Effect of barium and lanthanum oxides on the properties of Pt/KL catalysts in the n-heptane dehydrocyclization

Autores
Grau, Javier Mario; Gómez Sainero, L. M.; Daza, L.; Seoane, X.L.; Arcoya, A.
Año de publicación
2000
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Six fractions of zeolite KL were impregned with 1, 3 and 5 wt% of Ba or La, respectively, with nitrate precursors aqueous solutions. After calcination at 873 K to form BaO or La2O3, 1 wt% of Pt was incorporated to the supports by the impregnation method. Metal dispersion decreases as the Ba concentration increases, but it is not substantially affected by the La addition. The CO/FTIR and the competitive hydrogenation of benzene + toluene results indicate that an electron enrichment of the Pt particles occurs by effect of the additives. The increase of the electron density of Pt in Ba-catalysts is higher than for the La-catalysts. Moreover, the Ba addition highly enhances the aromatization and terminal hydrogenolysis activities, without substantial modification of the yields to the other reaction products. The yield to toluene is also increased by effect of 1 wt% of La, but it does not increases with the La concentration. The TEM-EDX studies indicate that the different distribution of the BaO and La2O3 in the zeolite may be the origin of the different surface and catalytic effects of these oxides in the Pt/KL catalysts.
Fil: Grau, Javier Mario. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica ; Argentina. Universidad Autónoma de Madrid; España
Fil: Gómez Sainero, L. M.. Universidad Autónoma de Madrid; España
Fil: Daza, L.. Universidad Autónoma de Madrid; España
Fil: Seoane, X.L.. Universidad Autónoma de Madrid; España
Fil: Arcoya, A.. Universidad Autónoma de Madrid; España
Materia
N-Heptane Dehydrocyclization
Pt/Kl Catalysts
Barium Oxide Promotor
Lanthanum Oxide Promotor
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:11336/37437
Acceder
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network_name_str CONICET Digital (CONICET)
spelling Effect of barium and lanthanum oxides on the properties of Pt/KL catalysts in the n-heptane dehydrocyclizationGrau, Javier MarioGómez Sainero, L. M.Daza, L.Seoane, X.L.Arcoya, A.N-Heptane DehydrocyclizationPt/Kl CatalystsBarium Oxide PromotorLanthanum Oxide Promotorhttps://purl.org/becyt/ford/2.4https://purl.org/becyt/ford/2Six fractions of zeolite KL were impregned with 1, 3 and 5 wt% of Ba or La, respectively, with nitrate precursors aqueous solutions. After calcination at 873 K to form BaO or La2O3, 1 wt% of Pt was incorporated to the supports by the impregnation method. Metal dispersion decreases as the Ba concentration increases, but it is not substantially affected by the La addition. The CO/FTIR and the competitive hydrogenation of benzene + toluene results indicate that an electron enrichment of the Pt particles occurs by effect of the additives. The increase of the electron density of Pt in Ba-catalysts is higher than for the La-catalysts. Moreover, the Ba addition highly enhances the aromatization and terminal hydrogenolysis activities, without substantial modification of the yields to the other reaction products. The yield to toluene is also increased by effect of 1 wt% of La, but it does not increases with the La concentration. The TEM-EDX studies indicate that the different distribution of the BaO and La2O3 in the zeolite may be the origin of the different surface and catalytic effects of these oxides in the Pt/KL catalysts.Fil: Grau, Javier Mario. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica ; Argentina. Universidad Autónoma de Madrid; EspañaFil: Gómez Sainero, L. M.. Universidad Autónoma de Madrid; EspañaFil: Daza, L.. Universidad Autónoma de Madrid; EspañaFil: Seoane, X.L.. Universidad Autónoma de Madrid; EspañaFil: Arcoya, A.. Universidad Autónoma de Madrid; EspañaElsevier2000-07info: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/11336/37437Grau, Javier Mario; Gómez Sainero, L. M.; Daza, L.; Seoane, X.L.; Arcoya, A.; Effect of barium and lanthanum oxides on the properties of Pt/KL catalysts in the n-heptane dehydrocyclization; Elsevier; Studies In Surface Science And Catalysis; 130; 7-2000; 2525-25300167-2991CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1016/S0167-2991(00)80849-6info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0167299100808496info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-22T12:05:02Zoai:ri.conicet.gov.ar:11336/37437instacron: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 12:05:02.575CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Effect of barium and lanthanum oxides on the properties of Pt/KL catalysts in the n-heptane dehydrocyclization
title Effect of barium and lanthanum oxides on the properties of Pt/KL catalysts in the n-heptane dehydrocyclization
spellingShingle Effect of barium and lanthanum oxides on the properties of Pt/KL catalysts in the n-heptane dehydrocyclization
Grau, Javier Mario
N-Heptane Dehydrocyclization
Pt/Kl Catalysts
Barium Oxide Promotor
Lanthanum Oxide Promotor
title_short Effect of barium and lanthanum oxides on the properties of Pt/KL catalysts in the n-heptane dehydrocyclization
title_full Effect of barium and lanthanum oxides on the properties of Pt/KL catalysts in the n-heptane dehydrocyclization
title_fullStr Effect of barium and lanthanum oxides on the properties of Pt/KL catalysts in the n-heptane dehydrocyclization
title_full_unstemmed Effect of barium and lanthanum oxides on the properties of Pt/KL catalysts in the n-heptane dehydrocyclization
title_sort Effect of barium and lanthanum oxides on the properties of Pt/KL catalysts in the n-heptane dehydrocyclization
dc.creator.none.fl_str_mv Grau, Javier Mario
Gómez Sainero, L. M.
