NOx trapping and soot combustion on BaCoO3-y perovskite: LRS and FTIR characterization

Autores
Milt, Viviana Guadalupe; Ulla, Maria Alicia del H.; Miro, Eduardo Ernesto
Año de publicación
2005
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The BaCoO3-y perovskite-type mixed oxide is studied for both trapping of NOx and combustion of diesel soot. The starting material consists of a stoichiometric mixture of Ba and Co nitrates. Different crystalline phases are obtained when the solids are calcined at different temperatures (ranging from 400 to 1000°C). After 400°C calcination Ba(NO3)2 and Co3O4 crystalline phases are formed, while after calcination at 700°C the BaCoO3 stoichiometric perovskite is obtained. However, when the temperature is increased to 1000°C, the structure loses oxygen and perovskite BaCoO 2.74 is formed. The solids calcined at 700 and 1000°C show high NOx adsorption capacity, the latter being more effective. This solid shows weak IR bands in the 800 cm-1 frequency region associated with the perovskite structure. After the catalyst interacts with NOx, new bands associated with bulk nitrates and surface NO3- species are observed. Signals associated with surface N-bounded species of the OBaNO2 type could be masked by the intense Ba(NO3) 2 signals. LRS characterization is in agreement with XRD and FTIR results. The Raman signal at 716 cm-1 is associated with the BaCoO2.74 structure while a broad signal at 607 cm-1 appears in samples containing BaCoO3 and BaCoO2.94 phases. Nitrates formed upon NO + O2 treatments show high thermal stability under He atmosphere up to 490°C. However, reductive treatments either under H2 atmosphere or with soot particles cause decomposition of the nitrates at temperatures lower than 400°C. A reaction scheme is proposed involving the participation of perovskite structures, Co3O 4, Ba(NO3)2, BaO and metallic Co particles. The catalyst under study favors the reaction between the soot particles and the trapped NOx species making this system promising for the simultaneous abatement of both contaminants. The addition of K decreases the soot combustion temperature.
Fil: Milt, Viviana Guadalupe. 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: 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
BACOO3-Y PEROVSKITE
CATALYTIC TRAP
DIESEL POLLUTANTS
NOX TRAPPING
SOOT COMBUSTION
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:11336/73021
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/73021
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling NOx trapping and soot combustion on BaCoO3-y perovskite: LRS and FTIR characterizationMilt, Viviana GuadalupeUlla, Maria Alicia del H.Miro, Eduardo ErnestoBACOO3-Y PEROVSKITECATALYTIC TRAPDIESEL POLLUTANTSNOX TRAPPINGSOOT COMBUSTIONhttps://purl.org/becyt/ford/2.4https://purl.org/becyt/ford/2The BaCoO3-y perovskite-type mixed oxide is studied for both trapping of NOx and combustion of diesel soot. The starting material consists of a stoichiometric mixture of Ba and Co nitrates. Different crystalline phases are obtained when the solids are calcined at different temperatures (ranging from 400 to 1000°C). After 400°C calcination Ba(NO3)2 and Co3O4 crystalline phases are formed, while after calcination at 700°C the BaCoO3 stoichiometric perovskite is obtained. However, when the temperature is increased to 1000°C, the structure loses oxygen and perovskite BaCoO 2.74 is formed. The solids calcined at 700 and 1000°C show high NOx adsorption capacity, the latter being more effective. This solid shows weak IR bands in the 800 cm-1 frequency region associated with the perovskite structure. After the catalyst interacts with NOx, new bands associated with bulk nitrates and surface NO3- species are observed. Signals associated with surface N-bounded species of the OBaNO2 type could be masked by the intense Ba(NO3) 2 signals. LRS characterization is in agreement with XRD and FTIR results. The Raman signal at 716 cm-1 is associated with the BaCoO2.74 structure while a broad signal at 607 cm-1 appears in samples containing BaCoO3 and BaCoO2.94 phases. Nitrates formed upon NO + O2 treatments show high thermal stability under He atmosphere up to 490°C. However, reductive treatments either under H2 atmosphere or with soot particles cause decomposition of the nitrates at temperatures lower than 400°C. A reaction scheme is proposed involving the participation of perovskite structures, Co3O 4, Ba(NO3)2, BaO and metallic Co particles. The catalyst under study favors the reaction between the soot particles and the trapped NOx species making this system promising for the simultaneous abatement of both contaminants. The addition of K decreases the soot combustion temperature.Fil: Milt, Viviana Guadalupe. 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: 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 Science2005-04info: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/11336/73021Milt, Viviana Guadalupe; Ulla, Maria Alicia del H.; Miro, Eduardo Ernesto; NOx trapping and soot combustion on BaCoO3-y perovskite: LRS and FTIR characterization; Elsevier Science; Applied Catalysis B: Environmental; 57; 1; 4-2005; 13-210926-3373CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.apcatb.2004.09.022info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-15T15:23:46Zoai:ri.conicet.gov.ar:11336/73021instacron: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:34982025-10-15 15:23:46.335CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv NOx trapping and soot combustion on BaCoO3-y perovskite: LRS and FTIR characterization
title NOx trapping and soot combustion on BaCoO3-y perovskite: LRS and FTIR characterization
spellingShingle NOx trapping and soot combustion on BaCoO3-y perovskite: LRS and FTIR characterization
Milt, Viviana Guadalupe
BACOO3-Y PEROVSKITE
CATALYTIC TRAP
DIESEL POLLUTANTS
NOX TRAPPING
SOOT COMBUSTION
title_short NOx trapping and soot combustion on BaCoO3-y perovskite: LRS and FTIR characterization
title_full NOx trapping and soot combustion on BaCoO3-y perovskite: LRS and FTIR characterization
title_fullStr NOx trapping and soot combustion on BaCoO3-y perovskite: LRS and FTIR characterization
title_full_unstemmed NOx trapping and soot combustion on BaCoO3-y perovskite: LRS and FTIR characterization
title_sort NOx trapping and soot combustion on BaCoO3-y perovskite: LRS and FTIR characterization
dc.creator.none.fl_str_mv Milt, Viviana Guadalupe
Ulla, Maria Alicia del H.
