Increased sulfur tolerance of Pt/KL catalysts prepared by vapor-phase impregnation and containing a Tm promoter

Autores
Jacobs, Gary; Ghadiali, Firoz; Pisanu, Adriana; Padro, Cristina; Borgna, Armando; Alvarez, Walter E.; Resasco, Daniel E.
Año de publicación
2000
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Pt/KL catalysts are highly active and selective for the aromatization of hexane, but they display a very high sensitivity to even small concentrations of sulfur in the feed. Tm-containing Pt/KL catalysts were prepared by incipient wetness impregnation (IWI), ion exchange (IE), and vapor-phase impregnation (VPI) methods. The platinum morphology resulting from the addition of thulium and platinum sequentially, using the VPI method, yielded the greatest enhancement to the aromatization performance of the Pt/KL catalysts. The presence of thulium in the sequential VPI Pt/Tm/KL catalyst resulted in a catalyst with higher platinum dispersion than that in an unpromoted VPI catalyst. VPI catalysts provided more finely dispersed Pt clusters than either than either conventional IWI or IE methods. From temperature programmed oxidation of poisoned catalysts, thulium acted as a getter for sulfur, thus, delaying the poisoning of platinum under sulfur-containing feeds. The initial activity of the Tm-promoted VPI catalysts was higher than that of the unpromoted Pt/KL VPI catalysts, suggesting that thulium may directly modify platinum or even participate in accelerating the aromatization reaction.
Fil: Jacobs, Gary. Oklahoma State University; Estados Unidos
Fil: Ghadiali, Firoz. Oklahoma State University; Estados Unidos
Fil: Pisanu, Adriana. Oklahoma State University; Estados Unidos
Fil: Padro, Cristina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica ; Argentina
Fil: Borgna, Armando. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica ; Argentina
Fil: Alvarez, Walter E.. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones en Ciencia y Tecnología de Materiales. Universidad Nacional de Mar del Plata. Facultad de Ingeniería. Instituto de Investigaciones en Ciencia y Tecnología de Materiales; Argentina
Fil: Resasco, Daniel E.. Oklahoma State University; Estados Unidos
Materia
Aromatization
Chemical Vapor Deposition
Drifts
Exafs
Lanthanide Promoters
N-Hexane
Pt/Kl
Vapor-Phase Impregnation
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:11336/37069
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/37069
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Increased sulfur tolerance of Pt/KL catalysts prepared by vapor-phase impregnation and containing a Tm promoterJacobs, GaryGhadiali, FirozPisanu, AdrianaPadro, CristinaBorgna, ArmandoAlvarez, Walter E.Resasco, Daniel E.AromatizationChemical Vapor DepositionDriftsExafsLanthanide PromotersN-HexanePt/KlVapor-Phase Impregnationhttps://purl.org/becyt/ford/2.4https://purl.org/becyt/ford/2Pt/KL catalysts are highly active and selective for the aromatization of hexane, but they display a very high sensitivity to even small concentrations of sulfur in the feed. Tm-containing Pt/KL catalysts were prepared by incipient wetness impregnation (IWI), ion exchange (IE), and vapor-phase impregnation (VPI) methods. The platinum morphology resulting from the addition of thulium and platinum sequentially, using the VPI method, yielded the greatest enhancement to the aromatization performance of the Pt/KL catalysts. The presence of thulium in the sequential VPI Pt/Tm/KL catalyst resulted in a catalyst with higher platinum dispersion than that in an unpromoted VPI catalyst. VPI catalysts provided more finely dispersed Pt clusters than either than either conventional IWI or IE methods. From temperature programmed oxidation of poisoned catalysts, thulium acted as a getter for sulfur, thus, delaying the poisoning of platinum under sulfur-containing feeds. The initial activity of the Tm-promoted VPI catalysts was higher than that of the unpromoted Pt/KL VPI catalysts, suggesting that thulium may directly modify platinum or even participate in accelerating the aromatization reaction.Fil: Jacobs, Gary. Oklahoma State University; Estados UnidosFil: Ghadiali, Firoz. Oklahoma State University; Estados UnidosFil: Pisanu, Adriana. Oklahoma State University; Estados UnidosFil: Padro, Cristina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica ; ArgentinaFil: Borgna, Armando. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica ; ArgentinaFil: Alvarez, Walter E.. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones en Ciencia y Tecnología de Materiales. Universidad Nacional de Mar del Plata. Facultad de Ingeniería. Instituto de Investigaciones en Ciencia y Tecnología de Materiales; ArgentinaFil: Resasco, Daniel E.. Oklahoma State University; Estados UnidosElsevier2000-04info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/37069Jacobs, Gary; Ghadiali, Firoz; Pisanu, Adriana; Padro, Cristina; Borgna, Armando; et al.; Increased sulfur tolerance of Pt/KL catalysts prepared by vapor-phase impregnation and containing a Tm promoter; Elsevier; Journal of Catalysis; 191; 1; 4-2000; 116-1270021-9517CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1006/jcat.1999.2779info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0021951799927793info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:13:58Zoai:ri.conicet.gov.ar:11336/37069instacron: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 10:13:59.044CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Increased sulfur tolerance of Pt/KL catalysts prepared by vapor-phase impregnation and containing a Tm promoter
title Increased sulfur tolerance of Pt/KL catalysts prepared by vapor-phase impregnation and containing a Tm promoter
spellingShingle Increased sulfur tolerance of Pt/KL catalysts prepared by vapor-phase impregnation and containing a Tm promoter
Jacobs, Gary
Aromatization
Chemical Vapor Deposition
Drifts
Exafs
Lanthanide Promoters
N-Hexane
Pt/Kl
Vapor-Phase Impregnation
title_short Increased sulfur tolerance of Pt/KL catalysts prepared by vapor-phase impregnation and containing a Tm promoter
title_full Increased sulfur tolerance of Pt/KL catalysts prepared by vapor-phase impregnation and containing a Tm promoter
title_fullStr Increased sulfur tolerance of Pt/KL catalysts prepared by vapor-phase impregnation and containing a Tm promoter
title_full_unstemmed Increased sulfur tolerance of Pt/KL catalysts prepared by vapor-phase impregnation and containing a Tm promoter
title_sort Increased sulfur tolerance of Pt/KL catalysts prepared by vapor-phase impregnation and containing a Tm promoter
dc.creator.none.fl_str_mv Jacobs, Gary
Ghadiali, Firoz
Pisanu, Adriana
Padro, Cristina
Borgna, Armando
Alvarez, Walter E.
