Characterization and catalytic behavior of MoO3/V2O5/Nb2 O5 systems in isopropanol decomposition

Detalhes bibliográficos
Autor(a) principal: Paiva Jr,J. B. de
Data de Publicação: 2006
Outros Autores: Monteiro,W. R., Zacharias,M. A., Rodrigues,J. A. J., Cortez,G. G.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Brazilian Journal of Chemical Engineering
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0104-66322006000400009
Resumo: The influence of molybdenum oxide as a promoter on the V2O5/Nb2O5 system was investigated. A series of MoO3/V2O5/Nb2 O5 catalysts, with MoO3 loading ranging from 1 to 3 wt% MoO3 and fixed V2O5 content (21 wt%), were prepared by impregnation of the Nb2O5 support with an aqueous solution of ammonium metavanadate and ammonium molybdate. The acid-base properties of the catalysts were investigated to determine of the selectivity of the isopropanol decomposition reaction. The X-ray diffraction results showed the presence of the beta-(Nb,V)2O5 phase. The temperature-programmed reduction profiles showed that the reducibility of vanadium was affected by the presence of molybdenum oxide. Activity results for isopropanol decomposition revealed that the acid-base properties of V2O5/Nb2O5 catalysts are affected upon incorporation of MoO3, specifically for loadings of 3 wt %. For this catalyst composition both propylene and acetone formation rates decreased.
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spelling Characterization and catalytic behavior of MoO3/V2O5/Nb2 O5 systems in isopropanol decompositionNiobium oxideVanadium oxideMolybdenum oxideIsopropanol conversionThe influence of molybdenum oxide as a promoter on the V2O5/Nb2O5 system was investigated. A series of MoO3/V2O5/Nb2 O5 catalysts, with MoO3 loading ranging from 1 to 3 wt% MoO3 and fixed V2O5 content (21 wt%), were prepared by impregnation of the Nb2O5 support with an aqueous solution of ammonium metavanadate and ammonium molybdate. The acid-base properties of the catalysts were investigated to determine of the selectivity of the isopropanol decomposition reaction. The X-ray diffraction results showed the presence of the beta-(Nb,V)2O5 phase. The temperature-programmed reduction profiles showed that the reducibility of vanadium was affected by the presence of molybdenum oxide. Activity results for isopropanol decomposition revealed that the acid-base properties of V2O5/Nb2O5 catalysts are affected upon incorporation of MoO3, specifically for loadings of 3 wt %. For this catalyst composition both propylene and acetone formation rates decreased.Brazilian Society of Chemical Engineering2006-12-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0104-66322006000400009Brazilian Journal of Chemical Engineering v.23 n.4 2006reponame:Brazilian Journal of Chemical Engineeringinstname:Associação Brasileira de Engenharia Química (ABEQ)instacron:ABEQ10.1590/S0104-66322006000400009info:eu-repo/semantics/openAccessPaiva Jr,J. B. deMonteiro,W. R.Zacharias,M. A.Rodrigues,J. A. J.Cortez,G. G.eng2007-04-25T00:00:00Zoai:scielo:S0104-66322006000400009Revistahttps://www.scielo.br/j/bjce/https://old.scielo.br/oai/scielo-oai.phprgiudici@usp.br||rgiudici@usp.br1678-43830104-6632opendoar:2007-04-25T00:00Brazilian Journal of Chemical Engineering - Associação Brasileira de Engenharia Química (ABEQ)false
dc.title.none.fl_str_mv Characterization and catalytic behavior of MoO3/V2O5/Nb2 O5 systems in isopropanol decomposition
title Characterization and catalytic behavior of MoO3/V2O5/Nb2 O5 systems in isopropanol decomposition
spellingShingle Characterization and catalytic behavior of MoO3/V2O5/Nb2 O5 systems in isopropanol decomposition
Paiva Jr,J. B. de
Niobium oxide
Vanadium oxide
Molybdenum oxide
Isopropanol conversion
title_short Characterization and catalytic behavior of MoO3/V2O5/Nb2 O5 systems in isopropanol decomposition
title_full Characterization and catalytic behavior of MoO3/V2O5/Nb2 O5 systems in isopropanol decomposition
title_fullStr Characterization and catalytic behavior of MoO3/V2O5/Nb2 O5 systems in isopropanol decomposition
title_full_unstemmed Characterization and catalytic behavior of MoO3/V2O5/Nb2 O5 systems in isopropanol decomposition
title_sort Characterization and catalytic behavior of MoO3/V2O5/Nb2 O5 systems in isopropanol decomposition
author Paiva Jr,J. B. de
author_facet Paiva Jr,J. B. de
Monteiro,W. R.
Zacharias,M. A.
Rodrigues,J. A. J.
Cortez,G. G.
author_role author
author2 Monteiro,W. R.
Zacharias,M. A.
Rodrigues,J. A. J.
Cortez,G. G.
author2_role author
author
author
author
dc.contributor.author.fl_str_mv Paiva Jr,J. B. de
Monteiro,W. R.
Zacharias,M. A.
Rodrigues,J. A. J.
Cortez,G. G.
dc.subject.por.fl_str_mv Niobium oxide
Vanadium oxide
Molybdenum oxide
Isopropanol conversion
topic Niobium oxide
Vanadium oxide
Molybdenum oxide
Isopropanol conversion
description The influence of molybdenum oxide as a promoter on the V2O5/Nb2O5 system was investigated. A series of MoO3/V2O5/Nb2 O5 catalysts, with MoO3 loading ranging from 1 to 3 wt% MoO3 and fixed V2O5 content (21 wt%), were prepared by impregnation of the Nb2O5 support with an aqueous solution of ammonium metavanadate and ammonium molybdate. The acid-base properties of the catalysts were investigated to determine of the selectivity of the isopropanol decomposition reaction. The X-ray diffraction results showed the presence of the beta-(Nb,V)2O5 phase. The temperature-programmed reduction profiles showed that the reducibility of vanadium was affected by the presence of molybdenum oxide. Activity results for isopropanol decomposition revealed that the acid-base properties of V2O5/Nb2O5 catalysts are affected upon incorporation of MoO3, specifically for loadings of 3 wt %. For this catalyst composition both propylene and acetone formation rates decreased.
publishDate 2006
dc.date.none.fl_str_mv 2006-12-01
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=S0104-66322006000400009
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0104-66322006000400009
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S0104-66322006000400009
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 Brazilian Society of Chemical Engineering
publisher.none.fl_str_mv Brazilian Society of Chemical Engineering
dc.source.none.fl_str_mv Brazilian Journal of Chemical Engineering v.23 n.4 2006
reponame:Brazilian Journal of Chemical Engineering
instname:Associação Brasileira de Engenharia Química (ABEQ)
instacron:ABEQ
instname_str Associação Brasileira de Engenharia Química (ABEQ)
instacron_str ABEQ
institution ABEQ
reponame_str Brazilian Journal of Chemical Engineering
collection Brazilian Journal of Chemical Engineering
repository.name.fl_str_mv Brazilian Journal of Chemical Engineering - Associação Brasileira de Engenharia Química (ABEQ)
repository.mail.fl_str_mv rgiudici@usp.br||rgiudici@usp.br
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