Catalytic properties of Pt-Re/Al2O3 naphtha-reforming catalysts modified by germanium introduced by redox reaction at different pH values

Autores
D'ippolito, Silvana Andrea; Vera, Carlos Roman; Epron, Florence; Samoila, Petrisor; Especel, Catherine; Marécot, Patrice; Gutierrez, Laura Beatriz; Pieck, Carlos Luis
Año de publicación
2009
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Ge was deposited by catalytic reduction on Pt-Re/Al2O 3-Cl base catalysts prepared by coimpregnation. The nominal amounts of Ge incorporated from various impregnation media (H2O, HCl, or NH3) were 0.1, 0.3, 1.0, and 2.0 wt %. The catalysts were characterized by means of the test reactions of cyclohexane dehydrogenation and cyclopentane hydrogenolysis. The catalysts were further characterized by FTIR spectroscopy of adsorbed CO and adsorbed pyridine and by temperature-programmed desorption of pyridine. Blank treatments performed on the Pt-Re/Al 2O3 base catalyst in the different media (without Ge addition) showed that the catalytic reduction method modified the properties of the parent catalyst depending on the pH of the solution. The Brønsted acidity decreased as the impregnation pH was increased, whereas the Lewis acidity of the catalyst was not substantially modified by any of the impregnation media. Catalysts with higher Pt-Re interactions were obtained after treatment in a solution of high pH (NH3 medium). The interaction between Ge and the active metal phase increased with increasing Ge content. This interaction resulted in a decrease of the metal activity in cyclohexane dehydrogenation and cyclopentane hydrogenolysis. Catalyst performances were evaluated in n-heptane (n-C7) reforming under pressure. The n-C 7 tests showed that trimetallic catalysts obtained by impregnation of small quantities of Ge (≤0.3 wt %) using a neutral aqueous solution are the most active and toluene-selective, especially compared to those prepared using HCl or NH3 solution. Nevertheless, the use of ammonia in the impregnation medium allows one to decrease the amount of cracking products. Thus, the catalytic properties might be improved by using a slightly basic medium for the impregnation of Ge.
Fil: D'ippolito, Silvana Andrea. 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: Vera, Carlos Roman. 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: Epron, Florence. Université de Poitiers; Francia
Fil: Samoila, Petrisor. Université de Poitiers; Francia
Fil: Especel, Catherine. Université de Poitiers; Francia
Fil: Marécot, Patrice. Université de Poitiers; Francia
Fil: Gutierrez, Laura Beatriz. 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: Pieck, Carlos Luis. 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
Naphtha-Reforming Catalysts
Pt-Re/Al2o3
Pt-Re Interactions
In N-Heptane (N-C7) Reforming
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:11336/57187
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/57187
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Catalytic properties of Pt-Re/Al2O3 naphtha-reforming catalysts modified by germanium introduced by redox reaction at different pH valuesD'ippolito, Silvana AndreaVera, Carlos RomanEpron, FlorenceSamoila, PetrisorEspecel, CatherineMarécot, PatriceGutierrez, Laura BeatrizPieck, Carlos LuisNaphtha-Reforming CatalystsPt-Re/Al2o3Pt-Re InteractionsIn N-Heptane (N-C7) Reforminghttps://purl.org/becyt/ford/2.7https://purl.org/becyt/ford/2Ge was deposited by catalytic reduction on Pt-Re/Al2O 3-Cl base catalysts prepared by coimpregnation. The nominal amounts of Ge incorporated from various impregnation media (H2O, HCl, or NH3) were 0.1, 0.3, 1.0, and 2.0 wt %. The catalysts were characterized by means of the test reactions of cyclohexane dehydrogenation and cyclopentane hydrogenolysis. The catalysts were further characterized by FTIR spectroscopy of adsorbed CO and adsorbed pyridine and by temperature-programmed desorption of pyridine. Blank treatments performed on the Pt-Re/Al 2O3 base catalyst in the different media (without Ge addition) showed that the catalytic reduction method modified the properties of the parent catalyst depending on the pH of the solution. The Brønsted acidity decreased as the impregnation pH was increased, whereas the Lewis acidity of the catalyst was not substantially modified by any of the impregnation media. Catalysts with higher Pt-Re interactions were obtained after treatment in a solution of high pH (NH3 medium). The interaction between Ge and the active metal phase increased with increasing Ge content. This interaction resulted in a decrease of the metal activity in cyclohexane dehydrogenation and cyclopentane hydrogenolysis. Catalyst performances were evaluated in n-heptane (n-C7) reforming under pressure. The n-C 7 tests showed that trimetallic catalysts obtained by impregnation of small quantities of Ge (≤0.3 wt %) using a neutral aqueous solution are the most active and toluene-selective, especially compared to those prepared using HCl or NH3 solution. Nevertheless, the use of ammonia in the impregnation medium allows one to decrease the amount of cracking products. Thus, the catalytic properties might be improved by using a slightly basic medium for the impregnation of Ge.Fil: D'ippolito, Silvana Andrea. 