In-situ DRIFTS steady-state study of CO2 and CO methanation over Ni-promoted catalysts

Promoting the performance of catalytic systems by incorporating small amount of alkali has been proved effective for several reactions whilst controversial outcomes are reported for the synthetic natural gas production. This work studies a series of Ni catalysts for CO2 and CO methanation reactions....

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Autores: González Castaño, Míriam, González Arias, Judith, Bobadilla Baladrón, Luis Francisco, Ruiz-López, E., Odriozola Gordón, José Antonio, Arellano-García, H.
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2023
País:España
Institución:Universidad de Sevilla (US)
Repositorio:idUS. Depósito de Investigación de la Universidad de Sevilla
OAI Identifier:oai:idus.us.es:11441/182971
Acceso en línea:https://hdl.handle.net/11441/182971
https://doi.org/10.1016/j.fuel.2022.127241
Access Level:acceso abierto
Palabra clave:Potassium
Alkalis
Ni
Ni-Fe alloys
Bimetallic catalysts
CO methanation
CO2 methanation
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spelling In-situ DRIFTS steady-state study of CO2 and CO methanation over Ni-promoted catalystsGonzález Castaño, MíriamGonzález Arias, JudithBobadilla Baladrón, Luis FranciscoRuiz-López, E.Odriozola Gordón, José AntonioArellano-García, H.PotassiumAlkalisNiNi-Fe alloysBimetallic catalystsCO methanationCO2 methanationPromoting the performance of catalytic systems by incorporating small amount of alkali has been proved effective for several reactions whilst controversial outcomes are reported for the synthetic natural gas production. This work studies a series of Ni catalysts for CO2 and CO methanation reactions. In-situ DRIFTS spectroscopy evidenced similar reaction intermediates for all evaluated systems and it is proposed a reaction mechanism based on: i) formate decomposition and ii) hydrogenation of lineal carbonyl species to methane. Compared to bare Ni, the enhanced CO2 methanation rates attained by NiFe/Al and NiFeK/Al systems are associated to promoted formates decomposition into lineal carbonyl species. Also for CO methanation, the differences in the catalysts’ performances were associated to the relative concentration of lineal carbonyl species. Under CO methanation conditions and opposing the CO2 methanation results where the incorporation of K delivered promoted catalytic behaviours, worsened CO methanation rates were discerned for the NiFeK/Al system.ElsevierQuímica InorgánicaIngeniería Química y AmbientalEuropean Union (UE)2023info:eu-repo/semantics/articleinfo:eu-repo/semantics/acceptedVersionapplication/pdfapplication/pdfhttps://hdl.handle.net/11441/182971https://doi.org/10.1016/j.fuel.2022.127241reponame:idUS. Depósito de Investigación de la Universidad de Sevillainstname:Universidad de Sevilla (US)InglésFuel, 338, 127241.MZAMBRANO-2021-19889https://www.sciencedirect.com/science/article/abs/pii/S0016236122040650?via%3Dihubinfo:eu-repo/semantics/openAccessoai:idus.us.es:11441/1829712026-06-17T12:51:07Z
dc.title.none.fl_str_mv In-situ DRIFTS steady-state study of CO2 and CO methanation over Ni-promoted catalysts
title In-situ DRIFTS steady-state study of CO2 and CO methanation over Ni-promoted catalysts
spellingShingle In-situ DRIFTS steady-state study of CO2 and CO methanation over Ni-promoted catalysts
González Castaño, Míriam
Potassium
Alkalis
Ni
Ni-Fe alloys
Bimetallic catalysts
CO methanation
CO2 methanation
title_short In-situ DRIFTS steady-state study of CO2 and CO methanation over Ni-promoted catalysts
title_full In-situ DRIFTS steady-state study of CO2 and CO methanation over Ni-promoted catalysts
title_fullStr In-situ DRIFTS steady-state study of CO2 and CO methanation over Ni-promoted catalysts
title_full_unstemmed In-situ DRIFTS steady-state study of CO2 and CO methanation over Ni-promoted catalysts
title_sort In-situ DRIFTS steady-state study of CO2 and CO methanation over Ni-promoted catalysts
dc.creator.none.fl_str_mv González Castaño, Míriam
González Arias, Judith
Bobadilla Baladrón, Luis Francisco
Ruiz-López, E.
Odriozola Gordón, José Antonio
Arellano-García, H.
author González Castaño, Míriam
author_facet González Castaño, Míriam
González Arias, Judith
Bobadilla Baladrón, Luis Francisco
Ruiz-López, E.
Odriozola Gordón, José Antonio
Arellano-García, H.
author_role author
author2 González Arias, Judith
Bobadilla Baladrón, Luis Francisco
Ruiz-López, E.
Odriozola Gordón, José Antonio
Arellano-García, H.
author2_role author
author
author
author
author
dc.contributor.none.fl_str_mv Química Inorgánica
Ingeniería Química y Ambiental
European Union (UE)
dc.subject.none.fl_str_mv Potassium
Alkalis
Ni
Ni-Fe alloys
Bimetallic catalysts
CO methanation
CO2 methanation
topic Potassium
Alkalis
Ni
Ni-Fe alloys
Bimetallic catalysts
CO methanation
CO2 methanation
description Promoting the performance of catalytic systems by incorporating small amount of alkali has been proved effective for several reactions whilst controversial outcomes are reported for the synthetic natural gas production. This work studies a series of Ni catalysts for CO2 and CO methanation reactions. In-situ DRIFTS spectroscopy evidenced similar reaction intermediates for all evaluated systems and it is proposed a reaction mechanism based on: i) formate decomposition and ii) hydrogenation of lineal carbonyl species to methane. Compared to bare Ni, the enhanced CO2 methanation rates attained by NiFe/Al and NiFeK/Al systems are associated to promoted formates decomposition into lineal carbonyl species. Also for CO methanation, the differences in the catalysts’ performances were associated to the relative concentration of lineal carbonyl species. Under CO methanation conditions and opposing the CO2 methanation results where the incorporation of K delivered promoted catalytic behaviours, worsened CO methanation rates were discerned for the NiFeK/Al system.
publishDate 2023
dc.date.none.fl_str_mv 2023
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/11441/182971
https://doi.org/10.1016/j.fuel.2022.127241
url https://hdl.handle.net/11441/182971
https://doi.org/10.1016/j.fuel.2022.127241
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Fuel, 338, 127241.
MZAMBRANO-2021-19889
https://www.sciencedirect.com/science/article/abs/pii/S0016236122040650?via%3Dihub
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 Elsevier
publisher.none.fl_str_mv Elsevier
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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