011; 158-165
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.2010.11.003
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0926860X10007568
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
dc.format.none.fl_str_mv 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 12.982451

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