Cinética de redução do catalisador CuO/ZnO/Al2O3

Detalhes bibliográficos
Autor(a) principal: Nele,Marcio
Data de Publicação: 2007
Outros Autores: Moreno,Esteban Lopez, Andrade,Heloysa Martins Carvalho
Tipo de documento: Artigo
Idioma: por
Título da fonte: Química Nova (Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422007000800005
Resumo: The reduction kinetics of a CuO/ZnO/Al2O3 catalyst by hydrogen was investigated isothermally and by temperature programmed reduction (TPR). Two reducible Cu2+ species were detected; the first one was identified as CuO bulk and the other as Cu2+ strongly interacting with alumina, possibly in the form of copper aluminate. The activation energies for the reduction of these two species were 60 and 90 kJ mol-1, respectively, and the reaction order with respect to hydrogen was one. The isothermal reduction data showed that the isotropic growth model is the most appropriate to describe the reaction rate data for both Cu2+ species.
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spelling Cinética de redução do catalisador CuO/ZnO/Al2O3kinetics of reductionthermoprogrammed reductionactivation energyThe reduction kinetics of a CuO/ZnO/Al2O3 catalyst by hydrogen was investigated isothermally and by temperature programmed reduction (TPR). Two reducible Cu2+ species were detected; the first one was identified as CuO bulk and the other as Cu2+ strongly interacting with alumina, possibly in the form of copper aluminate. The activation energies for the reduction of these two species were 60 and 90 kJ mol-1, respectively, and the reaction order with respect to hydrogen was one. The isothermal reduction data showed that the isotropic growth model is the most appropriate to describe the reaction rate data for both Cu2+ species.Sociedade Brasileira de Química2007-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422007000800005Química Nova v.30 n.8 2007reponame:Química Nova (Online)instname:Sociedade Brasileira de Química (SBQ)instacron:SBQ10.1590/S0100-40422007000800005info:eu-repo/semantics/openAccessNele,MarcioMoreno,Esteban LopezAndrade,Heloysa Martins Carvalhopor2008-01-21T00:00:00Zoai:scielo:S0100-40422007000800005Revistahttps://www.scielo.br/j/qn/ONGhttps://old.scielo.br/oai/scielo-oai.phpquimicanova@sbq.org.br1678-70640100-4042opendoar:2008-01-21T00:00Química Nova (Online) - Sociedade Brasileira de Química (SBQ)false
dc.title.none.fl_str_mv Cinética de redução do catalisador CuO/ZnO/Al2O3
title Cinética de redução do catalisador CuO/ZnO/Al2O3
spellingShingle Cinética de redução do catalisador CuO/ZnO/Al2O3
Nele,Marcio
kinetics of reduction
thermoprogrammed reduction
activation energy
title_short Cinética de redução do catalisador CuO/ZnO/Al2O3
title_full Cinética de redução do catalisador CuO/ZnO/Al2O3
title_fullStr Cinética de redução do catalisador CuO/ZnO/Al2O3
title_full_unstemmed Cinética de redução do catalisador CuO/ZnO/Al2O3
title_sort Cinética de redução do catalisador CuO/ZnO/Al2O3
author Nele,Marcio
author_facet Nele,Marcio
Moreno,Esteban Lopez
Andrade,Heloysa Martins Carvalho
author_role author
author2 Moreno,Esteban Lopez
Andrade,Heloysa Martins Carvalho
author2_role author
author
dc.contributor.author.fl_str_mv Nele,Marcio
Moreno,Esteban Lopez
Andrade,Heloysa Martins Carvalho
dc.subject.por.fl_str_mv kinetics of reduction
thermoprogrammed reduction
activation energy
topic kinetics of reduction
thermoprogrammed reduction
activation energy
description The reduction kinetics of a CuO/ZnO/Al2O3 catalyst by hydrogen was investigated isothermally and by temperature programmed reduction (TPR). Two reducible Cu2+ species were detected; the first one was identified as CuO bulk and the other as Cu2+ strongly interacting with alumina, possibly in the form of copper aluminate. The activation energies for the reduction of these two species were 60 and 90 kJ mol-1, respectively, and the reaction order with respect to hydrogen was one. The isothermal reduction data showed that the isotropic growth model is the most appropriate to describe the reaction rate data for both Cu2+ species.
publishDate 2007
dc.date.none.fl_str_mv 2007-01-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422007000800005
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422007000800005
dc.language.iso.fl_str_mv por
language por
dc.relation.none.fl_str_mv 10.1590/S0100-40422007000800005
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv Sociedade Brasileira de Química
publisher.none.fl_str_mv Sociedade Brasileira de Química
dc.source.none.fl_str_mv Química Nova v.30 n.8 2007
reponame:Química Nova (Online)
instname:Sociedade Brasileira de Química (SBQ)
instacron:SBQ
instname_str Sociedade Brasileira de Química (SBQ)
instacron_str SBQ
institution SBQ
reponame_str Química Nova (Online)
collection Química Nova (Online)
repository.name.fl_str_mv Química Nova (Online) - Sociedade Brasileira de Química (SBQ)
repository.mail.fl_str_mv quimicanova@sbq.org.br
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