Diesel soot and NOx abatement: K/La2O3 catalyst stability

Autores
Peralta, María Ariela; Ulla, Maria Alicia del H.; Querini, Carlos Alberto
Año de publicación
2010
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Soot particles and nitrogen oxides are the main pollutants emitted by a diesel engine. In this work, the activity and the stability of the KOH/La2O3 catalyst are studied. This catalyst is able to adsorb NOx, which is a good property for the catalyst in order to be used as a NOx trap. In addition, it is active for soot combustion as determined by temperature-programmed oxidation analyses. FTIR, XRD, CO2-TPD, Pulses of CO2, and BET techniques are used in order to characterize the catalysts. The catalytic surface composition depends upon the relative partial pressures of H2O, CO2, NO and O2. Despite the different surface compositions, the catalytic activity remains quite stable, under operation conditions similar to those of a real diesel exhaust. High temperature treatments, such as 800°C, and especially in the presence of water, leads to an irreversible catalyst deactivation due to potassium volatilization. The water condensed on the catalyst, could wash-out a fraction of the potassium from the outer surface, leading to a decrease in activity. However, when the catalyst is treated at 400°C, potassium diffuses from inside the pores to the external surface, thus recovering activity for soot combustion.
Fil: Peralta, María Ariela. 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: Ulla, Maria Alicia del H.. 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
Materia
Deactivation Mechanism
Diesel Soot
Lanthanum
Potassium
Stability
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:11336/74169
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/74169
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Diesel soot and NOx abatement: K/La2O3 catalyst stabilityPeralta, María ArielaUlla, Maria Alicia del H.Querini, Carlos AlbertoDeactivation MechanismDiesel SootLanthanumPotassiumStabilityhttps://purl.org/becyt/ford/2.4https://purl.org/becyt/ford/2Soot particles and nitrogen oxides are the main pollutants emitted by a diesel engine. In this work, the activity and the stability of the KOH/La2O3 catalyst are studied. This catalyst is able to adsorb NOx, which is a good property for the catalyst in order to be used as a NOx trap. In addition, it is active for soot combustion as determined by temperature-programmed oxidation analyses. FTIR, XRD, CO2-TPD, Pulses of CO2, and BET techniques are used in order to characterize the catalysts. The catalytic surface composition depends upon the relative partial pressures of H2O, CO2, NO and O2. Despite the different surface compositions, the catalytic activity remains quite stable, under operation conditions similar to those of a real diesel exhaust. High temperature treatments, such as 800°C, and especially in the presence of water, leads to an irreversible catalyst deactivation due to potassium volatilization. The water condensed on the catalyst, could wash-out a fraction of the potassium from the outer surface, leading to a decrease in activity. However, when the catalyst is treated at 400°C, potassium diffuses from inside the pores to the external surface, thus recovering activity for soot combustion.Fil: Peralta, María Ariela. 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: Ulla, Maria Alicia del H.. 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"; ArgentinaElsevier Science2010-11info: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/11336/74169Peralta, María Ariela; Ulla, Maria Alicia del H.; Querini, Carlos Alberto; Diesel soot and NOx abatement: K/La2O3 catalyst stability; Elsevier Science; Applied Catalysis B: Environmental; 101; 1-2; 11-2010; 38-440926-3373CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.apcatb.2010.08.031info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0926337310003930info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-nd/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-10T13:06:40Zoai:ri.conicet.gov.ar:11336/74169instacron: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:34982025-09-10 13:06:40.745CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Diesel soot and NOx abatement: K/La2O3 catalyst stability
title Diesel soot and NOx abatement: K/La2O3 catalyst stability
spellingShingle Diesel soot and NOx abatement: K/La2O3 catalyst stability
Peralta, María Ariela
Deactivation Mechanism
Diesel Soot
Lanthanum
Potassium
Stability
title_short Diesel soot and NOx abatement: K/La2O3 catalyst stability
title_full Diesel soot and NOx abatement: K/La2O3 catalyst stability
title_fullStr Diesel soot and NOx abatement: K/La2O3 catalyst stability
title_full_unstemmed Diesel soot and NOx abatement: K/La2O3 catalyst stability
title_sort Diesel soot and NOx abatement: K/La2O3 catalyst stability
dc.creator.none.fl_str_mv Peralta, María Ariela
Ulla, Maria Alicia del H.
