A million-channel reformer on a fingertip: Moving down the scale in hydrogen production

Autores
Lopez, Eduardo; Irigoyen, Aitor; Trifonov, Trifon; Rodríguez, Angel; Llorca, Jordi
Año de publicación
2010
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The present contribution reports the design, manufacture and experimental proof of concept of an ethanol micro-reformer for portable-fuel cell feeding. Through photo-assisted electrochemical etching, a silicon micromonolithic substrate with perfectly parallel cylindrical channels of 3.3 μm diameter was achieved (density of channels of ca. 4 × 104 channels mm-2). The channel walls were coated with a cobalt-based catalyst. The resultant functionalized micromonoliths were implemented in a stainless steel microreactor including feed evaporation facilities and electrical heating. The unit was successfully tested for ethanol steam reforming under non-diluted feed conditions at 773 K, achieving high hydrogen specific production rates, high ethanol conversions (>80%) and adequate selectivity profiles, with H2:CO2 molar ratios of ∼3 and low CO outlet concentrations. A performance comparison was performed with two other reforming substrates with the same catalyst formulation, namely, a conventional cordierite monolith and a conventional stainless steel microreactor. Results show for the Si-micromonolithic reactor a remarkable improvement of the specific hydrogen production rate (per unit reactor volume and feed flowrate), operating at considerably reduced residence times, due to the increase in contact area per unit volume. © 2010 Professor T. Nejat Veziroglu.
Fil: Lopez, Eduardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Planta Piloto de Ingeniería Química. Universidad Nacional del Sur. Planta Piloto de Ingeniería Química; Argentina. Universidad Politécnica de Catalunya; España
Fil: Irigoyen, Aitor. Universidad Politécnica de Catalunya; España
Fil: Trifonov, Trifon. Universidad Politécnica de Catalunya; España
Fil: Rodríguez, Angel. Universidad Politécnica de Catalunya; España
Fil: Llorca, Jordi. Universidad Politécnica de Catalunya; España
Materia
Ethanol Reforming
Hydrogen
Macroporous Silicon
Microreactor
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/57681
Acceder
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network_name_str CONICET Digital (CONICET)
spelling A million-channel reformer on a fingertip: Moving down the scale in hydrogen productionLopez, EduardoIrigoyen, AitorTrifonov, TrifonRodríguez, AngelLlorca, JordiEthanol ReformingHydrogenMacroporous SiliconMicroreactorhttps://purl.org/becyt/ford/2.4https://purl.org/becyt/ford/2The present contribution reports the design, manufacture and experimental proof of concept of an ethanol micro-reformer for portable-fuel cell feeding. Through photo-assisted electrochemical etching, a silicon micromonolithic substrate with perfectly parallel cylindrical channels of 3.3 μm diameter was achieved (density of channels of ca. 4 × 104 channels mm-2). The channel walls were coated with a cobalt-based catalyst. The resultant functionalized micromonoliths were implemented in a stainless steel microreactor including feed evaporation facilities and electrical heating. The unit was successfully tested for ethanol steam reforming under non-diluted feed conditions at 773 K, achieving high hydrogen specific production rates, high ethanol conversions (>80%) and adequate selectivity profiles, with H2:CO2 molar ratios of ∼3 and low CO outlet concentrations. A performance comparison was performed with two other reforming substrates with the same catalyst formulation, namely, a conventional cordierite monolith and a conventional stainless steel microreactor. Results show for the Si-micromonolithic reactor a remarkable improvement of the specific hydrogen production rate (per unit reactor volume and feed flowrate), operating at considerably reduced residence times, due to the increase in contact area per unit volume. © 2010 Professor T. Nejat Veziroglu.Fil: Lopez, Eduardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Planta Piloto de Ingeniería Química. Universidad Nacional del Sur. Planta Piloto de Ingeniería Química; Argentina. Universidad Politécnica de Catalunya; EspañaFil: Irigoyen, Aitor. Universidad Politécnica de Catalunya; EspañaFil: Trifonov, Trifon. Universidad Politécnica de Catalunya; EspañaFil: Rodríguez, Angel. Universidad Politécnica de Catalunya; EspañaFil: Llorca, Jordi. Universidad Politécnica de Catalunya; EspañaPergamon-Elsevier Science Ltd2010-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/57681Lopez, Eduardo; Irigoyen, Aitor; Trifonov, Trifon; Rodríguez, Angel; Llorca, Jordi; A million-channel reformer on a fingertip: Moving down the scale in hydrogen production; Pergamon-Elsevier Science Ltd; International Journal of Hydrogen Energy; 35; 8; 1-2010; 3472-34790360-3199CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.ijhydene.2010.01.146info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S036031991000248Xinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-15T15:19:55Zoai:ri.conicet.gov.ar:11336/57681instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-10-15 15:19:56.073CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv A million-channel reformer on a fingertip: Moving down the scale in hydrogen production
title A million-channel reformer on a fingertip: Moving down the scale in hydrogen production
spellingShingle A million-channel reformer on a fingertip: Moving down the scale in hydrogen production
Lopez, Eduardo
Ethanol Reforming
Hydrogen
