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
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/37437
Ver los metadatos del registro completo
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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 Técnicas2025-09-29T10:32:37Zoai: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:34982025-09-29 10:32:37.242CONICET 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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1844614340118839296 |
score |
13.070432 |