Metal Micro-Monoliths for the Kinetic Study and the Intensification of the Water Gas Shift Reaction

A kinetic study of the water gas shift (WGS) reaction has been carried out on a Pt-based catalyst promoted by a Zr-based proton conductor. The investigation was first performed on powders with diluted feed mixtures and then extended to more severe and representative conditions by using a catalyst co...

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Detalhes bibliográficos
Autores: García Moncada, Nuria, Groppi, Gianpiero, Beretta, Alessandra, Romero Sarria, Francisca, Odriozola Gordón, José Antonio
Formato: artículo
Estado:Versión publicada
Fecha de publicación:2018
País:España
Recursos:Universidad de Sevilla (US)
Repositorio:idUS. Depósito de Investigación de la Universidad de Sevilla
OAI Identifier:oai:idus.us.es:11441/83323
Acesso em linha:https://hdl.handle.net/11441/83323
https://doi.org/10.3390/catal8120594
Access Level:acceso abierto
Palavra-chave:WGS
proton conductor
micromonolith
kinetics
Pt-based catalyst
isothermal microreactor
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spelling Metal Micro-Monoliths for the Kinetic Study and the Intensification of the Water Gas Shift ReactionGarcía Moncada, NuriaGroppi, GianpieroBeretta, AlessandraRomero Sarria, FranciscaOdriozola Gordón, José AntonioWGSproton conductormicromonolithkineticsPt-based catalystisothermal microreactorA kinetic study of the water gas shift (WGS) reaction has been carried out on a Pt-based catalyst promoted by a Zr-based proton conductor. The investigation was first performed on powders with diluted feed mixtures and then extended to more severe and representative conditions by using a catalyst coated metallic micromonolith. Temperature measurements reveal that isothermal conditions were obtained along the micromonolith during the tested conditions. In addition, the very thin catalytic layer allows for the discarding of intraporous resistances, providing excellent conditions to analyse the kinetics of the WGS reaction under the integral regime. The proposed rate expression accounts for independence on CO concentration, an inhibiting effect of H2 and a promoting effect of H2O; kinetic orders on CO and H2 are in line with those reported in the literature for the Pt-based catalyst. Instead, the obtained reaction order of water (0.36) is significantly lower than that reported for unpromoted catalysts (typically 0.77–1.10) in good agreement with the proposed water-enhancer effect of the proton conductor on the rate-limiting step. Metallic micromonoliths turn out to be a powerful tool for the kinetic investigation, due to the absence of mass and heat transport limitations and represent a strategy for the intensification of the WGS unit for future applications of fuel processors in small mobile devices.MDPIQuímica Inorgánica2018info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfapplication/pdfhttps://hdl.handle.net/11441/83323https://doi.org/10.3390/catal8120594reponame:idUS. Depósito de Investigación de la Universidad de Sevillainstname:Universidad de Sevilla (US)InglésCatalysts, 8 (12), 594.https://doi.org/10.3390/catal8120594info:eu-repo/semantics/openAccessoai:idus.us.es:11441/833232026-06-17T12:51:07Z
dc.title.none.fl_str_mv Metal Micro-Monoliths for the Kinetic Study and the Intensification of the Water Gas Shift Reaction
title Metal Micro-Monoliths for the Kinetic Study and the Intensification of the Water Gas Shift Reaction
spellingShingle Metal Micro-Monoliths for the Kinetic Study and the Intensification of the Water Gas Shift Reaction
García Moncada, Nuria
WGS
proton conductor
micromonolith
kinetics
Pt-based catalyst
isothermal microreactor
title_short Metal Micro-Monoliths for the Kinetic Study and the Intensification of the Water Gas Shift Reaction
title_full Metal Micro-Monoliths for the Kinetic Study and the Intensification of the Water Gas Shift Reaction
title_fullStr Metal Micro-Monoliths for the Kinetic Study and the Intensification of the Water Gas Shift Reaction
title_full_unstemmed Metal Micro-Monoliths for the Kinetic Study and the Intensification of the Water Gas Shift Reaction
title_sort Metal Micro-Monoliths for the Kinetic Study and the Intensification of the Water Gas Shift Reaction
dc.creator.none.fl_str_mv García Moncada, Nuria
Groppi, Gianpiero
Beretta, Alessandra
Romero Sarria, Francisca
Odriozola Gordón, José Antonio
author García Moncada, Nuria
author_facet García Moncada, Nuria
Groppi, Gianpiero
Beretta, Alessandra
Romero Sarria, Francisca
Odriozola Gordón, José Antonio
author_role author
author2 Groppi, Gianpiero
Beretta, Alessandra
Romero Sarria, Francisca
Odriozola Gordón, José Antonio
author2_role author
author
author
author
dc.contributor.none.fl_str_mv Química Inorgánica
dc.subject.none.fl_str_mv WGS
proton conductor
micromonolith
kinetics
Pt-based catalyst
isothermal microreactor
topic WGS
proton conductor
micromonolith
kinetics
Pt-based catalyst
isothermal microreactor
description A kinetic study of the water gas shift (WGS) reaction has been carried out on a Pt-based catalyst promoted by a Zr-based proton conductor. The investigation was first performed on powders with diluted feed mixtures and then extended to more severe and representative conditions by using a catalyst coated metallic micromonolith. Temperature measurements reveal that isothermal conditions were obtained along the micromonolith during the tested conditions. In addition, the very thin catalytic layer allows for the discarding of intraporous resistances, providing excellent conditions to analyse the kinetics of the WGS reaction under the integral regime. The proposed rate expression accounts for independence on CO concentration, an inhibiting effect of H2 and a promoting effect of H2O; kinetic orders on CO and H2 are in line with those reported in the literature for the Pt-based catalyst. Instead, the obtained reaction order of water (0.36) is significantly lower than that reported for unpromoted catalysts (typically 0.77–1.10) in good agreement with the proposed water-enhancer effect of the proton conductor on the rate-limiting step. Metallic micromonoliths turn out to be a powerful tool for the kinetic investigation, due to the absence of mass and heat transport limitations and represent a strategy for the intensification of the WGS unit for future applications of fuel processors in small mobile devices.
publishDate 2018
dc.date.none.fl_str_mv 2018
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/11441/83323
https://doi.org/10.3390/catal8120594
url https://hdl.handle.net/11441/83323
https://doi.org/10.3390/catal8120594
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Catalysts, 8 (12), 594.
https://doi.org/10.3390/catal8120594
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv MDPI
publisher.none.fl_str_mv MDPI
dc.source.none.fl_str_mv reponame:idUS. Depósito de Investigación de la Universidad de Sevilla
instname:Universidad de Sevilla (US)
instname_str Universidad de Sevilla (US)
reponame_str idUS. Depósito de Investigación de la Universidad de Sevilla
collection idUS. Depósito de Investigación de la Universidad de Sevilla
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15.198674

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