Resasco, Daniel E.
author Jacobs, Gary
author_facet Jacobs, Gary
Ghadiali, Firoz
Pisanu, Adriana
Padro, Cristina
Borgna, Armando
Alvarez, Walter E.
Resasco, Daniel E.
author_role author
author2 Ghadiali, Firoz
Pisanu, Adriana
Padro, Cristina
Borgna, Armando
Alvarez, Walter E.
Resasco, Daniel E.
author2_role author
author
author
author
author
author
dc.subject.none.fl_str_mv Aromatization
Chemical Vapor Deposition
Drifts
Exafs
Lanthanide Promoters
N-Hexane
Pt/Kl
Vapor-Phase Impregnation
topic Aromatization
Chemical Vapor Deposition
Drifts
Exafs
Lanthanide Promoters
N-Hexane
Pt/Kl
Vapor-Phase Impregnation
purl_subject.fl_str_mv https://purl.org/becyt/ford/2.4
https://purl.org/becyt/ford/2
dc.description.none.fl_txt_mv Pt/KL catalysts are highly active and selective for the aromatization of hexane, but they display a very high sensitivity to even small concentrations of sulfur in the feed. Tm-containing Pt/KL catalysts were prepared by incipient wetness impregnation (IWI), ion exchange (IE), and vapor-phase impregnation (VPI) methods. The platinum morphology resulting from the addition of thulium and platinum sequentially, using the VPI method, yielded the greatest enhancement to the aromatization performance of the Pt/KL catalysts. The presence of thulium in the sequential VPI Pt/Tm/KL catalyst resulted in a catalyst with higher platinum dispersion than that in an unpromoted VPI catalyst. VPI catalysts provided more finely dispersed Pt clusters than either than either conventional IWI or IE methods. From temperature programmed oxidation of poisoned catalysts, thulium acted as a getter for sulfur, thus, delaying the poisoning of platinum under sulfur-containing feeds. The initial activity of the Tm-promoted VPI catalysts was higher than that of the unpromoted Pt/KL VPI catalysts, suggesting that thulium may directly modify platinum or even participate in accelerating the aromatization reaction.
Fil: Jacobs, Gary. Oklahoma State University; Estados Unidos
Fil: Ghadiali, Firoz. Oklahoma State University; Estados Unidos
Fil: Pisanu, Adriana. Oklahoma State University; Estados Unidos
Fil: Padro, Cristina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica ; Argentina
Fil: Borgna, Armando. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica ; Argentina
Fil: Alvarez, Walter E.. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones en Ciencia y Tecnología de Materiales. Universidad Nacional de Mar del Plata. Facultad de Ingeniería. Instituto de Investigaciones en Ciencia y Tecnología de Materiales; Argentina
Fil: Resasco, Daniel E.. Oklahoma State University; Estados Unidos
description Pt/KL catalysts are highly active and selective for the aromatization of hexane, but they display a very high sensitivity to even small concentrations of sulfur in the feed. Tm-containing Pt/KL catalysts were prepared by incipient wetness impregnation (IWI), ion exchange (IE), and vapor-phase impregnation (VPI) methods. The platinum morphology resulting from the addition of thulium and platinum sequentially, using the VPI method, yielded the greatest enhancement to the aromatization performance of the Pt/KL catalysts. The presence of thulium in the sequential VPI Pt/Tm/KL catalyst resulted in a catalyst with higher platinum dispersion than that in an unpromoted VPI catalyst. VPI catalysts provided more finely dispersed Pt clusters than either than either conventional IWI or IE methods. From temperature programmed oxidation of poisoned catalysts, thulium acted as a getter for sulfur, thus, delaying the poisoning of platinum under sulfur-containing feeds. The initial activity of the Tm-promoted VPI catalysts was higher than that of the unpromoted Pt/KL VPI catalysts, suggesting that thulium may directly modify platinum or even participate in accelerating the aromatization reaction.
publishDate 2000
dc.date.none.fl_str_mv 2000-04
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/11336/37069
Jacobs, Gary; Ghadiali, Firoz; Pisanu, Adriana; Padro, Cristina; Borgna, Armando; et al.; Increased sulfur tolerance of Pt/KL catalysts prepared by vapor-phase impregnation and containing a Tm promoter; Elsevier; Journal of Catalysis; 191; 1; 4-2000; 116-127
0021-9517
CONICET Digital
CONICET
url http://hdl.handle.net/11336/37069
identifier_str_mv Jacobs, Gary; Ghadiali, Firoz; Pisanu, Adriana; Padro, Cristina; Borgna, Armando; et al.; Increased sulfur tolerance of Pt/KL catalysts prepared by vapor-phase impregnation and containing a Tm promoter; Elsevier; Journal of Catalysis; 191; 1; 4-2000; 116-127
0021-9517
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1006/jcat.1999.2779
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0021951799927793
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
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 13.070432

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