Methane conversion to hydrogen and nanotubes on Pt/Ni catalysts supported over spinel MgAl2O4.

Detalhes bibliográficos
Autor(a) principal: Nuernberg, Giselle De Boit
Data de Publicação: 2011
Outros Autores: Fajardo, Humberto Vieira, Foletto, Edson Luiz, Probst, Sonia Maria Hickel, Carreño, Neftalí Lenin Villarreal, Probst, Luiz Fernando Dias, Barrault, Joel
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFOP
Texto Completo: http://www.repositorio.ufop.br/handle/123456789/4972
https://doi.org/10.1016/j.cattod.2010.10.053
Resumo: Methane decomposition is an endothermic process. Therefore a high temperature increases the methane conversion and improves the carbon accumulation. Nevertheless at high temperature conditions a faster deactivation of catalyst is generally observed. To keep the stability of the catalyst, lower reaction temperatures can be used as well as methane dilution but the catalytic activity is lowered. The aim of the present work consists in the study of the catalytic properties of Ni–Pt supported over MgAl2O4 for the selective conversion of methane into hydrogen and carbon nanotubes. The addition of a small amount of Pt to a nickel–MgAl2O4 catalyst promotes the formation of carbon nanotubes with a significant selectivity to MWCNT. The interest of using a bimetallic (Pt–Ni) catalyst is to favour the reduction of the Ni precursor (and the formation of small nickel particles). For the catalyst that we prepared methane is mainly transformed into structured MWCNTs if the reduction is complete while graphitization is observed over partially reduced catalysts. A fine characterization of the catalyst surface after each step of the preparation and use is currently under investigation in order to progress in the relationships between the surface composition and the CNTs formation.
id UFOP_a8335c653bac34da238c62e49be0c250
oai_identifier_str oai:repositorio.ufop.br:123456789/4972
network_acronym_str UFOP
network_name_str Repositório Institucional da UFOP
repository_id_str 3233
spelling Methane conversion to hydrogen and nanotubes on Pt/Ni catalysts supported over spinel MgAl2O4.Carbon nanotubesFree-hydrogenMethane conversionMethane decomposition is an endothermic process. Therefore a high temperature increases the methane conversion and improves the carbon accumulation. Nevertheless at high temperature conditions a faster deactivation of catalyst is generally observed. To keep the stability of the catalyst, lower reaction temperatures can be used as well as methane dilution but the catalytic activity is lowered. The aim of the present work consists in the study of the catalytic properties of Ni–Pt supported over MgAl2O4 for the selective conversion of methane into hydrogen and carbon nanotubes. The addition of a small amount of Pt to a nickel–MgAl2O4 catalyst promotes the formation of carbon nanotubes with a significant selectivity to MWCNT. The interest of using a bimetallic (Pt–Ni) catalyst is to favour the reduction of the Ni precursor (and the formation of small nickel particles). For the catalyst that we prepared methane is mainly transformed into structured MWCNTs if the reduction is complete while graphitization is observed over partially reduced catalysts. A fine characterization of the catalyst surface after each step of the preparation and use is currently under investigation in order to progress in the relationships between the surface composition and the CNTs formation.2015-04-09T10:58:16Z2015-04-09T10:58:16Z2011info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfNUEMBERG, G. D. B. el al. Methane conversion to hydrogen and nanotubes on Pt/Ni catalysts supported over spinel MgAl2O4. Catalysis Today, v. 176, p. 465-469, 2011. Disponível em: <http://www.sciencedirect.com/science/article/pii/S0920586110006875>. Acesso em: 02 fev. 2015.0920-5861http://www.repositorio.ufop.br/handle/123456789/4972https://doi.org/10.1016/j.cattod.2010.10.053O periódico Catalysis Today concede permissão para depósito deste artigo no Repositório Institucional da UFOP. Número da licença: 3580760390908.info:eu-repo/semantics/openAccessNuernberg, Giselle De BoitFajardo, Humberto VieiraFoletto, Edson LuizProbst, Sonia Maria HickelCarreño, Neftalí Lenin VillarrealProbst, Luiz Fernando DiasBarrault, Joelengreponame:Repositório Institucional da UFOPinstname:Universidade Federal de Ouro Preto (UFOP)instacron:UFOP2019-07-09T12:48:53Zoai:repositorio.ufop.br:123456789/4972Repositório InstitucionalPUBhttp://www.repositorio.ufop.br/oai/requestrepositorio@ufop.edu.bropendoar:32332019-07-09T12:48:53Repositório Institucional da UFOP - Universidade Federal de Ouro Preto (UFOP)false
dc.title.none.fl_str_mv Methane conversion to hydrogen and nanotubes on Pt/Ni catalysts supported over spinel MgAl2O4.
title Methane conversion to hydrogen and nanotubes on Pt/Ni catalysts supported over spinel MgAl2O4.
spellingShingle Methane conversion to hydrogen and nanotubes on Pt/Ni catalysts supported over spinel MgAl2O4.
