Transesterification of rapeseed oil with ethanol over heterogeneous heteropolyacids

Detalhes bibliográficos
Autor(a) principal: Hamad, B.
Data de Publicação: 2008
Outros Autores: Souza, R. O. Lopes de, Sapaly, G., Rocha, M. G. Carneiro, Oliveira, P. G. Pries de, Gonzalez, W. A., Sales, E. Andrade, Essayem, Nadine
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFBA
Texto Completo: http://www.repositorio.ufba.br/ri/handle/ri/6028
Resumo: Acesso restrito: Texto completo. p. 92-97
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spelling Hamad, B.Souza, R. O. Lopes deSapaly, G.Rocha, M. G. CarneiroOliveira, P. G. Pries deGonzalez, W. A.Sales, E. AndradeEssayem, NadineHamad, B.Souza, R. O. Lopes deSapaly, G.Rocha, M. G. CarneiroOliveira, P. G. Pries deGonzalez, W. A.Sales, E. AndradeEssayem, Nadine2012-05-31T17:07:12Z20081566-7367http://www.repositorio.ufba.br/ri/handle/ri/6028v. 10, n. 1Acesso restrito: Texto completo. p. 92-97Heterogeneized heteropolyacids, H3PW12O40/SiO2 and Cs2HPW12O40 were shown to catalyze rapeseed oil transesterification with ethanol in mild conditions. The number and the strength of the acid sites were evaluated by calorimetry. Over anhydrous H3PW12O40 and Cs2HPW12O40, acid sites of homogeneous strength with heat of ammonia adsorption near 200 kJ mol 1 were measured. By contrast, H3PW12O40/ SiO2 showed sites of lower strength with a heterogeneous distribution. The catalytic activity did not correlate the acid strength of solid catalysts. Indeed, equivalent TOF were determined on H3PW12O40 and silica supported H3PW12O40 while lower TOF were measured on microporous Cs2HPW12O40. The TOF values were interpreted in terms of leaching of the active phase in the case of H3PW12O40/SiO2 while reduced acid sites accessibility might explain the lower TOF measured on Cs2HPW12O40.Submitted by JURANDI DE SOUZA SILVA (jssufba@hotmail.com) on 2012-05-31T17:07:12Z No. of bitstreams: 1 __ac.els-cdn.com_S156673...a67d0eee08d900ee1917aec500cb9.pdf: 340171 bytes, checksum: b6ae3b92b4af9f10101074e61531a189 (MD5)Made available in DSpace on 2012-05-31T17:07:12Z (GMT). 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dc.title.pt_BR.fl_str_mv Transesterification of rapeseed oil with ethanol over heterogeneous heteropolyacids
dc.title.alternative.pt_BR.fl_str_mv Catalysis Communications
title Transesterification of rapeseed oil with ethanol over heterogeneous heteropolyacids
spellingShingle Transesterification of rapeseed oil with ethanol over heterogeneous heteropolyacids
Hamad, B.
Biodiesel
Transesterification
Rapeseed oil
Vegetable oil
Heteropolyacids
title_short Transesterification of rapeseed oil with ethanol over heterogeneous heteropolyacids
title_full Transesterification of rapeseed oil with ethanol over heterogeneous heteropolyacids
title_fullStr Transesterification of rapeseed oil with ethanol over heterogeneous heteropolyacids
title_full_unstemmed Transesterification of rapeseed oil with ethanol over heterogeneous heteropolyacids
title_sort Transesterification of rapeseed oil with ethanol over heterogeneous heteropolyacids
author Hamad, B.
author_facet Hamad, B.
Souza, R. O. Lopes de
Sapaly, G.
Rocha, M. G. Carneiro
Oliveira, P. G. Pries de
Gonzalez, W. A.
Sales, E. Andrade
Essayem, Nadine
author_role author
author2 Souza, R. O. Lopes de
Sapaly, G.
Rocha, M. G. Carneiro
Oliveira, P. G. Pries de
Gonzalez, W. A.
Sales, E. Andrade
Essayem, Nadine
author2_role author
author
author
author
author
author
author
dc.contributor.author.fl_str_mv Hamad, B.
Souza, R. O. Lopes de
Sapaly, G.
Rocha, M. G. Carneiro
Oliveira, P. G. Pries de
Gonzalez, W. A.
Sales, E. Andrade
Essayem, Nadine
Hamad, B.
Souza, R. O. Lopes de
Sapaly, G.
Rocha, M. G. Carneiro
Oliveira, P. G. Pries de
Gonzalez, W. A.
Sales, E. Andrade
Essayem, Nadine
dc.subject.por.fl_str_mv Biodiesel
Transesterification
Rapeseed oil
Vegetable oil
Heteropolyacids
topic Biodiesel
Transesterification
Rapeseed oil
Vegetable oil
Heteropolyacids
description Acesso restrito: Texto completo. p. 92-97
publishDate 2008
dc.date.issued.fl_str_mv 2008
dc.date.accessioned.fl_str_mv 2012-05-31T17:07:12Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://www.repositorio.ufba.br/ri/handle/ri/6028
dc.identifier.issn.none.fl_str_mv 1566-7367
dc.identifier.number.pt_BR.fl_str_mv v. 10, n. 1
identifier_str_mv 1566-7367
v. 10, n. 1
url http://www.repositorio.ufba.br/ri/handle/ri/6028
dc.language.iso.fl_str_mv eng
language eng
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.source.pt_BR.fl_str_mv http://dx.doi.org/10.1016/j.catcom.2008.07.040
dc.source.none.fl_str_mv reponame:Repositório Institucional da UFBA
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