Propriedades texturais e catalíticas de óxidos de ferro contendo cromo e cobre
Autor(a) principal: | |
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Data de Publicação: | 1998 |
Outros Autores: | , |
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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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 |
_version_ |
1750318100515913728 |