Performance of a direct glycerol fuel cell using KOH doped polybenzimidazole as electrolyte

Detalhes bibliográficos
Autor(a) principal: Nascimento, Ana P.
Data de Publicação: 2014
Outros Autores: Linares León, José Joaquín
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UnB
Texto Completo: http://repositorio.unb.br/handle/10482/29243
https://dx.doi.org/10.5935/0103-5053.20140018
Resumo: This paper studies the influence of the operating variables (glycerol concentration, temperature and feed rate) for a direct glycerol fuel cell fed with glycerol using polybenzimidazole (PBI) impregnated with KOH as electrolyte and Pt/C as catalyst. Temperature displays a beneficial effect up to 75 ºC due to the enhanced conductivity and kinetics of the electrochemical reactions. The optimum cell feed corresponds to 1 mol L-1 glycerol and 4 mol L-1 KOH, supplying sufficient quantities of fuel and electrolyte without massive crossover nor mass transfer limitations. The feed rate increases the performance up to a limit of 2 mL min-1, high enough to guarantee the access of the glycerol and the exit of the products. Finally, the use of binary catalysts (PtRu/C and Pt3Sn/C) is beneficial for increasing the cell performance.
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spelling Performance of a direct glycerol fuel cell using KOH doped polybenzimidazole as electrolyteGlicerol - células a combustívelPolibenzimidazolThis paper studies the influence of the operating variables (glycerol concentration, temperature and feed rate) for a direct glycerol fuel cell fed with glycerol using polybenzimidazole (PBI) impregnated with KOH as electrolyte and Pt/C as catalyst. Temperature displays a beneficial effect up to 75 ºC due to the enhanced conductivity and kinetics of the electrochemical reactions. The optimum cell feed corresponds to 1 mol L-1 glycerol and 4 mol L-1 KOH, supplying sufficient quantities of fuel and electrolyte without massive crossover nor mass transfer limitations. The feed rate increases the performance up to a limit of 2 mL min-1, high enough to guarantee the access of the glycerol and the exit of the products. Finally, the use of binary catalysts (PtRu/C and Pt3Sn/C) is beneficial for increasing the cell performance.Este trabalho mostra os resultados correspondentes ao estudo da influência das variáveis de operação (temperatura, concentração de glicerol, de KOH e vazão de alimentação) de uma célula a combustível de glicerol direto usando o polibenzimidazol (PBI) impregnado com KOH como eletrólito e Pt/C como catalisador. A temperatura mostra um efeito favorável até o valor limite de 75 ºC, causado por melhoras na condutividade e na cinética. A concentração ótima do combustível que alimenta a célula é de 1 mol L-1 em KOH 4 mol L-1, fornecendo suficiente quantidade de combustível e de eletrólito sem cruzamento massivo ao cátodo nem limitações de transferência de matéria. A vazão de alimentação melhora o desempenho até um valor limite de 2 mL min-1, suficiente para garantir o acesso do glicerol e a saída dos produtos. Finalmente, o uso de catalisadores binários (PtRu/C e Pt3Sn/C) resulta benéfico para incrementar o desempenho do sistema.Instituto de Química (IQ)Sociedade Brasileira de Química2017-12-07T05:07:21Z2017-12-07T05:07:21Z2014info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfNASCIMENTO, Ana P.; LINARES, José J. Performance of a direct glycerol fuel cell using KOH doped polybenzimidazole as electrolyte. Journal of the Brazilian Chemical Society, São Paulo, v. 25, n. 3, p. 509-516, mar. 2014. Disponível em: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532014000300014&lng=en&nrm=iso. Acesso em: 13 dez. 2019.http://repositorio.unb.br/handle/10482/29243https://dx.doi.org/10.5935/0103-5053.20140018Journal of the Brazilian Chemical Society - (CC BY NC) - All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License. Fonte: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532014000300014. Acesso em: 13 dez. 2019.info:eu-repo/semantics/openAccessNascimento, Ana P.Linares León, José Joaquínengreponame:Repositório Institucional da UnBinstname:Universidade de Brasília (UnB)instacron:UNB2023-10-20T15:20:27Zoai:repositorio.unb.br:10482/29243Repositório InstitucionalPUBhttps://repositorio.unb.br/oai/requestrepositorio@unb.bropendoar:2023-10-20T15:20:27Repositório Institucional da UnB - Universidade de Brasília (UnB)false
dc.title.none.fl_str_mv Performance of a direct glycerol fuel cell using KOH doped polybenzimidazole as electrolyte
title Performance of a direct glycerol fuel cell using KOH doped polybenzimidazole as electrolyte
spellingShingle Performance of a direct glycerol fuel cell using KOH doped polybenzimidazole as electrolyte
Nascimento, Ana P.
