Hydrogen and electricity at once : an alkaline-acidic ethanol electroreformer

This study presents the results of an alkaline-acidic ethanol electroreformer producing hydrogen and electricity simultaneously. This is due to the pH gradient between an alkaline anolyte/fuel (1 mol/L ethanol and 4 mol/L KOH) and an acidic catholyte/comburent (1 mol/L H2SO4), separated by a K+-pret...

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Detalles Bibliográficos
Autores: Amorim, Fernando M. de Lino, Crisafulli, Rudy, Linares Léon, José Joaquín
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2023
País:Brasil
Institución:Universidade de Brasília (UnB)
Repositorio:Repositório Institucional da UnB
Idioma:inglés
OAI Identifier:oai:repositorio.unb.br:10482/50553
Acceso en línea:http://repositorio.unb.br/handle/10482/50553
https://doi.org/10.1016/j.elecom.2023.107452
Access Level:acceso abierto
Palabra clave:Etanol
Hidrogênio
Eletricidade
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spelling Hydrogen and electricity at once : an alkaline-acidic ethanol electroreformerEtanolHidrogênioEletricidadeThis study presents the results of an alkaline-acidic ethanol electroreformer producing hydrogen and electricity simultaneously. This is due to the pH gradient between an alkaline anolyte/fuel (1 mol/L ethanol and 4 mol/L KOH) and an acidic catholyte/comburent (1 mol/L H2SO4), separated by a K+-pretreated Nafion® 211 membrane to prevent chemical neutralization, resulting in an extra electromotive force. At 70 °C, the electroreformer delivers a maximum power density of 23 mW cm−2. An increase in the flow rate from 0.17 to 1.12 mL min−1 is also beneficial due to the mass transport enhancement. Finally, over the stability tests for 3 h at 50 °C and a flow rate of 1.12 mL min−1, it is possible to produce H2 at an average rate of 0.218 and 0.267 STP m3 m-2h−1, and an average energy of 0.0877 and 0.0997 kWh m−2 in recirculation and single-pass mode, respectively. The worse performance in the recirculation mode seems to be due to the accumulation of the ethanol electro-oxidation products, resulting in the poisoning of the catalyst surface.Instituto de Química (IQ)Elsevier B. V.Universidade de Brasília, Instituto de QuímicaUniversidade de Brasília, Instituto de QuímicaUniversidade de Brasília, Instituto de Química2024-10-11T12:42:53Z2024-10-11T12:42:53Z2023-02-07info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfAMORIM, Fernando M. de L.; CRISAFULLI, Rudy; LINARES, José J. Hydrogen and electricity at once: an alkaline-acidic ethanol electroreformer. Electrochemistry Communications, [S. l.], v. 148, 107452, mar. 2023. DOI: https://doi.org/10.1016/j.elecom.2023.107452. Disponível em: https://www.sciencedirect.com/science/article/pii/S1388248123000267?via%3Dihub. Acesso em: 11 out. 2024.http://repositorio.unb.br/handle/10482/50553https://doi.org/10.1016/j.elecom.2023.107452engThis is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).info:eu-repo/semantics/openAccessreponame:Repositório Institucional da UnBinstname:Universidade de Brasília (UnB)instacron:UNBAmorim, Fernando M. de LinoCrisafulli, RudyLinares Léon, José Joaquín2024-10-11T12:42:54Zoai:repositorio.unb.br:10482/50553Repositório InstitucionalPUBhttps://repositorio.unb.br/oai/requestrepositorio@unb.bropendoar:2024-10-11T12:42:54Repositório Institucional da UnB - Universidade de Brasília (UnB)false
dc.title.none.fl_str_mv Hydrogen and electricity at once : an alkaline-acidic ethanol electroreformer
title Hydrogen and electricity at once : an alkaline-acidic ethanol electroreformer
spellingShingle Hydrogen and electricity at once : an alkaline-acidic ethanol electroreformer
Amorim, Fernando M. de Lino
Etanol
Hidrogênio
Eletricidade
title_short Hydrogen and electricity at once : an alkaline-acidic ethanol electroreformer
title_full Hydrogen and electricity at once : an alkaline-acidic ethanol electroreformer
title_fullStr Hydrogen and electricity at once : an alkaline-acidic ethanol electroreformer
title_full_unstemmed Hydrogen and electricity at once : an alkaline-acidic ethanol electroreformer
title_sort Hydrogen and electricity at once : an alkaline-acidic ethanol electroreformer
dc.creator.none.fl_str_mv Amorim, Fernando M. de Lino
Crisafulli, Rudy
Linares Léon, José Joaquín
author Amorim, Fernando M. de Lino
author_facet Amorim, Fernando M. de Lino
Crisafulli, Rudy
Linares Léon, José Joaquín
author_role author
author2 Crisafulli, Rudy
Linares Léon, José Joaquín
author2_role author
author
dc.contributor.none.fl_str_mv Universidade de Brasília, Instituto de Química
Universidade de Brasília, Instituto de Química
Universidade de Brasília, Instituto de Química
dc.subject.por.fl_str_mv Etanol
Hidrogênio
Eletricidade
topic Etanol
Hidrogênio
Eletricidade
description This study presents the results of an alkaline-acidic ethanol electroreformer producing hydrogen and electricity simultaneously. This is due to the pH gradient between an alkaline anolyte/fuel (1 mol/L ethanol and 4 mol/L KOH) and an acidic catholyte/comburent (1 mol/L H2SO4), separated by a K+-pretreated Nafion® 211 membrane to prevent chemical neutralization, resulting in an extra electromotive force. At 70 °C, the electroreformer delivers a maximum power density of 23 mW cm−2. An increase in the flow rate from 0.17 to 1.12 mL min−1 is also beneficial due to the mass transport enhancement. Finally, over the stability tests for 3 h at 50 °C and a flow rate of 1.12 mL min−1, it is possible to produce H2 at an average rate of 0.218 and 0.267 STP m3 m-2h−1, and an average energy of 0.0877 and 0.0997 kWh m−2 in recirculation and single-pass mode, respectively. The worse performance in the recirculation mode seems to be due to the accumulation of the ethanol electro-oxidation products, resulting in the poisoning of the catalyst surface.
publishDate 2023
dc.date.none.fl_str_mv 2023-02-07
2024-10-11T12:42:53Z
2024-10-11T12:42:53Z
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 AMORIM, Fernando M. de L.; CRISAFULLI, Rudy; LINARES, José J. Hydrogen and electricity at once: an alkaline-acidic ethanol electroreformer. Electrochemistry Communications, [S. l.], v. 148, 107452, mar. 2023. DOI: https://doi.org/10.1016/j.elecom.2023.107452. Disponível em: https://www.sciencedirect.com/science/article/pii/S1388248123000267?via%3Dihub. Acesso em: 11 out. 2024.
http://repositorio.unb.br/handle/10482/50553
https://doi.org/10.1016/j.elecom.2023.107452
identifier_str_mv AMORIM, Fernando M. de L.; CRISAFULLI, Rudy; LINARES, José J. Hydrogen and electricity at once: an alkaline-acidic ethanol electroreformer. Electrochemistry Communications, [S. l.], v. 148, 107452, mar. 2023. DOI: https://doi.org/10.1016/j.elecom.2023.107452. Disponível em: https://www.sciencedirect.com/science/article/pii/S1388248123000267?via%3Dihub. Acesso em: 11 out. 2024.
url http://repositorio.unb.br/handle/10482/50553
https://doi.org/10.1016/j.elecom.2023.107452
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 Elsevier B. V.
publisher.none.fl_str_mv Elsevier B. V.
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
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score 15,198674

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