Pt–Re–Ge/Al2O3 catalysts for n-octane reforming: Influence of the order of addition of the metal precursors

Detalhes bibliográficos
Autor(a) principal: Carvalho, Luciene Santos de
Data de Publicação: 2012
Outros Autores: Conceição, Karla C. S., Mazzieri, Vanina A., Reyes, Patricio, Pieck, Carlos L., Varela, Maria do Carmo Rangel Santos
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFBA
Texto Completo: http://repositorio.ufba.br/ri/handle/ri/15645
Resumo: Texto completo: acesso restrito. p. 156– 163
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spelling Carvalho, Luciene Santos deConceição, Karla C. S.Mazzieri, Vanina A.Reyes, PatricioPieck, Carlos L.Varela, Maria do Carmo Rangel SantosCarvalho, Luciene Santos deConceição, Karla C. S.Mazzieri, Vanina A.Reyes, PatricioPieck, Carlos L.Varela, Maria do Carmo Rangel Santos2014-08-19T11:33:01Z20120926-860Xhttp://repositorio.ufba.br/ri/handle/ri/15645v. 419Texto completo: acesso restrito. p. 156– 163Trimetallic Pt–Re–Ge supported catalysts for naphtha reforming were prepared by successive impregnation of suitable precursors on gamma alumina. The order of addition of these precursors was varied and its influence on the catalytic properties was assessed by means of the model reaction of n-octane reforming. It was found that the order of addition of the metal precursors greatly affects the performance and properties of these systems, which in turn is closely related to the first impregnated metal. When platinum is impregnated before rhenium and germanium the metals are reduced separately resulting in catalysts with high dehydrogenation activity and low hydrogenolysis activity. On the other hand, the impregnation of germanium before the other metals leads to the production of catalysts with low activities for dehydrogenation and high activity for hydrogenolysis, as a consequence of the strong interactions among the metals. By adding rhenium before the other metals, catalysts with intermediate behavior are produced. For all catalysts, platinum interacts more strongly with rhenium than with germanium. The order of addition does not modify the acidic properties of the support but germanium and rhenium seem to change the acidity of the support in the vicinity of the metals, causing differences in the selectivity to aromatic compounds and paraffinic isomers. These features can be used to tailor catalysts with high selectivity for the production of aromatics or isoparaffins, depending on the purpose of the reforming process. The RePtGe catalyst has the highest selectivity to branched isoparaffins and then can be used to produce isoparaffins-rich gasoline while a reformate rich in aromatics can be obtained by using the GeRePt catalyst.Submitted by Edileide Reis (leyde-landy@hotmail.com) on 2014-08-19T11:33:01Z No. of bitstreams: 1 Luciene S. Carvalho.pdf: 716926 bytes, checksum: a6ff42fb35bc7a8aeca859dbe9b4b5fd (MD5)Made available in DSpace on 2014-08-19T11:33:01Z (GMT). No. of bitstreams: 1 Luciene S. Carvalho.pdf: 716926 bytes, checksum: a6ff42fb35bc7a8aeca859dbe9b4b5fd (MD5) Previous issue date: 2012http://dx.doi.org/10.1016/j.apcata.2012.01.023reponame:Repositório Institucional da UFBAinstname:Universidade Federal da Bahia (UFBA)instacron:UFBAN-Octane reformingTrimetallic catalystsPt–Re–GeXylenesGasolinePt–Re–Ge/Al2O3 catalysts for n-octane reforming: Influence of the order of addition of the metal precursorsApplied Catalysis A: Generalinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article10000-01-01info:eu-repo/semantics/openAccessengORIGINALLuciene S. Carvalho.pdfLuciene S. Carvalho.pdfapplication/pdf716926https://repositorio.ufba.br/bitstream/ri/15645/1/Luciene%20S.%20Carvalho.pdfa6ff42fb35bc7a8aeca859dbe9b4b5fdMD51LICENSElicense.txtlicense.txttext/plain1345https://repositorio.ufba.br/bitstream/ri/15645/2/license.txtff6eaa8b858ea317fded99f125f5fcd0MD52TEXTLuciene S. Carvalho.pdf.txtLuciene S. 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dc.title.pt_BR.fl_str_mv Pt–Re–Ge/Al2O3 catalysts for n-octane reforming: Influence of the order of addition of the metal precursors
dc.title.alternative.pt_BR.fl_str_mv Applied Catalysis A: General
title Pt–Re–Ge/Al2O3 catalysts for n-octane reforming: Influence of the order of addition of the metal precursors
spellingShingle Pt–Re–Ge/Al2O3 catalysts for n-octane reforming: Influence of the order of addition of the metal precursors
Carvalho, Luciene Santos de
N-Octane reforming
Trimetallic catalysts
Pt–Re–Ge
Xylenes
Gasoline
title_short Pt–Re–Ge/Al2O3 catalysts for n-octane reforming: Influence of the order of addition of the metal precursors
title_full Pt–Re–Ge/Al2O3 catalysts for n-octane reforming: Influence of the order of addition of the metal precursors
title_fullStr Pt–Re–Ge/Al2O3 catalysts for n-octane reforming: Influence of the order of addition of the metal precursors
title_full_unstemmed Pt–Re–Ge/Al2O3 catalysts for n-octane reforming: Influence of the order of addition of the metal precursors
title_sort Pt–Re–Ge/Al2O3 catalysts for n-octane reforming: Influence of the order of addition of the metal precursors
author Carvalho, Luciene Santos de
author_facet Carvalho, Luciene Santos de
Conceição, Karla C. S.
Mazzieri, Vanina A.
Reyes, Patricio
Pieck, Carlos L.
Varela, Maria do Carmo Rangel Santos
author_role author
author2 Conceição, Karla C. S.
Mazzieri, Vanina A.
Reyes, Patricio
Pieck, Carlos L.
Varela, Maria do Carmo Rangel Santos
author2_role author
author
author
author
author
dc.contributor.author.fl_str_mv Carvalho, Luciene Santos de
Conceição, Karla C. S.
Mazzieri, Vanina A.
Reyes, Patricio
Pieck, Carlos L.
Varela, Maria do Carmo Rangel Santos
Carvalho, Luciene Santos de
Conceição, Karla C. S.
Mazzieri, Vanina A.
Reyes, Patricio
Pieck, Carlos L.
Varela, Maria do Carmo Rangel Santos
dc.subject.por.fl_str_mv N-Octane reforming
Trimetallic catalysts
Pt–Re–Ge
Xylenes
Gasoline
topic N-Octane reforming
Trimetallic catalysts
Pt–Re–Ge
Xylenes
Gasoline
description Texto completo: acesso restrito. p. 156– 163
publishDate 2012
dc.date.issued.fl_str_mv 2012
dc.date.accessioned.fl_str_mv 2014-08-19T11:33:01Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://repositorio.ufba.br/ri/handle/ri/15645
dc.identifier.issn.none.fl_str_mv 0926-860X
dc.identifier.number.pt_BR.fl_str_mv v. 419
identifier_str_mv 0926-860X
v. 419
url http://repositorio.ufba.br/ri/handle/ri/15645
dc.language.iso.fl_str_mv eng
language eng
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
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dc.source.pt_BR.fl_str_mv http://dx.doi.org/10.1016/j.apcata.2012.01.023
dc.source.none.fl_str_mv reponame:Repositório Institucional da UFBA
instname:Universidade Federal da Bahia (UFBA)
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reponame_str Repositório Institucional da UFBA
collection Repositório Institucional da UFBA
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