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Clay exfoliation method as a route to obtain mesoporous catalysts for CO(2) methanation

A unique method for obtaining a mesoporous catalytic support through the exfoliation of a montmorillonite is reported. This method consisted of the intercalation of Na-clay with Al-Keggin species and polyvinyl alcohol followed by microwave irradiation. The mesoporous support was employed to prepare...

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Autores principales: Cortés-Murillo, Daniel, Blanco-Jiménez, Carolina, Daza, Carlos E.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Elsevier 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9763836/
https://www.ncbi.nlm.nih.gov/pubmed/36561323
http://dx.doi.org/10.1016/j.mex.2022.101955
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author Cortés-Murillo, Daniel
Blanco-Jiménez, Carolina
Daza, Carlos E.
author_facet Cortés-Murillo, Daniel
Blanco-Jiménez, Carolina
Daza, Carlos E.
author_sort Cortés-Murillo, Daniel
collection PubMed
description A unique method for obtaining a mesoporous catalytic support through the exfoliation of a montmorillonite is reported. This method consisted of the intercalation of Na-clay with Al-Keggin species and polyvinyl alcohol followed by microwave irradiation. The mesoporous support was employed to prepare Ni-catalysts which were used in the natural gas synthesis through CO(2) methanation. The synthesis method was validated confirming the clay exfoliation and the main formation of mesopores. Also, the Ni-catalysts have mainly weak basic surface properties lower than 38 µmol.g(−1), and containing Ni(0) nanoparticles with sizes between 9 and 12 nm which were thermally stable after reduction and methanation reaction. The catalyst with 5% Ni wt. gave conversions between 50 and 80% with temperatures ranging from 200 to 300 °C and selectivities of 100% towards the formation of CH(4) • Mesoporous catalytic supports are obtained through a unique clay exfoliation method (Al-keggin, PVA, and microwaves). • (3% and 5% wt.) Ni-mesoporous catalysts are thermally stable and Ni(0) nanoparticles between 9 and 12 nm are achieved. • 5%wt. Ni-catalyst have no deactivation up to 8 h at 400 °C and displays unprecedented performance at low temperatures in CO(2)-methanation with 100% of selectivity.
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spelling pubmed-97638362022-12-21 Clay exfoliation method as a route to obtain mesoporous catalysts for CO(2) methanation Cortés-Murillo, Daniel Blanco-Jiménez, Carolina Daza, Carlos E. MethodsX Method Article A unique method for obtaining a mesoporous catalytic support through the exfoliation of a montmorillonite is reported. This method consisted of the intercalation of Na-clay with Al-Keggin species and polyvinyl alcohol followed by microwave irradiation. The mesoporous support was employed to prepare Ni-catalysts which were used in the natural gas synthesis through CO(2) methanation. The synthesis method was validated confirming the clay exfoliation and the main formation of mesopores. Also, the Ni-catalysts have mainly weak basic surface properties lower than 38 µmol.g(−1), and containing Ni(0) nanoparticles with sizes between 9 and 12 nm which were thermally stable after reduction and methanation reaction. The catalyst with 5% Ni wt. gave conversions between 50 and 80% with temperatures ranging from 200 to 300 °C and selectivities of 100% towards the formation of CH(4) • Mesoporous catalytic supports are obtained through a unique clay exfoliation method (Al-keggin, PVA, and microwaves). • (3% and 5% wt.) Ni-mesoporous catalysts are thermally stable and Ni(0) nanoparticles between 9 and 12 nm are achieved. • 5%wt. Ni-catalyst have no deactivation up to 8 h at 400 °C and displays unprecedented performance at low temperatures in CO(2)-methanation with 100% of selectivity. Elsevier 2022-12-02 /pmc/articles/PMC9763836/ /pubmed/36561323 http://dx.doi.org/10.1016/j.mex.2022.101955 Text en © 2022 The Author(s) https://creativecommons.org/licenses/by-nc-nd/4.0/This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
spellingShingle Method Article
Cortés-Murillo, Daniel
Blanco-Jiménez, Carolina
Daza, Carlos E.
Clay exfoliation method as a route to obtain mesoporous catalysts for CO(2) methanation
title Clay exfoliation method as a route to obtain mesoporous catalysts for CO(2) methanation
title_full Clay exfoliation method as a route to obtain mesoporous catalysts for CO(2) methanation
title_fullStr Clay exfoliation method as a route to obtain mesoporous catalysts for CO(2) methanation
title_full_unstemmed Clay exfoliation method as a route to obtain mesoporous catalysts for CO(2) methanation
title_short Clay exfoliation method as a route to obtain mesoporous catalysts for CO(2) methanation
title_sort clay exfoliation method as a route to obtain mesoporous catalysts for co(2) methanation
topic Method Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9763836/
https://www.ncbi.nlm.nih.gov/pubmed/36561323
http://dx.doi.org/10.1016/j.mex.2022.101955
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