Nuernberg, Giselle De Boit
Carbon nanotubes
Free-hydrogen
Methane conversion
title_short Methane conversion to hydrogen and nanotubes on Pt/Ni catalysts supported over spinel MgAl2O4.
title_full Methane conversion to hydrogen and nanotubes on Pt/Ni catalysts supported over spinel MgAl2O4.
title_fullStr Methane conversion to hydrogen and nanotubes on Pt/Ni catalysts supported over spinel MgAl2O4.
title_full_unstemmed Methane conversion to hydrogen and nanotubes on Pt/Ni catalysts supported over spinel MgAl2O4.
title_sort Methane conversion to hydrogen and nanotubes on Pt/Ni catalysts supported over spinel MgAl2O4.
author Nuernberg, Giselle De Boit
author_facet Nuernberg, Giselle De Boit
Fajardo, Humberto Vieira
Foletto, Edson Luiz
Probst, Sonia Maria Hickel
Carreño, Neftalí Lenin Villarreal
Probst, Luiz Fernando Dias
Barrault, Joel
author_role author
author2 Fajardo, Humberto Vieira
Foletto, Edson Luiz
Probst, Sonia Maria Hickel
Carreño, Neftalí Lenin Villarreal
Probst, Luiz Fernando Dias
Barrault, Joel
author2_role author
author
author
author
author
author
dc.contributor.author.fl_str_mv Nuernberg, Giselle De Boit
Fajardo, Humberto Vieira
Foletto, Edson Luiz
Probst, Sonia Maria Hickel
Carreño, Neftalí Lenin Villarreal
Probst, Luiz Fernando Dias
Barrault, Joel
dc.subject.por.fl_str_mv Carbon nanotubes
Free-hydrogen
Methane conversion
topic Carbon nanotubes
Free-hydrogen
Methane conversion
description Methane decomposition is an endothermic process. Therefore a high temperature increases the methane conversion and improves the carbon accumulation. Nevertheless at high temperature conditions a faster deactivation of catalyst is generally observed. To keep the stability of the catalyst, lower reaction temperatures can be used as well as methane dilution but the catalytic activity is lowered. The aim of the present work consists in the study of the catalytic properties of Ni–Pt supported over MgAl2O4 for the selective conversion of methane into hydrogen and carbon nanotubes. The addition of a small amount of Pt to a nickel–MgAl2O4 catalyst promotes the formation of carbon nanotubes with a significant selectivity to MWCNT. The interest of using a bimetallic (Pt–Ni) catalyst is to favour the reduction of the Ni precursor (and the formation of small nickel particles). For the catalyst that we prepared methane is mainly transformed into structured MWCNTs if the reduction is complete while graphitization is observed over partially reduced catalysts. A fine characterization of the catalyst surface after each step of the preparation and use is currently under investigation in order to progress in the relationships between the surface composition and the CNTs formation.
publishDate 2011
dc.date.none.fl_str_mv 2011
2015-04-09T10:58:16Z
2015-04-09T10:58:16Z
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 NUEMBERG, G. D. B. el al. Methane conversion to hydrogen and nanotubes on Pt/Ni catalysts supported over spinel MgAl2O4. Catalysis Today, v. 176, p. 465-469, 2011. Disponível em: <http://www.sciencedirect.com/science/article/pii/S0920586110006875>. Acesso em: 02 fev. 2015.
0920-5861
http://www.repositorio.ufop.br/handle/123456789/4972
https://doi.org/10.1016/j.cattod.2010.10.053
identifier_str_mv NUEMBERG, G. D. B. el al. Methane conversion to hydrogen and nanotubes on Pt/Ni catalysts supported over spinel MgAl2O4. Catalysis Today, v. 176, p. 465-469, 2011. Disponível em: <http://www.sciencedirect.com/science/article/pii/S0920586110006875>. Acesso em: 02 fev. 2015.
0920-5861
url http://www.repositorio.ufop.br/handle/123456789/4972
https://doi.org/10.1016/j.cattod.2010.10.053
dc.language.iso.fl_str_mv eng
language eng
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:Repositório Institucional da UFOP
instname:Universidade Federal de Ouro Preto (UFOP)
instacron:UFOP
instname_str Universidade Federal de Ouro Preto (UFOP)
instacron_str UFOP
institution UFOP
reponame_str Repositório Institucional da UFOP
collection Repositório Institucional da UFOP
repository.name.fl_str_mv Repositório Institucional da UFOP - Universidade Federal de Ouro Preto (UFOP)
repository.mail.fl_str_mv repositorio@ufop.edu.br
_version_ 1813002795665588224