Performance of catalysts with Nb2O5 for hydrogen production from ethanol steam reforming

Detalhes bibliográficos
Autor(a) principal: Machado, Nádia Regina Camardo Fernandes
Data de Publicação: 2008
Outros Autores: Rizzo, Roberta Carolina Pelissari, Peguin, Robson Pablo Sobradiel
Tipo de documento: Artigo
Idioma: por
Título da fonte: Acta scientiarum. Technology (Online)
Texto Completo: http://www.periodicos.uem.br/ojs/index.php/ActaSciTechnol/article/view/2484
Resumo: Cu/Nb2O5 and Cu/Nb2O5/Al2O3 were studied as catalysts in ethanol steam-reforming for hydrogen production. They were prepared through impregnation, with different copper and Nb2O5 concentrations. Cu/ZnO/Al2O3 (G66), a commercial catalyst for methanol reforming was used for comparison. Temperature-programmed reduction data showed incomplete reduction of the copper, resulting in two reduction peaks, in opposition to CuO bulk, whose reduction occurred in one step (only one peak), it evidences a copper modification through Nb2O5. Results of diffuse reflectance spectra also evidenced the interaction. The catalytic tests showed that the niobium oxide dispersion on alumina improved the catalyst action; the ternary catalysts are the ones that show higher hydrogen production. They also produce ethyl ether as side product. The binary catalysts don't present parallel reaction, probably because when Cu/Nb2O5 is dispersed on alumina there is another type of catalytic site production, which produces ethyl ether.
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spelling Performance of catalysts with Nb2O5 for hydrogen production from ethanol steam reformingDesempenho de catalisadores com Nb2O5 para produção de hidrogênio a partir da reforma de etanol com vapor d’águareforma de etanol com vapor d’águaprodução de hidrogêniocatalisadores Cu/Nb2O53.06.00.00-6 Engenharia QuímicaCu/Nb2O5 and Cu/Nb2O5/Al2O3 were studied as catalysts in ethanol steam-reforming for hydrogen production. They were prepared through impregnation, with different copper and Nb2O5 concentrations. Cu/ZnO/Al2O3 (G66), a commercial catalyst for methanol reforming was used for comparison. Temperature-programmed reduction data showed incomplete reduction of the copper, resulting in two reduction peaks, in opposition to CuO bulk, whose reduction occurred in one step (only one peak), it evidences a copper modification through Nb2O5. Results of diffuse reflectance spectra also evidenced the interaction. The catalytic tests showed that the niobium oxide dispersion on alumina improved the catalyst action; the ternary catalysts are the ones that show higher hydrogen production. They also produce ethyl ether as side product. The binary catalysts don't present parallel reaction, probably because when Cu/Nb2O5 is dispersed on alumina there is another type of catalytic site production, which produces ethyl ether.Reforma de etanol com vapor d’água, para produção de hidrogênio, foi estudada sobre catalisadores Cu/Nb2O5 e Cu/Nb2O5/Al2O3. Eles foram preparados por impregnação, com diferentes concentrações de cobre e Nb2O5. Um catalisador comercial, Cu/ZnO/Al2O3 (G66), de reforma do metanol, foi usado para comparação. Dados de redução à temperatura programada mostraram incompleta redução do cobre, com formação de dois picos de redução diferentemente do CuO mássico, cuja redução ocorre em uma única etapa (somente um pico), evidenciando que o cobre é modificado ao ser suportado sobre Nb2O5. Resultados de espectroscopia de reflectância difusa também evidenciam a interação. Testes catalíticos mostraram que a dispersão do pentóxido de nióbio sobre alumina melhorou a ação do catalisador, uma vez que os catalisadores ternários são os que apresentam maior produção de hidrogênio, apesar de também produzirem éter etílico como subproduto. Os catalisadores binários não catalisam reações paralelas, provavelmente, porque, quando Cu/Nb2O5 está disperso sobre alumina, há formação de um novo sítio ativo o qual produz éter etílico.Universidade Estadual De Maringá2008-04-22info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttp://www.periodicos.uem.br/ojs/index.php/ActaSciTechnol/article/view/248410.4025/actascitechnol.v24i0.2484Acta Scientiarum. Technology; Vol 24 (2002); 1637-1642Acta Scientiarum. Technology; v. 24 (2002); 1637-16421806-25631807-8664reponame:Acta scientiarum. Technology (Online)instname:Universidade Estadual de Maringá (UEM)instacron:UEMporhttp://www.periodicos.uem.br/ojs/index.php/ActaSciTechnol/article/view/2484/1559Machado, Nádia Regina Camardo FernandesRizzo, Roberta Carolina PelissariPeguin, Robson Pablo Sobradielinfo:eu-repo/semantics/openAccess2024-05-17T13:02:44Zoai:periodicos.uem.br/ojs:article/2484Revistahttps://www.periodicos.uem.br/ojs/index.php/ActaSciTechnol/indexPUBhttps://www.periodicos.uem.br/ojs/index.php/ActaSciTechnol/oai||actatech@uem.br1807-86641806-2563opendoar:2024-05-17T13:02:44Acta scientiarum. Technology (Online) - Universidade Estadual de Maringá (UEM)false
