The selective ethanol Guerbet condensation over alkali metal-doped sepiolite

In this study, alkali metal-doped sepiolite based catalysts were developed for the up-grading of ethanol through the Guerbet reaction mechanism. The catalysts were prepared by wetness impregnation with aqueous solution containing alkali metal precursors salts over calcined sepiolite, and finally act...

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Authors: Balestra, Giulia, de Maron, Jacobo, Tabanelli, Tommaso, Cavani, Fabrizio, López Nieto, José Manuel
Format: article
Status:Published version
Publication Date:2023
Country:España
Institution:Consejo Superior de Investigaciones Científicas (CSIC)
Repository:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/311376
Online Access:http://hdl.handle.net/10261/311376
Access Level:Open access
Keyword:Ethanol
Guerbet reaction
Butanol
Gas-phase
Continuous-flow processes
Sepiolite
Heterogenous catalyst
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spelling The selective ethanol Guerbet condensation over alkali metal-doped sepioliteBalestra, Giuliade Maron, JacoboTabanelli, TommasoCavani, FabrizioLópez Nieto, José ManuelEthanolGuerbet reactionButanolGas-phaseContinuous-flow processesSepioliteHeterogenous catalystIn this study, alkali metal-doped sepiolite based catalysts were developed for the up-grading of ethanol through the Guerbet reaction mechanism. The catalysts were prepared by wetness impregnation with aqueous solution containing alkali metal precursors salts over calcined sepiolite, and finally activated at 500ºC in air. The catalysts have been characterized by XRD, SEM-EDS, TGA-DSC, N2-adsorption. In addition, TPD-CO2 and TPD-NH3 were used to determine the acid and basic characteristics of catalysts. The catalysts were tested into a quartz continuous gas-flow reaction system working at atmospheric pressure to investigate the effects of metal loading (wt%), the nature of the alkali metals and of the main reaction parameters (e.g., reaction temperature, weight hourly space velocity), on the production of n-butanol starting from ethanol. The highest yield (18%) was obtained at 400 ºC with the catalyst consisting in sepiolite, calcined at 500ºC, impregnated with 7 wt% of Cs. This study proves that ad hoc modified natural sepiolites with alkali metals are effective catalysts for the Guerbet upgrading of ethanol.The authors would like to acknowledge the Ministerio de Ciencia e Innovación of Spain (TED2021-130756B-C31).Peer reviewedElsevier BVMinisterio de Ciencia e Innovación (España)López Nieto, José M. [0000-0002-6960-3219]Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202320232023info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionapplication/pdfhttp://hdl.handle.net/10261/311376reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttps://doi.org/10.1016/j.cattod.2023.01.020Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/3113762026-05-22T06:33:51Z
dc.title.none.fl_str_mv The selective ethanol Guerbet condensation over alkali metal-doped sepiolite
title The selective ethanol Guerbet condensation over alkali metal-doped sepiolite
spellingShingle The selective ethanol Guerbet condensation over alkali metal-doped sepiolite
Balestra, Giulia
Ethanol
Guerbet reaction
Butanol
Gas-phase
Continuous-flow processes
Sepiolite
Heterogenous catalyst
title_short The selective ethanol Guerbet condensation over alkali metal-doped sepiolite
title_full The selective ethanol Guerbet condensation over alkali metal-doped sepiolite
title_fullStr The selective ethanol Guerbet condensation over alkali metal-doped sepiolite
title_full_unstemmed The selective ethanol Guerbet condensation over alkali metal-doped sepiolite
title_sort The selective ethanol Guerbet condensation over alkali metal-doped sepiolite
dc.creator.none.fl_str_mv Balestra, Giulia
de Maron, Jacobo
Tabanelli, Tommaso
Cavani, Fabrizio
López Nieto, José Manuel
author Balestra, Giulia
author_facet Balestra, Giulia
de Maron, Jacobo
Tabanelli, Tommaso
Cavani, Fabrizio
López Nieto, José Manuel
author_role author
author2 de Maron, Jacobo
Tabanelli, Tommaso
Cavani, Fabrizio
López Nieto, José Manuel
author2_role author
author
author
author
dc.contributor.none.fl_str_mv Ministerio de Ciencia e Innovación (España)
López Nieto, José M. [0000-0002-6960-3219]
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Ethanol
Guerbet reaction
Butanol
Gas-phase
Continuous-flow processes
Sepiolite
Heterogenous catalyst
topic Ethanol
Guerbet reaction
Butanol
Gas-phase
Continuous-flow processes
Sepiolite
Heterogenous catalyst
description In this study, alkali metal-doped sepiolite based catalysts were developed for the up-grading of ethanol through the Guerbet reaction mechanism. The catalysts were prepared by wetness impregnation with aqueous solution containing alkali metal precursors salts over calcined sepiolite, and finally activated at 500ºC in air. The catalysts have been characterized by XRD, SEM-EDS, TGA-DSC, N2-adsorption. In addition, TPD-CO2 and TPD-NH3 were used to determine the acid and basic characteristics of catalysts. The catalysts were tested into a quartz continuous gas-flow reaction system working at atmospheric pressure to investigate the effects of metal loading (wt%), the nature of the alkali metals and of the main reaction parameters (e.g., reaction temperature, weight hourly space velocity), on the production of n-butanol starting from ethanol. The highest yield (18%) was obtained at 400 ºC with the catalyst consisting in sepiolite, calcined at 500ºC, impregnated with 7 wt% of Cs. This study proves that ad hoc modified natural sepiolites with alkali metals are effective catalysts for the Guerbet upgrading of ethanol.
publishDate 2023
dc.date.none.fl_str_mv 2023
2023
2023
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Publisher's version
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/311376
url http://hdl.handle.net/10261/311376
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv https://doi.org/10.1016/j.cattod.2023.01.020
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Elsevier BV
publisher.none.fl_str_mv Elsevier BV
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,811543

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