Estudo da oxidação parcial do etanol em catalisadores de Rh por DRIFTS

Detalhes bibliográficos
Autor(a) principal: Oliveira,Raquel Lima
Data de Publicação: 2013
Outros Autores: Passos,Fabio Barboza
Tipo de documento: Artigo
Idioma: por
Título da fonte: Química Nova (Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422013000300005
Resumo: The partial oxidation of ethanol on γ-Al2O3, CeO2, ZrO2 and Ce xZr1-xO2 supported rhodium catalysts was investigated by Diffuse Reflectance Infrared Fourier Transform Spectroscopy (DRIFTS). The catalysts were characterized by temperature-programmed reduction (TPR) and cyclohexane dehydrogenation. DRIFTS studies on the partial oxidation of ethanol showed that ethanol is adsorbed dissociatively, through O-H bond breaking, with the formation of ethoxy species, followed by successive dehydrogenation to acetaldehyde and acetyl species. Further oxidation to acetate and carbonate species lead to the formation of CO, CH4 and H2 by decomposition. The presence of CeO2 in the catalysts favored the oxidation steps due to its oxygen storage capacity.
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spelling Estudo da oxidação parcial do etanol em catalisadores de Rh por DRIFTShydrogenrhodiumethanolThe partial oxidation of ethanol on γ-Al2O3, CeO2, ZrO2 and Ce xZr1-xO2 supported rhodium catalysts was investigated by Diffuse Reflectance Infrared Fourier Transform Spectroscopy (DRIFTS). The catalysts were characterized by temperature-programmed reduction (TPR) and cyclohexane dehydrogenation. DRIFTS studies on the partial oxidation of ethanol showed that ethanol is adsorbed dissociatively, through O-H bond breaking, with the formation of ethoxy species, followed by successive dehydrogenation to acetaldehyde and acetyl species. Further oxidation to acetate and carbonate species lead to the formation of CO, CH4 and H2 by decomposition. The presence of CeO2 in the catalysts favored the oxidation steps due to its oxygen storage capacity.Sociedade Brasileira de Química2013-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422013000300005Química Nova v.36 n.3 2013reponame:Química Nova (Online)instname:Sociedade Brasileira de Química (SBQ)instacron:SBQ10.1590/S0100-40422013000300005info:eu-repo/semantics/openAccessOliveira,Raquel LimaPassos,Fabio Barbozapor2013-04-11T00:00:00Zoai:scielo:S0100-40422013000300005Revistahttps://www.scielo.br/j/qn/ONGhttps://old.scielo.br/oai/scielo-oai.phpquimicanova@sbq.org.br1678-70640100-4042opendoar:2013-04-11T00:00Química Nova (Online) - Sociedade Brasileira de Química (SBQ)false
dc.title.none.fl_str_mv Estudo da oxidação parcial do etanol em catalisadores de Rh por DRIFTS
title Estudo da oxidação parcial do etanol em catalisadores de Rh por DRIFTS
spellingShingle Estudo da oxidação parcial do etanol em catalisadores de Rh por DRIFTS
Oliveira,Raquel Lima
hydrogen
rhodium
ethanol
title_short Estudo da oxidação parcial do etanol em catalisadores de Rh por DRIFTS
title_full Estudo da oxidação parcial do etanol em catalisadores de Rh por DRIFTS
title_fullStr Estudo da oxidação parcial do etanol em catalisadores de Rh por DRIFTS
title_full_unstemmed Estudo da oxidação parcial do etanol em catalisadores de Rh por DRIFTS
title_sort Estudo da oxidação parcial do etanol em catalisadores de Rh por DRIFTS
author Oliveira,Raquel Lima
author_facet Oliveira,Raquel Lima
Passos,Fabio Barboza
author_role author
author2 Passos,Fabio Barboza
author2_role author
dc.contributor.author.fl_str_mv Oliveira,Raquel Lima
Passos,Fabio Barboza
dc.subject.por.fl_str_mv hydrogen
rhodium
ethanol
topic hydrogen
rhodium
ethanol
description The partial oxidation of ethanol on γ-Al2O3, CeO2, ZrO2 and Ce xZr1-xO2 supported rhodium catalysts was investigated by Diffuse Reflectance Infrared Fourier Transform Spectroscopy (DRIFTS). The catalysts were characterized by temperature-programmed reduction (TPR) and cyclohexane dehydrogenation. DRIFTS studies on the partial oxidation of ethanol showed that ethanol is adsorbed dissociatively, through O-H bond breaking, with the formation of ethoxy species, followed by successive dehydrogenation to acetaldehyde and acetyl species. Further oxidation to acetate and carbonate species lead to the formation of CO, CH4 and H2 by decomposition. The presence of CeO2 in the catalysts favored the oxidation steps due to its oxygen storage capacity.
publishDate 2013
dc.date.none.fl_str_mv 2013-01-01
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=S0100-40422013000300005
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422013000300005
dc.language.iso.fl_str_mv por
language por
dc.relation.none.fl_str_mv 10.1590/S0100-40422013000300005
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.36 n.3 2013
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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