Miro, Eduardo Ernesto
author Milt, Viviana Guadalupe
author_facet Milt, Viviana Guadalupe
Ulla, Maria Alicia del H.
Miro, Eduardo Ernesto
author_role author
author2 Ulla, Maria Alicia del H.
Miro, Eduardo Ernesto
author2_role author
author
dc.subject.none.fl_str_mv BACOO3-Y PEROVSKITE
CATALYTIC TRAP
DIESEL POLLUTANTS
NOX TRAPPING
SOOT COMBUSTION
topic BACOO3-Y PEROVSKITE
CATALYTIC TRAP
DIESEL POLLUTANTS
NOX TRAPPING
SOOT COMBUSTION
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 BaCoO3-y perovskite-type mixed oxide is studied for both trapping of NOx and combustion of diesel soot. The starting material consists of a stoichiometric mixture of Ba and Co nitrates. Different crystalline phases are obtained when the solids are calcined at different temperatures (ranging from 400 to 1000°C). After 400°C calcination Ba(NO3)2 and Co3O4 crystalline phases are formed, while after calcination at 700°C the BaCoO3 stoichiometric perovskite is obtained. However, when the temperature is increased to 1000°C, the structure loses oxygen and perovskite BaCoO 2.74 is formed. The solids calcined at 700 and 1000°C show high NOx adsorption capacity, the latter being more effective. This solid shows weak IR bands in the 800 cm-1 frequency region associated with the perovskite structure. After the catalyst interacts with NOx, new bands associated with bulk nitrates and surface NO3- species are observed. Signals associated with surface N-bounded species of the OBaNO2 type could be masked by the intense Ba(NO3) 2 signals. LRS characterization is in agreement with XRD and FTIR results. The Raman signal at 716 cm-1 is associated with the BaCoO2.74 structure while a broad signal at 607 cm-1 appears in samples containing BaCoO3 and BaCoO2.94 phases. Nitrates formed upon NO + O2 treatments show high thermal stability under He atmosphere up to 490°C. However, reductive treatments either under H2 atmosphere or with soot particles cause decomposition of the nitrates at temperatures lower than 400°C. A reaction scheme is proposed involving the participation of perovskite structures, Co3O 4, Ba(NO3)2, BaO and metallic Co particles. The catalyst under study favors the reaction between the soot particles and the trapped NOx species making this system promising for the simultaneous abatement of both contaminants. The addition of K decreases the soot combustion temperature.
Fil: Milt, Viviana Guadalupe. 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: 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 The BaCoO3-y perovskite-type mixed oxide is studied for both trapping of NOx and combustion of diesel soot. The starting material consists of a stoichiometric mixture of Ba and Co nitrates. Different crystalline phases are obtained when the solids are calcined at different temperatures (ranging from 400 to 1000°C). After 400°C calcination Ba(NO3)2 and Co3O4 crystalline phases are formed, while after calcination at 700°C the BaCoO3 stoichiometric perovskite is obtained. However, when the temperature is increased to 1000°C, the structure loses oxygen and perovskite BaCoO 2.74 is formed. The solids calcined at 700 and 1000°C show high NOx adsorption capacity, the latter being more effective. This solid shows weak IR bands in the 800 cm-1 frequency region associated with the perovskite structure. After the catalyst interacts with NOx, new bands associated with bulk nitrates and surface NO3- species are observed. Signals associated with surface N-bounded species of the OBaNO2 type could be masked by the intense Ba(NO3) 2 signals. LRS characterization is in agreement with XRD and FTIR results. The Raman signal at 716 cm-1 is associated with the BaCoO2.74 structure while a broad signal at 607 cm-1 appears in samples containing BaCoO3 and BaCoO2.94 phases. Nitrates formed upon NO + O2 treatments show high thermal stability under He atmosphere up to 490°C. However, reductive treatments either under H2 atmosphere or with soot particles cause decomposition of the nitrates at temperatures lower than 400°C. A reaction scheme is proposed involving the participation of perovskite structures, Co3O 4, Ba(NO3)2, BaO and metallic Co particles. The catalyst under study favors the reaction between the soot particles and the trapped NOx species making this system promising for the simultaneous abatement of both contaminants. The addition of K decreases the soot combustion temperature.
publishDate 2005
dc.date.none.fl_str_mv 2005-04
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/11336/73021
Milt, Viviana Guadalupe; Ulla, Maria Alicia del H.; Miro, Eduardo Ernesto; NOx trapping and soot combustion on BaCoO3-y perovskite: LRS and FTIR characterization; Elsevier Science; Applied Catalysis B: Environmental; 57; 1; 4-2005; 13-21
0926-3373
CONICET Digital
CONICET
url http://hdl.handle.net/11336/73021
identifier_str_mv Milt, Viviana Guadalupe; Ulla, Maria Alicia del H.; Miro, Eduardo Ernesto; NOx trapping and soot combustion on BaCoO3-y perovskite: LRS and FTIR characterization; Elsevier Science; Applied Catalysis B: Environmental; 57; 1; 4-2005; 13-21
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.2004.09.022
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
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 13.22299

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