Propriedades texturais e catalíticas de óxidos de ferro contendo cromo e cobre

Detalhes bibliográficos
Autor(a) principal: Souza,Marluce Oliveira da Guarda
Data de Publicação: 1998
Outros Autores: Quadro,Emerentino Brazil, Rangel,Maria do Carmo
Tipo de documento: Artigo
Idioma: por
Título da fonte: Química Nova (Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40421998000400010
Resumo: Chromium and copper-doped hematites were prepared with the aim of studying the synergistic effect of these dopants on the textural and on the catalytic properties of the iron oxides towards the high temperature shift reaction. It was found that the most active catalysts were those with the highest amount of copper. They had the Fe(II)/Fe(III) ratio near the stoichiometric value of magnetite, the highest surface areas under the reactional atmosphere and the greatest tendency to produce the active form; they also were poorly crystalline solids. The best performance was shown by the catalyst with Fe/Cu=10, heated at 300ºC. It can thus be concluded that copper acts both as textural and structural promoter in these catalysts.
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spelling Propriedades texturais e catalíticas de óxidos de ferro contendo cromo e cobreiron oxidescopper-doped catalystschromium-doped catalystsChromium and copper-doped hematites were prepared with the aim of studying the synergistic effect of these dopants on the textural and on the catalytic properties of the iron oxides towards the high temperature shift reaction. It was found that the most active catalysts were those with the highest amount of copper. They had the Fe(II)/Fe(III) ratio near the stoichiometric value of magnetite, the highest surface areas under the reactional atmosphere and the greatest tendency to produce the active form; they also were poorly crystalline solids. The best performance was shown by the catalyst with Fe/Cu=10, heated at 300ºC. It can thus be concluded that copper acts both as textural and structural promoter in these catalysts.Sociedade Brasileira de Química1998-07-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40421998000400010Química Nova v.21 n.4 1998reponame:Química Nova (Online)instname:Sociedade Brasileira de Química (SBQ)instacron:SBQ10.1590/S0100-40421998000400010info:eu-repo/semantics/openAccessSouza,Marluce Oliveira da GuardaQuadro,Emerentino BrazilRangel,Maria do Carmopor2002-11-05T00:00:00Zoai:scielo:S0100-40421998000400010Revistahttps://www.scielo.br/j/qn/ONGhttps://old.scielo.br/oai/scielo-oai.phpquimicanova@sbq.org.br1678-70640100-4042opendoar:2002-11-05T00:00Química Nova (Online) - Sociedade Brasileira de Química (SBQ)false
dc.title.none.fl_str_mv Propriedades texturais e catalíticas de óxidos de ferro contendo cromo e cobre
title Propriedades texturais e catalíticas de óxidos de ferro contendo cromo e cobre
spellingShingle Propriedades texturais e catalíticas de óxidos de ferro contendo cromo e cobre
Souza,Marluce Oliveira da Guarda
iron oxides
copper-doped catalysts
chromium-doped catalysts
title_short Propriedades texturais e catalíticas de óxidos de ferro contendo cromo e cobre
title_full Propriedades texturais e catalíticas de óxidos de ferro contendo cromo e cobre
title_fullStr Propriedades texturais e catalíticas de óxidos de ferro contendo cromo e cobre
title_full_unstemmed Propriedades texturais e catalíticas de óxidos de ferro contendo cromo e cobre
title_sort Propriedades texturais e catalíticas de óxidos de ferro contendo cromo e cobre
author Souza,Marluce Oliveira da Guarda
author_facet Souza,Marluce Oliveira da Guarda
Quadro,Emerentino Brazil
Rangel,Maria do Carmo
author_role author
author2 Quadro,Emerentino Brazil
Rangel,Maria do Carmo
author2_role author
author
dc.contributor.author.fl_str_mv Souza,Marluce Oliveira da Guarda
Quadro,Emerentino Brazil
Rangel,Maria do Carmo
dc.subject.por.fl_str_mv iron oxides
copper-doped catalysts
chromium-doped catalysts
topic iron oxides
copper-doped catalysts
chromium-doped catalysts
description Chromium and copper-doped hematites were prepared with the aim of studying the synergistic effect of these dopants on the textural and on the catalytic properties of the iron oxides towards the high temperature shift reaction. It was found that the most active catalysts were those with the highest amount of copper. They had the Fe(II)/Fe(III) ratio near the stoichiometric value of magnetite, the highest surface areas under the reactional atmosphere and the greatest tendency to produce the active form; they also were poorly crystalline solids. The best performance was shown by the catalyst with Fe/Cu=10, heated at 300ºC. It can thus be concluded that copper acts both as textural and structural promoter in these catalysts.
publishDate 1998
dc.date.none.fl_str_mv 1998-07-01
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=S0100-40421998000400010
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40421998000400010
dc.language.iso.fl_str_mv por
language por
dc.relation.none.fl_str_mv 10.1590/S0100-40421998000400010
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.21 n.4 1998
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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