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

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Autor(es): dc.contributorUniversidade de Brasília, Instituto de Química-
Autor(es): dc.contributorUniversidade de Brasília, Instituto de Química-
Autor(es): dc.contributorUniversidade de Brasília, Instituto de Química-
Autor(es): dc.creatorAmorim, Fernando M. de Lino-
Autor(es): dc.creatorCrisafulli, Rudy-
Autor(es): dc.creatorLinares Léon, José Joaquín-
Data de aceite: dc.date.accessioned2024-10-23T16:41:23Z-
Data de disponibilização: dc.date.available2024-10-23T16:41:23Z-
Data de envio: dc.date.issued2024-10-11-
Data de envio: dc.date.issued2024-10-11-
Data de envio: dc.date.issued2023-02-06-
Fonte completa do material: dc.identifierhttp://repositorio.unb.br/handle/10482/50553-
Fonte completa do material: dc.identifierhttps://doi.org/10.1016/j.elecom.2023.107452-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/capes/914761-
Descrição: dc.descriptionThis 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.-
Descrição: dc.descriptionInstituto de Química (IQ)-
Formato: dc.formatapplication/pdf-
Idioma: dc.languageen-
Publicador: dc.publisherElsevier B. V.-
Direitos: dc.rightsAcesso Aberto-
Direitos: dc.rightsThis is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).-
Palavras-chave: dc.subjectEtanol-
Palavras-chave: dc.subjectHidrogênio-
Palavras-chave: dc.subjectEletricidade-
Título: dc.titleHydrogen and electricity at once : an alkaline-acidic ethanol electroreformer-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional – UNB

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