Performance of catalysts with Nb2O5 for hydrogen production from ethanol steam reforming
Autor(a) principal: | |
---|---|
Data de Publicação: | 2008 |
Outros Autores: | , |
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. |
id |
UEM-6_212684107c1d8fb947f6ec1851b64ab0 |
---|---|
oai_identifier_str |
oai:periodicos.uem.br/ojs:article/2484 |
network_acronym_str |
UEM-6 |
network_name_str |
Acta scientiarum. Technology (Online) |
repository_id_str |
|
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 |
_version_ |
1799315332112842752 |