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
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/57681
Ver los metadatos del registro completo
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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 Técnicas2025-09-29T10:22:46Zoai: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:34982025-09-29 10:22:46.833CONICET 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 |
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1844614220416548864 |
score |
13.070432 |