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Desulfurization of diesel by extraction coupled with Mo-catalyzed sulfoxidation in polyethylene glycol-based deep eutectic solvents

2020-07Journal article Restricted
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dc.contributor.authorJuliao, Diana
dc.contributor.authorGomes, Ana C.
dc.contributor.authorPillinger, Martyn
dc.contributor.authorLopes, Andre D.
dc.contributor.authorValenca, Rita
dc.contributor.authorRibeiro, Jorge C.
dc.contributor.authorGoncalves, Isabel S.
dc.contributor.authorBalula, Salete S.
dc.date.accessioned2021-06-24T11:35:28Z
dc.date.available2021-06-24T11:35:28Z
dc.date.issued2020-07
dc.description.abstractOxidative desulfurization (ODS) is a method of removing sulfur from diesel fuel that has the potential to complement or even replace conventional hydrodesulfurization processes in oil refineries. One of the most promising variants of ODS is extractive and catalytic ODS (ECODS) in which the organic sulfur compounds in the liquid fuel are oxidized and extracted in situ from the oil phase into an extractant phase. In this study, the desulfurizalion of model and real diesel fuel has been performed in ECODS systems employing two different types of deep eutectic solvents (DESs), prepared by combining polyethylene glycol (PEG) as hydrogen bond donor with tetrabutylammonium chloride (TBACl) or choline chloride (ChCl) as hydrogen bond acceptor. The ECODS systems were evaluated with the complexes [MoO2Cl2(DMB)(2)] (1) and [MoO2Cl2(DEO)] (2) (DMB - N,N-dimethylbenzamide, DEO = N,N'-diethyloxamide) as catalysts and 30 wt% H2O2 as oxidant. The effects of different reaction conditions, such as the amount of catalyst, H2O2 and DES, and reaction temperature, were investigated. The combination of complex 1 with the DES ChCl/PEG showed the best performance for the removal of dibenzothiophene, 4-methyldibenzothiophene and 4,6-di methyldibenzothiophene from a high-sulfur (3000 ppm) model diesel, allowing a desulfurization efficiency of 99.6% to be attained at 70 degrees C within 2 h. By applying the optimized model diesel ECODS systems to the treatment of a commercial untreated diesel with a sulfur content of 2300 ppm. 82% of sulfur compounds could be eliminated. These promising results indicate that DESs are a viable alternative to ionic liquids as extraction solvents in ECODS processes. (C) 2020 Elsevier B.V. All rights reserved.
dc.description.sponsorshipproject REQUIMTE-LAQV [FCT (Fundacao para a Ciencia e a Tecnologia)] [UID/QUI/50006/2019]
dc.description.sponsorshipproject CICECO-Aveiro Institute of Materials - Foundation for Science and Technology/MCTES [UIDB/50011/2020, UIDP/50011/2020]
dc.description.sponsorshipFCTPortuguese Foundation for Science and TechnologyEuropean Commission [SFRH/BD/102783/2014]
dc.description.sponsorshipEuropean UnionEuropean Commission [SFRH/BD/102783/2014]
dc.description.sponsorshipMCTES
dc.description.sponsorshipEuropean Social Fund through the program POPH of QREN
dc.description.versioninfo:eu-repo/semantics/publishedVersion
dc.identifier.doi10.1016/j.molliq.2020.113093
dc.identifier.issn0167-7322
dc.identifier.urihttp://hdl.handle.net/10400.1/16446
dc.language.isoeng
dc.peerreviewedyes
dc.publisherElsevier
dc.subjectDeep eutectic solvents
dc.subjectOxidative desulfurization
dc.subjectExtraction
dc.subjectHydrogen peroxide
dc.subjectDioxomolybdenum(VI) catalysts
dc.subjectDiesel
dc.subject.otherChemistry
dc.titleDesulfurization of diesel by extraction coupled with Mo-catalyzed sulfoxidation in polyethylene glycol-based deep eutectic solvents
dc.typejournal article
dspace.entity.typePublication
oaire.citation.startPage113093
oaire.citation.titleJournal of Molecular Liquids
oaire.citation.volume309
person.familyNameD. Lopes
person.givenNameAndré
person.identifier2824636
person.identifier.ciencia-id351E-856A-0300
person.identifier.orcid0000-0002-9702-1216
person.identifier.ridE-2136-2012
person.identifier.scopus-author-id7201958625
rcaap.rightsrestrictedAccess
rcaap.typearticle
relation.isAuthorOfPublicationf2f0fe56-e04d-4229-b37b-2b9f1789fe2d
relation.isAuthorOfPublication.latestForDiscoveryf2f0fe56-e04d-4229-b37b-2b9f1789fe2d

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