dc.title.none.fl_str_mv Performance of catalysts with Nb2O5 for hydrogen production from ethanol steam reforming
Desempenho de catalisadores com Nb2O5 para produção de hidrogênio a partir da reforma de etanol com vapor d’água
title Performance of catalysts with Nb2O5 for hydrogen production from ethanol steam reforming
spellingShingle Performance of catalysts with Nb2O5 for hydrogen production from ethanol steam reforming
Machado, Nádia Regina Camardo Fernandes
reforma de etanol com vapor d’água
produção de hidrogênio
catalisadores Cu/Nb2O5
3.06.00.00-6 Engenharia Química
title_short Performance of catalysts with Nb2O5 for hydrogen production from ethanol steam reforming
title_full Performance of catalysts with Nb2O5 for hydrogen production from ethanol steam reforming
title_fullStr Performance of catalysts with Nb2O5 for hydrogen production from ethanol steam reforming
title_full_unstemmed Performance of catalysts with Nb2O5 for hydrogen production from ethanol steam reforming
title_sort Performance of catalysts with Nb2O5 for hydrogen production from ethanol steam reforming
author Machado, Nádia Regina Camardo Fernandes
author_facet Machado, Nádia Regina Camardo Fernandes
Rizzo, Roberta Carolina Pelissari
Peguin, Robson Pablo Sobradiel
author_role author
author2 Rizzo, Roberta Carolina Pelissari
Peguin, Robson Pablo Sobradiel
author2_role author
author
dc.contributor.author.fl_str_mv Machado, Nádia Regina Camardo Fernandes
Rizzo, Roberta Carolina Pelissari
Peguin, Robson Pablo Sobradiel
dc.subject.por.fl_str_mv reforma de etanol com vapor d’água
produção de hidrogênio
catalisadores Cu/Nb2O5
3.06.00.00-6 Engenharia Química
topic reforma de etanol com vapor d’água
produção de hidrogênio
catalisadores Cu/Nb2O5
3.06.00.00-6 Engenharia Química
description Cu/Nb2O5 and Cu/Nb2O5/Al2O3 were studied as catalysts in ethanol steam-reforming for hydrogen production. They were prepared through impregnation, with different copper and Nb2O5 concentrations. Cu/ZnO/Al2O3 (G66), a commercial catalyst for methanol reforming was used for comparison. Temperature-programmed reduction data showed incomplete reduction of the copper, resulting in two reduction peaks, in opposition to CuO bulk, whose reduction occurred in one step (only one peak), it evidences a copper modification through Nb2O5. Results of diffuse reflectance spectra also evidenced the interaction. The catalytic tests showed that the niobium oxide dispersion on alumina improved the catalyst action; the ternary catalysts are the ones that show higher hydrogen production. They also produce ethyl ether as side product. The binary catalysts don't present parallel reaction, probably because when Cu/Nb2O5 is dispersed on alumina there is another type of catalytic site production, which produces ethyl ether.
publishDate 2008
dc.date.none.fl_str_mv 2008-04-22
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://www.periodicos.uem.br/ojs/index.php/ActaSciTechnol/article/view/2484
10.4025/actascitechnol.v24i0.2484
url http://www.periodicos.uem.br/ojs/index.php/ActaSciTechnol/article/view/2484
identifier_str_mv 10.4025/actascitechnol.v24i0.2484
dc.language.iso.fl_str_mv por
language por
dc.relation.none.fl_str_mv http://www.periodicos.uem.br/ojs/index.php/ActaSciTechnol/article/view/2484/1559
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Universidade Estadual De Maringá
publisher.none.fl_str_mv Universidade Estadual De Maringá
dc.source.none.fl_str_mv Acta Scientiarum. Technology; Vol 24 (2002); 1637-1642
Acta Scientiarum. Technology; v. 24 (2002); 1637-1642
1806-2563
1807-8664
reponame:Acta scientiarum. Technology (Online)
instname:Universidade Estadual de Maringá (UEM)
instacron:UEM
instname_str Universidade Estadual de Maringá (UEM)
instacron_str UEM
institution UEM
reponame_str Acta scientiarum. Technology (Online)
collection Acta scientiarum. Technology (Online)
repository.name.fl_str_mv Acta scientiarum. Technology (Online) - Universidade Estadual de Maringá (UEM)
repository.mail.fl_str_mv ||actatech@uem.br
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