Improved phenol degradation by catalytic wet air oxidation on the Co3O4 spinel catalysts supported on SBA-15 modified with TiO2

The removal of phenol from aqueous industrial effluents by catalytic wet-air oxidation (CWAO) is a challenging process that requires novel catalysts resistant to leaching of the active phases during residence time in a batch reactor. In this sense, this work demonstrated that this can be archived wi...

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Autores: López-Chico, D. Y., Pérez-Vidal, H., Torres, G., Lunagómez, M. A., Pawelec, B., Navarro Yerga, R. M., Vázquez-Salas, P. J., Zepeda, T. A.
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2024
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/390030
Acceso en línea:http://hdl.handle.net/10261/390030
https://api.elsevier.com/content/abstract/scopus_id/85182442952
Access Level:acceso abierto
Palabra clave:CWAO
Wastewater treatment
Phenol degradation
Spinel Co3O4 catalysts
SBA-15
TiO2
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spelling Improved phenol degradation by catalytic wet air oxidation on the Co3O4 spinel catalysts supported on SBA-15 modified with TiO2López-Chico, D. Y.Pérez-Vidal, H.Torres, G.Lunagómez, M. A.Pawelec, B.Navarro Yerga, R. M.Vázquez-Salas, P. J.Zepeda, T. A.CWAOWastewater treatmentPhenol degradationSpinel Co3O4 catalystsSBA-15TiO2The removal of phenol from aqueous industrial effluents by catalytic wet-air oxidation (CWAO) is a challenging process that requires novel catalysts resistant to leaching of the active phases during residence time in a batch reactor. In this sense, this work demonstrated that this can be archived with the catalyst having the spinel phase Co3O4 supported on mesoporous silica SBA-15 doped with an optimized amount of TiO2 (3 wt%). In the phenol CWAO reaction carried out at 160 °C and 10 bar O2, this best Co3O4/TiO2/SBA-15 catalyst showed an increase of phenol conversion from 49.0 % to 68.3 % and of CO2 selectivity from 87 % to 98 %. The extensive catalyst characterization and overall activity results indicated that this was related to the strength and nature of the acid sites and the oxidation states of the cobalt oxide phases. Combined factors influenced the final behaviour of the catalyst, such as its intrinsic activity, dispersion of the active phase, inhibition of CoSiO4 phase formation, high Lewis acidity and the large amount of active Co3O4 spinel phase. The presence of TiO2 nanoparticles (NPs) decorating the support surface improved the stability of the catalyst by inhibiting the leaching of cobalt species during the reaction. After three reaction cycles, the most efficient Co/3Ti/S15 catalyst showed high CO2 selectivity (∼92.7 %) and low selectivity towards carboxylic acid (∼5.3 %) and polyphenolic compounds (∼2%). It is proposed that surface oxidation is the rate-determining step in the CWAO reaction over TiO2/SBA-15-supported Co3O4 spinel catalysts.T.A. Zepeda thanks DGAPA-UNAM (IN112922, IN101523 and IA100822 projects) and CONACYT (F003 117373 project) for their financial support. The authors thank F. Ruiz, D. Dominguez, E. Flores, J. Mendoza, I. Gradilla and E. Aparicio for technical assistance. R.M. Navarro Yerga and B. Pawelec thank the Spanish Ministry of Science, Innovation and Universities for financial support through research program PID2019-111219RB-100.Peer reviewedElsevierUniversidad Nacional Autónoma de MéxicoAgencia Estatal de Investigación (España)Ministerio de Ciencia, Innovación y Universidades (España)Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202520252024info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Postprintinfo:eu-repo/semantics/acceptedVersionhttp://hdl.handle.net/10261/390030https://api.elsevier.com/content/abstract/scopus_id/85182442952reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2019-111219RB-I00The underlying dataset has been published as supplementary material of the article in the publisher platform at DOI https://doi.org/10.1016/j.jcat.2023.115272https://doi.org/10.1016/j.jcat.2023.115272Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/3900302026-05-22T06:33:51Z
dc.title.none.fl_str_mv Improved phenol degradation by catalytic wet air oxidation on the Co3O4 spinel catalysts supported on SBA-15 modified with TiO2
title Improved phenol degradation by catalytic wet air oxidation on the Co3O4 spinel catalysts supported on SBA-15 modified with TiO2
spellingShingle Improved phenol degradation by catalytic wet air oxidation on the Co3O4 spinel catalysts supported on SBA-15 modified with TiO2
López-Chico, D. Y.
