Highly efficient deep desulfurization of fuels by chemical oxidation

This paper describes the oxidation of several model S-containing molecules with hydrogen peroxide in L–L phase system using a heterogeneous catalyst under atmospheric pressure in the 333-353 K temperature range. Molybdenum and tungsten compounds are prepared by anion exchange with alkylammonium deri...

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Detalhes bibliográficos
Autores: Capel Sánchez, María del Carmen, Pérez Presas, Patricia, Campos Martín, José Miguel, García Fierro, José Luis
Tipo de documento: artigo
Data de publicação:2010
País:España
Recursos:Consejo Superior de Investigaciones Científicas (CSIC)
Repositório:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/20516
Acesso em linha:http://hdl.handle.net/10261/20516
Access Level:Acceso aberto
Palavra-chave:Liquid phase reactions
ODS
Oxidation
Hydrogen peroxide
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spelling Highly efficient deep desulfurization of fuels by chemical oxidationCapel Sánchez, María del CarmenPérez Presas, PatriciaCampos Martín, José MiguelGarcía Fierro, José LuisLiquid phase reactionsODSOxidationHydrogen peroxideThis paper describes the oxidation of several model S-containing molecules with hydrogen peroxide in L–L phase system using a heterogeneous catalyst under atmospheric pressure in the 333-353 K temperature range. Molybdenum and tungsten compounds are prepared by anion exchange with alkylammonium derivatives covalently anchored to silica gel. These solids are robust heterogeneous catalysts able to activate selectively hydrogen peroxide to remove sulfur compounds via oxidation (ODS). The influence of several reaction variables (the support, the reaction temperature, the nature of the substrate, the solvent, the molar ratio of the oxidant (H2O2), the S-containing molecule, the catalysts nature and the reuse of the catalysts) on the performance was examined. The potential of this methodology is illustrated by the complete S-removal from a 0.2 wt% dibenzothiophene mixture at 353 K in less than 1 h of reaction. Molybdenum catalysts exposed to hydrogen peroxide form peroxomolybdates moieties which are more active than acid precursors. The activated Mo catalysts are very active in ODS reaction and can be reused four times without lose of activity.Peer reviewed201020102010info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501185790 bytesapplication/pdfhttp://hdl.handle.net/10261/20516reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)InglésCatalysis TodayCATTOD653810.1016/j.cattod.2010.01.047info:eu-repo/semantics/openAccessoai:digital.csic.es:10261/205162026-05-22T06:33:51Z
dc.title.none.fl_str_mv Highly efficient deep desulfurization of fuels by chemical oxidation
title Highly efficient deep desulfurization of fuels by chemical oxidation
spellingShingle Highly efficient deep desulfurization of fuels by chemical oxidation
Capel Sánchez, María del Carmen
Liquid phase reactions
ODS
Oxidation
Hydrogen peroxide
title_short Highly efficient deep desulfurization of fuels by chemical oxidation
title_full Highly efficient deep desulfurization of fuels by chemical oxidation
title_fullStr Highly efficient deep desulfurization of fuels by chemical oxidation
title_full_unstemmed Highly efficient deep desulfurization of fuels by chemical oxidation
title_sort Highly efficient deep desulfurization of fuels by chemical oxidation
dc.creator.none.fl_str_mv Capel Sánchez, María del Carmen
Pérez Presas, Patricia
Campos Martín, José Miguel
García Fierro, José Luis
author Capel Sánchez, María del Carmen
author_facet Capel Sánchez, María del Carmen
Pérez Presas, Patricia
Campos Martín, José Miguel
García Fierro, José Luis
author_role author
author2 Pérez Presas, Patricia
Campos Martín, José Miguel
García Fierro, José Luis
author2_role author
author
author
dc.subject.none.fl_str_mv Liquid phase reactions
ODS
Oxidation
Hydrogen peroxide
topic Liquid phase reactions
ODS
Oxidation
Hydrogen peroxide
description This paper describes the oxidation of several model S-containing molecules with hydrogen peroxide in L–L phase system using a heterogeneous catalyst under atmospheric pressure in the 333-353 K temperature range. Molybdenum and tungsten compounds are prepared by anion exchange with alkylammonium derivatives covalently anchored to silica gel. These solids are robust heterogeneous catalysts able to activate selectively hydrogen peroxide to remove sulfur compounds via oxidation (ODS). The influence of several reaction variables (the support, the reaction temperature, the nature of the substrate, the solvent, the molar ratio of the oxidant (H2O2), the S-containing molecule, the catalysts nature and the reuse of the catalysts) on the performance was examined. The potential of this methodology is illustrated by the complete S-removal from a 0.2 wt% dibenzothiophene mixture at 353 K in less than 1 h of reaction. Molybdenum catalysts exposed to hydrogen peroxide form peroxomolybdates moieties which are more active than acid precursors. The activated Mo catalysts are very active in ODS reaction and can be reused four times without lose of activity.
publishDate 2010
dc.date.none.fl_str_mv 2010
2010
2010
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/20516
url http://hdl.handle.net/10261/20516
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Catalysis Today
CATTOD6538
10.1016/j.cattod.2010.01.047
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 185790 bytes
application/pdf
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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
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