Ação promotora do zinco em catalisadores de síntese do estireno

Detalhes bibliográficos
Autor(a) principal: Leite,Hugo Ernane Bonfim
Data de Publicação: 2004
Outros Autores: Oliveira,Alcineia Conceição, 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=S0100-40422004000200014
Resumo: Ethylbenzene dehydrogenation in the presence of steam is the main commercial route to produce styrene. The industrial catalyst is chromium and potassium-doped hematite, which easily deactivates with time due to potassium loss. In order to find non-toxic and potassium free catalysts, the promoter action of zinc on hematite was studied in this work. It was found that zinc acts as structural promoter by stabilizing the Fe3+ species (active phase) as maghemite. Although it decreases the specific surface area, it increases four times the catalytic activity as compared to hematite.
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spelling Ação promotora do zinco em catalisadores de síntese do estirenohematitestyreneethylbenzene dehydrogenationEthylbenzene dehydrogenation in the presence of steam is the main commercial route to produce styrene. The industrial catalyst is chromium and potassium-doped hematite, which easily deactivates with time due to potassium loss. In order to find non-toxic and potassium free catalysts, the promoter action of zinc on hematite was studied in this work. It was found that zinc acts as structural promoter by stabilizing the Fe3+ species (active phase) as maghemite. Although it decreases the specific surface area, it increases four times the catalytic activity as compared to hematite.Sociedade Brasileira de Química2004-04-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422004000200014Química Nova v.27 n.2 2004reponame:Química Nova (Online)instname:Sociedade Brasileira de Química (SBQ)instacron:SBQ10.1590/S0100-40422004000200014info:eu-repo/semantics/openAccessLeite,Hugo Ernane BonfimOliveira,Alcineia ConceiçãoRangel,Maria do Carmopor2004-05-31T00:00:00Zoai:scielo:S0100-40422004000200014Revistahttps://www.scielo.br/j/qn/ONGhttps://old.scielo.br/oai/scielo-oai.phpquimicanova@sbq.org.br1678-70640100-4042opendoar:2004-05-31T00:00Química Nova (Online) - Sociedade Brasileira de Química (SBQ)false
dc.title.none.fl_str_mv Ação promotora do zinco em catalisadores de síntese do estireno
title Ação promotora do zinco em catalisadores de síntese do estireno
spellingShingle Ação promotora do zinco em catalisadores de síntese do estireno
Leite,Hugo Ernane Bonfim
hematite
styrene
ethylbenzene dehydrogenation
title_short Ação promotora do zinco em catalisadores de síntese do estireno
title_full Ação promotora do zinco em catalisadores de síntese do estireno
title_fullStr Ação promotora do zinco em catalisadores de síntese do estireno
title_full_unstemmed Ação promotora do zinco em catalisadores de síntese do estireno
title_sort Ação promotora do zinco em catalisadores de síntese do estireno
author Leite,Hugo Ernane Bonfim
author_facet Leite,Hugo Ernane Bonfim
Oliveira,Alcineia Conceição
Rangel,Maria do Carmo
author_role author
author2 Oliveira,Alcineia Conceição
Rangel,Maria do Carmo
author2_role author
author
dc.contributor.author.fl_str_mv Leite,Hugo Ernane Bonfim
Oliveira,Alcineia Conceição
Rangel,Maria do Carmo
dc.subject.por.fl_str_mv hematite
styrene
ethylbenzene dehydrogenation
topic hematite
styrene
ethylbenzene dehydrogenation
description Ethylbenzene dehydrogenation in the presence of steam is the main commercial route to produce styrene. The industrial catalyst is chromium and potassium-doped hematite, which easily deactivates with time due to potassium loss. In order to find non-toxic and potassium free catalysts, the promoter action of zinc on hematite was studied in this work. It was found that zinc acts as structural promoter by stabilizing the Fe3+ species (active phase) as maghemite. Although it decreases the specific surface area, it increases four times the catalytic activity as compared to hematite.
publishDate 2004
dc.date.none.fl_str_mv 2004-04-01
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=S0100-40422004000200014
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422004000200014
dc.language.iso.fl_str_mv por
language por
dc.relation.none.fl_str_mv 10.1590/S0100-40422004000200014
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.27 n.2 2004
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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