Glicerol - células a combustível
Polibenzimidazol
title_short Performance of a direct glycerol fuel cell using KOH doped polybenzimidazole as electrolyte
title_full Performance of a direct glycerol fuel cell using KOH doped polybenzimidazole as electrolyte
title_fullStr Performance of a direct glycerol fuel cell using KOH doped polybenzimidazole as electrolyte
title_full_unstemmed Performance of a direct glycerol fuel cell using KOH doped polybenzimidazole as electrolyte
title_sort Performance of a direct glycerol fuel cell using KOH doped polybenzimidazole as electrolyte
author Nascimento, Ana P.
author_facet Nascimento, Ana P.
Linares León, José Joaquín
author_role author
author2 Linares León, José Joaquín
author2_role author
dc.contributor.author.fl_str_mv Nascimento, Ana P.
Linares León, José Joaquín
dc.subject.por.fl_str_mv Glicerol - células a combustível
Polibenzimidazol
topic Glicerol - células a combustível
Polibenzimidazol
description This paper studies the influence of the operating variables (glycerol concentration, temperature and feed rate) for a direct glycerol fuel cell fed with glycerol using polybenzimidazole (PBI) impregnated with KOH as electrolyte and Pt/C as catalyst. Temperature displays a beneficial effect up to 75 ºC due to the enhanced conductivity and kinetics of the electrochemical reactions. The optimum cell feed corresponds to 1 mol L-1 glycerol and 4 mol L-1 KOH, supplying sufficient quantities of fuel and electrolyte without massive crossover nor mass transfer limitations. The feed rate increases the performance up to a limit of 2 mL min-1, high enough to guarantee the access of the glycerol and the exit of the products. Finally, the use of binary catalysts (PtRu/C and Pt3Sn/C) is beneficial for increasing the cell performance.
publishDate 2014
dc.date.none.fl_str_mv 2014
2017-12-07T05:07:21Z
2017-12-07T05:07:21Z
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 NASCIMENTO, Ana P.; LINARES, José J. Performance of a direct glycerol fuel cell using KOH doped polybenzimidazole as electrolyte. Journal of the Brazilian Chemical Society, São Paulo, v. 25, n. 3, p. 509-516, mar. 2014. Disponível em: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532014000300014&lng=en&nrm=iso. Acesso em: 13 dez. 2019.
http://repositorio.unb.br/handle/10482/29243
https://dx.doi.org/10.5935/0103-5053.20140018
identifier_str_mv NASCIMENTO, Ana P.; LINARES, José J. Performance of a direct glycerol fuel cell using KOH doped polybenzimidazole as electrolyte. Journal of the Brazilian Chemical Society, São Paulo, v. 25, n. 3, p. 509-516, mar. 2014. Disponível em: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532014000300014&lng=en&nrm=iso. Acesso em: 13 dez. 2019.
url http://repositorio.unb.br/handle/10482/29243
https://dx.doi.org/10.5935/0103-5053.20140018
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.format.none.fl_str_mv application/pdf
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 reponame:Repositório Institucional da UnB
instname:Universidade de Brasília (UnB)
instacron:UNB
instname_str Universidade de Brasília (UnB)
instacron_str UNB
institution UNB
reponame_str Repositório Institucional da UnB
collection Repositório Institucional da UnB
repository.name.fl_str_mv Repositório Institucional da UnB - Universidade de Brasília (UnB)
repository.mail.fl_str_mv repositorio@unb.br
_version_ 1810580881650221056

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