Macroporous Silicon
Microreactor
title_short A million-channel reformer on a fingertip: Moving down the scale in hydrogen production
title_full A million-channel reformer on a fingertip: Moving down the scale in hydrogen production
title_fullStr A million-channel reformer on a fingertip: Moving down the scale in hydrogen production
title_full_unstemmed A million-channel reformer on a fingertip: Moving down the scale in hydrogen production
title_sort A million-channel reformer on a fingertip: Moving down the scale in hydrogen production
dc.creator.none.fl_str_mv Lopez, Eduardo
Irigoyen, Aitor
Trifonov, Trifon
Rodríguez, Angel
Llorca, Jordi
author Lopez, Eduardo
author_facet Lopez, Eduardo
Irigoyen, Aitor
Trifonov, Trifon
Rodríguez, Angel
Llorca, Jordi
author_role author
author2 Irigoyen, Aitor
Trifonov, Trifon
Rodríguez, Angel
Llorca, Jordi
author2_role author
author
author
author
dc.subject.none.fl_str_mv Ethanol Reforming
Hydrogen
Macroporous Silicon
Microreactor
topic Ethanol Reforming
Hydrogen
Macroporous Silicon
Microreactor
purl_subject.fl_str_mv https://purl.org/becyt/ford/2.4
https://purl.org/becyt/ford/2
dc.description.none.fl_txt_mv The present contribution reports the design, manufacture and experimental proof of concept of an ethanol micro-reformer for portable-fuel cell feeding. Through photo-assisted electrochemical etching, a silicon micromonolithic substrate with perfectly parallel cylindrical channels of 3.3 μm diameter was achieved (density of channels of ca. 4 × 104 channels mm-2). The channel walls were coated with a cobalt-based catalyst. The resultant functionalized micromonoliths were implemented in a stainless steel microreactor including feed evaporation facilities and electrical heating. The unit was successfully tested for ethanol steam reforming under non-diluted feed conditions at 773 K, achieving high hydrogen specific production rates, high ethanol conversions (>80%) and adequate selectivity profiles, with H2:CO2 molar ratios of ∼3 and low CO outlet concentrations. A performance comparison was performed with two other reforming substrates with the same catalyst formulation, namely, a conventional cordierite monolith and a conventional stainless steel microreactor. Results show for the Si-micromonolithic reactor a remarkable improvement of the specific hydrogen production rate (per unit reactor volume and feed flowrate), operating at considerably reduced residence times, due to the increase in contact area per unit volume. © 2010 Professor T. Nejat Veziroglu.
Fil: Lopez, Eduardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Planta Piloto de Ingeniería Química. Universidad Nacional del Sur. Planta Piloto de Ingeniería Química; Argentina. Universidad Politécnica de Catalunya; España
Fil: Irigoyen, Aitor. Universidad Politécnica de Catalunya; España
Fil: Trifonov, Trifon. Universidad Politécnica de Catalunya; España
Fil: Rodríguez, Angel. Universidad Politécnica de Catalunya; España
Fil: Llorca, Jordi. Universidad Politécnica de Catalunya; España
description The present contribution reports the design, manufacture and experimental proof of concept of an ethanol micro-reformer for portable-fuel cell feeding. Through photo-assisted electrochemical etching, a silicon micromonolithic substrate with perfectly parallel cylindrical channels of 3.3 μm diameter was achieved (density of channels of ca. 4 × 104 channels mm-2). The channel walls were coated with a cobalt-based catalyst. The resultant functionalized micromonoliths were implemented in a stainless steel microreactor including feed evaporation facilities and electrical heating. The unit was successfully tested for ethanol steam reforming under non-diluted feed conditions at 773 K, achieving high hydrogen specific production rates, high ethanol conversions (>80%) and adequate selectivity profiles, with H2:CO2 molar ratios of ∼3 and low CO outlet concentrations. A performance comparison was performed with two other reforming substrates with the same catalyst formulation, namely, a conventional cordierite monolith and a conventional stainless steel microreactor. Results show for the Si-micromonolithic reactor a remarkable improvement of the specific hydrogen production rate (per unit reactor volume and feed flowrate), operating at considerably reduced residence times, due to the increase in contact area per unit volume. © 2010 Professor T. Nejat Veziroglu.
publishDate 2010
dc.date.none.fl_str_mv 2010-01
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/57681
Lopez, Eduardo; Irigoyen, Aitor; Trifonov, Trifon; Rodríguez, Angel; Llorca, Jordi; A million-channel reformer on a fingertip: Moving down the scale in hydrogen production; Pergamon-Elsevier Science Ltd; International Journal of Hydrogen Energy; 35; 8; 1-2010; 3472-3479
0360-3199
CONICET Digital
CONICET
url http://hdl.handle.net/11336/57681
identifier_str_mv Lopez, Eduardo; Irigoyen, Aitor; Trifonov, Trifon; Rodríguez, Angel; Llorca, Jordi; A million-channel reformer on a fingertip: Moving down the scale in hydrogen production; Pergamon-Elsevier Science Ltd; International Journal of Hydrogen Energy; 35; 8; 1-2010; 3472-3479
0360-3199
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1016/j.ijhydene.2010.01.146
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S036031991000248X
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Pergamon-Elsevier Science Ltd
publisher.none.fl_str_mv Pergamon-Elsevier Science Ltd
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
_version_ 1846083347978125312
score 13.22299

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