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: Vera, Carlos Roman. 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: Epron, Florence. Université de Poitiers; FranciaFil: Samoila, Petrisor. Université de Poitiers; FranciaFil: Especel, Catherine. Université de Poitiers; FranciaFil: Marécot, Patrice. Université de Poitiers; FranciaFil: Gutierrez, Laura Beatriz. 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: Pieck, Carlos Luis. 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"; ArgentinaAmerican Chemical Society2009-04info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/57187D'ippolito, Silvana Andrea; Vera, Carlos Roman; Epron, Florence; Samoila, Petrisor; Especel, Catherine; et al.; Catalytic properties of Pt-Re/Al2O3 naphtha-reforming catalysts modified by germanium introduced by redox reaction at different pH values; American Chemical Society; Industrial & Engineering Chemical Research; 48; 8; 4-2009; 3771-37780888-5885CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1021/ie801158jinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-22T11:20:21Zoai:ri.conicet.gov.ar:11336/57187instacron: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 11:20:22.003CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Catalytic properties of Pt-Re/Al2O3 naphtha-reforming catalysts modified by germanium introduced by redox reaction at different pH values
title Catalytic properties of Pt-Re/Al2O3 naphtha-reforming catalysts modified by germanium introduced by redox reaction at different pH values
spellingShingle Catalytic properties of Pt-Re/Al2O3 naphtha-reforming catalysts modified by germanium introduced by redox reaction at different pH values
D'ippolito, Silvana Andrea
Naphtha-Reforming Catalysts
Pt-Re/Al2o3
Pt-Re Interactions
In N-Heptane (N-C7) Reforming
title_short Catalytic properties of Pt-Re/Al2O3 naphtha-reforming catalysts modified by germanium introduced by redox reaction at different pH values
title_full Catalytic properties of Pt-Re/Al2O3 naphtha-reforming catalysts modified by germanium introduced by redox reaction at different pH values
title_fullStr Catalytic properties of Pt-Re/Al2O3 naphtha-reforming catalysts modified by germanium introduced by redox reaction at different pH values
title_full_unstemmed Catalytic properties of Pt-Re/Al2O3 naphtha-reforming catalysts modified by germanium introduced by redox reaction at different pH values
title_sort Catalytic properties of Pt-Re/Al2O3 naphtha-reforming catalysts modified by germanium introduced by redox reaction at different pH values
dc.creator.none.fl_str_mv D'ippolito, Silvana Andrea
Vera, Carlos Roman
Epron, Florence
Samoila, Petrisor
Especel, Catherine
Marécot, Patrice
Gutierrez, Laura Beatriz
Pieck, Carlos Luis
author D'ippolito, Silvana Andrea
author_facet D'ippolito, Silvana Andrea
Vera, Carlos Roman
Epron, Florence
Samoila, Petrisor
Especel, Catherine
Marécot, Patrice
Gutierrez, Laura Beatriz
Pieck, Carlos Luis
author_role author
author2 Vera, Carlos Roman
Epron, Florence
Samoila, Petrisor
Especel, Catherine
Marécot, Patrice
Gutierrez, Laura Beatriz
Pieck, Carlos Luis
author2_role author
author
author
author
author
author
author
dc.subject.none.fl_str_mv Naphtha-Reforming Catalysts
Pt-Re/Al2o3
Pt-Re Interactions
In N-Heptane (N-C7) Reforming
topic Naphtha-Reforming Catalysts
Pt-Re/Al2o3
Pt-Re Interactions
In N-Heptane (N-C7) Reforming
purl_subject.fl_str_mv https://purl.org/becyt/ford/2.7
https://purl.org/becyt/ford/2
dc.description.none.fl_txt_mv Ge was deposited by catalytic reduction on Pt-Re/Al2O 3-Cl base catalysts prepared by coimpregnation. The nominal amounts of Ge incorporated from various impregnation media (H2O, HCl, or NH3) were 0.1, 0.3, 1.0, and 2.0 wt %. The catalysts were characterized by means of the test reactions of cyclohexane dehydrogenation and cyclopentane hydrogenolysis. The catalysts were further characterized by FTIR spectroscopy of adsorbed CO and adsorbed pyridine and by temperature-programmed desorption of pyridine. Blank treatments performed on the Pt-Re/Al 2O3 base catalyst in the different media (without Ge addition) showed that the catalytic reduction method modified the properties of the parent catalyst depending on the pH of the solution. The Brønsted acidity decreased as the impregnation pH was increased, whereas the Lewis acidity of the catalyst was not substantially modified by any of the impregnation media. Catalysts with higher Pt-Re interactions were obtained after treatment in a solution of high pH (NH3 medium). The interaction between Ge and the active metal phase increased with increasing Ge content. This interaction resulted in a decrease of the metal activity in cyclohexane dehydrogenation and cyclopentane hydrogenolysis. Catalyst performances were evaluated in n-heptane (n-C7) reforming under pressure. The n-C 7 tests showed that trimetallic catalysts obtained by impregnation of small quantities of Ge (≤0.3 wt %) using a neutral aqueous solution are the most active and toluene-selective, especially compared to those prepared using HCl or NH3 solution. Nevertheless, the use of ammonia in the impregnation medium allows one to decrease the amount of cracking products. Thus, the catalytic properties might be improved by using a slightly basic medium for the impregnation of Ge.