Daza, L.
Seoane, X.L.
Arcoya, A.
author Grau, Javier Mario
author_facet Grau, Javier Mario
Gómez Sainero, L. M.
Daza, L.
Seoane, X.L.
Arcoya, A.
author_role author
author2 Gómez Sainero, L. M.
Daza, L.
Seoane, X.L.
Arcoya, A.
author2_role author
author
author
author
dc.subject.none.fl_str_mv N-Heptane Dehydrocyclization
Pt/Kl Catalysts
Barium Oxide Promotor
Lanthanum Oxide Promotor
topic N-Heptane Dehydrocyclization
Pt/Kl Catalysts
Barium Oxide Promotor
Lanthanum Oxide Promotor
purl_subject.fl_str_mv https://purl.org/becyt/ford/2.4
https://purl.org/becyt/ford/2
dc.description.none.fl_txt_mv Six fractions of zeolite KL were impregned with 1, 3 and 5 wt% of Ba or La, respectively, with nitrate precursors aqueous solutions. After calcination at 873 K to form BaO or La2O3, 1 wt% of Pt was incorporated to the supports by the impregnation method. Metal dispersion decreases as the Ba concentration increases, but it is not substantially affected by the La addition. The CO/FTIR and the competitive hydrogenation of benzene + toluene results indicate that an electron enrichment of the Pt particles occurs by effect of the additives. The increase of the electron density of Pt in Ba-catalysts is higher than for the La-catalysts. Moreover, the Ba addition highly enhances the aromatization and terminal hydrogenolysis activities, without substantial modification of the yields to the other reaction products. The yield to toluene is also increased by effect of 1 wt% of La, but it does not increases with the La concentration. The TEM-EDX studies indicate that the different distribution of the BaO and La2O3 in the zeolite may be the origin of the different surface and catalytic effects of these oxides in the Pt/KL catalysts.
Fil: Grau, Javier Mario. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica ; Argentina. Universidad Autónoma de Madrid; España
Fil: Gómez Sainero, L. M.. Universidad Autónoma de Madrid; España
Fil: Daza, L.. Universidad Autónoma de Madrid; España
Fil: Seoane, X.L.. Universidad Autónoma de Madrid; España
Fil: Arcoya, A.. Universidad Autónoma de Madrid; España
description Six fractions of zeolite KL were impregned with 1, 3 and 5 wt% of Ba or La, respectively, with nitrate precursors aqueous solutions. After calcination at 873 K to form BaO or La2O3, 1 wt% of Pt was incorporated to the supports by the impregnation method. Metal dispersion decreases as the Ba concentration increases, but it is not substantially affected by the La addition. The CO/FTIR and the competitive hydrogenation of benzene + toluene results indicate that an electron enrichment of the Pt particles occurs by effect of the additives. The increase of the electron density of Pt in Ba-catalysts is higher than for the La-catalysts. Moreover, the Ba addition highly enhances the aromatization and terminal hydrogenolysis activities, without substantial modification of the yields to the other reaction products. The yield to toluene is also increased by effect of 1 wt% of La, but it does not increases with the La concentration. The TEM-EDX studies indicate that the different distribution of the BaO and La2O3 in the zeolite may be the origin of the different surface and catalytic effects of these oxides in the Pt/KL catalysts.
publishDate 2000
dc.date.none.fl_str_mv 2000-07
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/11336/37437
Grau, Javier Mario; Gómez Sainero, L. M.; Daza, L.; Seoane, X.L.; Arcoya, A.; Effect of barium and lanthanum oxides on the properties of Pt/KL catalysts in the n-heptane dehydrocyclization; Elsevier; Studies In Surface Science And Catalysis; 130; 7-2000; 2525-2530
0167-2991
CONICET Digital
CONICET
url http://hdl.handle.net/11336/37437
identifier_str_mv Grau, Javier Mario; Gómez Sainero, L. M.; Daza, L.; Seoane, X.L.; Arcoya, A.; Effect of barium and lanthanum oxides on the properties of Pt/KL catalysts in the n-heptane dehydrocyclization; Elsevier; Studies In Surface Science And Catalysis; 130; 7-2000; 2525-2530
0167-2991
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/S0167-2991(00)80849-6
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0167299100808496
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
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
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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