Querini, Carlos Alberto
author Peralta, María Ariela
author_facet Peralta, María Ariela
Ulla, Maria Alicia del H.
Querini, Carlos Alberto
author_role author
author2 Ulla, Maria Alicia del H.
Querini, Carlos Alberto
author2_role author
author
dc.subject.none.fl_str_mv Deactivation Mechanism
Diesel Soot
Lanthanum
Potassium
Stability
topic Deactivation Mechanism
Diesel Soot
Lanthanum
Potassium
Stability
purl_subject.fl_str_mv https://purl.org/becyt/ford/2.4
https://purl.org/becyt/ford/2
dc.description.none.fl_txt_mv Soot particles and nitrogen oxides are the main pollutants emitted by a diesel engine. In this work, the activity and the stability of the KOH/La2O3 catalyst are studied. This catalyst is able to adsorb NOx, which is a good property for the catalyst in order to be used as a NOx trap. In addition, it is active for soot combustion as determined by temperature-programmed oxidation analyses. FTIR, XRD, CO2-TPD, Pulses of CO2, and BET techniques are used in order to characterize the catalysts. The catalytic surface composition depends upon the relative partial pressures of H2O, CO2, NO and O2. Despite the different surface compositions, the catalytic activity remains quite stable, under operation conditions similar to those of a real diesel exhaust. High temperature treatments, such as 800°C, and especially in the presence of water, leads to an irreversible catalyst deactivation due to potassium volatilization. The water condensed on the catalyst, could wash-out a fraction of the potassium from the outer surface, leading to a decrease in activity. However, when the catalyst is treated at 400°C, potassium diffuses from inside the pores to the external surface, thus recovering activity for soot combustion.
Fil: Peralta, María Ariela. 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: Ulla, Maria Alicia del H.. 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
description Soot particles and nitrogen oxides are the main pollutants emitted by a diesel engine. In this work, the activity and the stability of the KOH/La2O3 catalyst are studied. This catalyst is able to adsorb NOx, which is a good property for the catalyst in order to be used as a NOx trap. In addition, it is active for soot combustion as determined by temperature-programmed oxidation analyses. FTIR, XRD, CO2-TPD, Pulses of CO2, and BET techniques are used in order to characterize the catalysts. The catalytic surface composition depends upon the relative partial pressures of H2O, CO2, NO and O2. Despite the different surface compositions, the catalytic activity remains quite stable, under operation conditions similar to those of a real diesel exhaust. High temperature treatments, such as 800°C, and especially in the presence of water, leads to an irreversible catalyst deactivation due to potassium volatilization. The water condensed on the catalyst, could wash-out a fraction of the potassium from the outer surface, leading to a decrease in activity. However, when the catalyst is treated at 400°C, potassium diffuses from inside the pores to the external surface, thus recovering activity for soot combustion.
publishDate 2010
dc.date.none.fl_str_mv 2010-11
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/11336/74169
Peralta, María Ariela; Ulla, Maria Alicia del H.; Querini, Carlos Alberto; Diesel soot and NOx abatement: K/La2O3 catalyst stability; Elsevier Science; Applied Catalysis B: Environmental; 101; 1-2; 11-2010; 38-44
0926-3373
CONICET Digital
CONICET
url http://hdl.handle.net/11336/74169
identifier_str_mv Peralta, María Ariela; Ulla, Maria Alicia del H.; Querini, Carlos Alberto; Diesel soot and NOx abatement: K/La2O3 catalyst stability; Elsevier Science; Applied Catalysis B: Environmental; 101; 1-2; 11-2010; 38-44
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/doi/10.1016/j.apcatb.2010.08.031
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0926337310003930
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
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 12.993085

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