CWAO
Wastewater treatment
Phenol degradation
Spinel Co3O4 catalysts
SBA-15
TiO2
title_short Improved phenol degradation by catalytic wet air oxidation on the Co3O4 spinel catalysts supported on SBA-15 modified with TiO2
title_full Improved phenol degradation by catalytic wet air oxidation on the Co3O4 spinel catalysts supported on SBA-15 modified with TiO2
title_fullStr Improved phenol degradation by catalytic wet air oxidation on the Co3O4 spinel catalysts supported on SBA-15 modified with TiO2
title_full_unstemmed Improved phenol degradation by catalytic wet air oxidation on the Co3O4 spinel catalysts supported on SBA-15 modified with TiO2
title_sort Improved phenol degradation by catalytic wet air oxidation on the Co3O4 spinel catalysts supported on SBA-15 modified with TiO2
dc.creator.none.fl_str_mv López-Chico, D. Y.
Pérez-Vidal, H.
Torres, G.
Lunagómez, M. A.
Pawelec, B.
Navarro Yerga, R. M.
Vázquez-Salas, P. J.
Zepeda, T. A.
author López-Chico, D. Y.
author_facet López-Chico, D. Y.
Pérez-Vidal, H.
Torres, G.
Lunagómez, M. A.
Pawelec, B.
Navarro Yerga, R. M.
Vázquez-Salas, P. J.
Zepeda, T. A.
author_role author
author2 Pérez-Vidal, H.
Torres, G.
Lunagómez, M. A.
Pawelec, B.
Navarro Yerga, R. M.
Vázquez-Salas, P. J.
Zepeda, T. A.
author2_role author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv Universidad Nacional Autónoma de México
Agencia Estatal de Investigación (España)
Ministerio de Ciencia, Innovación y Universidades (España)
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv CWAO
Wastewater treatment
Phenol degradation
Spinel Co3O4 catalysts
SBA-15
TiO2
topic CWAO
Wastewater treatment
Phenol degradation
Spinel Co3O4 catalysts
SBA-15
TiO2
description The removal of phenol from aqueous industrial effluents by catalytic wet-air oxidation (CWAO) is a challenging process that requires novel catalysts resistant to leaching of the active phases during residence time in a batch reactor. In this sense, this work demonstrated that this can be archived with the catalyst having the spinel phase Co3O4 supported on mesoporous silica SBA-15 doped with an optimized amount of TiO2 (3 wt%). In the phenol CWAO reaction carried out at 160 °C and 10 bar O2, this best Co3O4/TiO2/SBA-15 catalyst showed an increase of phenol conversion from 49.0 % to 68.3 % and of CO2 selectivity from 87 % to 98 %. The extensive catalyst characterization and overall activity results indicated that this was related to the strength and nature of the acid sites and the oxidation states of the cobalt oxide phases. Combined factors influenced the final behaviour of the catalyst, such as its intrinsic activity, dispersion of the active phase, inhibition of CoSiO4 phase formation, high Lewis acidity and the large amount of active Co3O4 spinel phase. The presence of TiO2 nanoparticles (NPs) decorating the support surface improved the stability of the catalyst by inhibiting the leaching of cobalt species during the reaction. After three reaction cycles, the most efficient Co/3Ti/S15 catalyst showed high CO2 selectivity (∼92.7 %) and low selectivity towards carboxylic acid (∼5.3 %) and polyphenolic compounds (∼2%). It is proposed that surface oxidation is the rate-determining step in the CWAO reaction over TiO2/SBA-15-supported Co3O4 spinel catalysts.
publishDate 2024
dc.date.none.fl_str_mv 2024
2025
2025
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Postprint
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/390030
https://api.elsevier.com/content/abstract/scopus_id/85182442952
url http://hdl.handle.net/10261/390030
https://api.elsevier.com/content/abstract/scopus_id/85182442952
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv #PLACEHOLDER_PARENT_METADATA_VALUE#
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2019-111219RB-I00
The underlying dataset has been published as supplementary material of the article in the publisher platform at DOI https://doi.org/10.1016/j.jcat.2023.115272
https://doi.org/10.1016/j.jcat.2023.115272
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
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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