The kinetics of carbon formation from CH4+H2 on a silica-supported nickel catalyst
Autor(a) principal: | |
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Data de Publicação: | 1992 |
Outros Autores: | |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/1822/5410 |
Resumo: | A microkinetic model for the formation of carbon on a nickel surface exposed to CH4 + H2 gas mixtures is constructed and compared with measured carbon formation rates for a Ni/SiO2 catalyst. Most of the parameters of the model are determined independently from single-crystal experiments or from ab initio calculations. Two rate constants and two chemisorption bond energies are determined by least-squares minimization. Good agreement is obtained with the experimental values. The resulting values for the bond energies are in good agreement with values obtained by experiments and ab initio calculation. The bond energies as well as the ratio of the rate constants depend only weakly on the assumed carbon coverage. |
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The kinetics of carbon formation from CH4+H2 on a silica-supported nickel catalystScience & TechnologyA microkinetic model for the formation of carbon on a nickel surface exposed to CH4 + H2 gas mixtures is constructed and compared with measured carbon formation rates for a Ni/SiO2 catalyst. Most of the parameters of the model are determined independently from single-crystal experiments or from ab initio calculations. Two rate constants and two chemisorption bond energies are determined by least-squares minimization. Good agreement is obtained with the experimental values. The resulting values for the bond energies are in good agreement with values obtained by experiments and ab initio calculation. The bond energies as well as the ratio of the rate constants depend only weakly on the assumed carbon coverage.Center for Surface Reactivity; COMETT program.ElsevierUniversidade do MinhoAlstrup, I.Tavares, M. T.1992-051992-05-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/1822/5410eng"Journal of catalysis". ISSN 0021-9517. 135:1 (May 1992) 147-155.0021-951710.1016/0021-9517(92)90276-Ninfo:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-07-21T12:49:54Zoai:repositorium.sdum.uminho.pt:1822/5410Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T19:48:30.836161Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
The kinetics of carbon formation from CH4+H2 on a silica-supported nickel catalyst |
title |
The kinetics of carbon formation from CH4+H2 on a silica-supported nickel catalyst |
spellingShingle |
The kinetics of carbon formation from CH4+H2 on a silica-supported nickel catalyst Alstrup, I. Science & Technology |
title_short |
The kinetics of carbon formation from CH4+H2 on a silica-supported nickel catalyst |
title_full |
The kinetics of carbon formation from CH4+H2 on a silica-supported nickel catalyst |
title_fullStr |
The kinetics of carbon formation from CH4+H2 on a silica-supported nickel catalyst |
title_full_unstemmed |
The kinetics of carbon formation from CH4+H2 on a silica-supported nickel catalyst |
title_sort |
The kinetics of carbon formation from CH4+H2 on a silica-supported nickel catalyst |
author |
Alstrup, I. |
author_facet |
Alstrup, I. Tavares, M. T. |
author_role |
author |
author2 |
Tavares, M. T. |
author2_role |
author |
dc.contributor.none.fl_str_mv |
Universidade do Minho |
dc.contributor.author.fl_str_mv |
Alstrup, I. Tavares, M. T. |
dc.subject.por.fl_str_mv |
Science & Technology |
topic |
Science & Technology |
description |
A microkinetic model for the formation of carbon on a nickel surface exposed to CH4 + H2 gas mixtures is constructed and compared with measured carbon formation rates for a Ni/SiO2 catalyst. Most of the parameters of the model are determined independently from single-crystal experiments or from ab initio calculations. Two rate constants and two chemisorption bond energies are determined by least-squares minimization. Good agreement is obtained with the experimental values. The resulting values for the bond energies are in good agreement with values obtained by experiments and ab initio calculation. The bond energies as well as the ratio of the rate constants depend only weakly on the assumed carbon coverage. |
publishDate |
1992 |
dc.date.none.fl_str_mv |
1992-05 1992-05-01T00:00:00Z |
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://hdl.handle.net/1822/5410 |
url |
http://hdl.handle.net/1822/5410 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
"Journal of catalysis". ISSN 0021-9517. 135:1 (May 1992) 147-155. 0021-9517 10.1016/0021-9517(92)90276-N |
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.publisher.none.fl_str_mv |
Elsevier |
publisher.none.fl_str_mv |
Elsevier |
dc.source.none.fl_str_mv |
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instname_str |
Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
instacron_str |
RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
collection |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository.name.fl_str_mv |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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1799133062980698112 |