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
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/57187
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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 Técnicas2025-09-29T09:51:02Zoai: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:34982025-09-29 09:51:02.666CONICET 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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1844613570577301504 |
score |
13.070432 |