Fil: D'ippolito, Silvana Andrea. 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: Vera, Carlos Roman. 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: Epron, Florence. Université de Poitiers; Francia
Fil: Samoila, Petrisor. Université de Poitiers; Francia
Fil: Especel, Catherine. Université de Poitiers; Francia
Fil: Marécot, Patrice. Université de Poitiers; Francia
Fil: Gutierrez, Laura Beatriz. 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: Pieck, Carlos Luis. 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 Ge was deposited by catalytic reduction on Pt-Re/Al2O 3-Cl base catalysts prepared by coimpregnation. The nominal amounts of Ge incorporated from various impregnation media (H2O, HCl, or NH3) were 0.1, 0.3, 1.0, and 2.0 wt %. The catalysts were characterized by means of the test reactions of cyclohexane dehydrogenation and cyclopentane hydrogenolysis. The catalysts were further characterized by FTIR spectroscopy of adsorbed CO and adsorbed pyridine and by temperature-programmed desorption of pyridine. Blank treatments performed on the Pt-Re/Al 2O3 base catalyst in the different media (without Ge addition) showed that the catalytic reduction method modified the properties of the parent catalyst depending on the pH of the solution. The Brønsted acidity decreased as the impregnation pH was increased, whereas the Lewis acidity of the catalyst was not substantially modified by any of the impregnation media. Catalysts with higher Pt-Re interactions were obtained after treatment in a solution of high pH (NH3 medium). The interaction between Ge and the active metal phase increased with increasing Ge content. This interaction resulted in a decrease of the metal activity in cyclohexane dehydrogenation and cyclopentane hydrogenolysis. Catalyst performances were evaluated in n-heptane (n-C7) reforming under pressure. The n-C 7 tests showed that trimetallic catalysts obtained by impregnation of small quantities of Ge (≤0.3 wt %) using a neutral aqueous solution are the most active and toluene-selective, especially compared to those prepared using HCl or NH3 solution. Nevertheless, the use of ammonia in the impregnation medium allows one to decrease the amount of cracking products. Thus, the catalytic properties might be improved by using a slightly basic medium for the impregnation of Ge.
publishDate 2009
dc.date.none.fl_str_mv 2009-04
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/11336/57187
D'ippolito, Silvana Andrea; Vera, Carlos Roman; Epron, Florence; Samoila, Petrisor; Especel, Catherine; et al.; Catalytic properties of Pt-Re/Al2O3 naphtha-reforming catalysts modified by germanium introduced by redox reaction at different pH values; American Chemical Society; Industrial & Engineering Chemical Research; 48; 8; 4-2009; 3771-3778
0888-5885
CONICET Digital
CONICET
url http://hdl.handle.net/11336/57187
identifier_str_mv D'ippolito, Silvana Andrea; Vera, Carlos Roman; Epron, Florence; Samoila, Petrisor; Especel, Catherine; et al.; Catalytic properties of Pt-Re/Al2O3 naphtha-reforming catalysts modified by germanium introduced by redox reaction at different pH values; American Chemical Society; Industrial & Engineering Chemical Research; 48; 8; 4-2009; 3771-3778
0888-5885
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1021/ie801158j
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
application/pdf
application/pdf
application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv American Chemical Society
publisher.none.fl_str_mv American Chemical Society
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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