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Catalytic oxidative/extractive desulfurization of model and untreated diesel using hybrid based zinc-substituted polyoxometalates

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dc.contributor.authorRibeiro, Susana O.
dc.contributor.authorJulião, Diana
dc.contributor.authorCunha-Silva, Luís
dc.contributor.authorDomingues, Valentina F.
dc.contributor.authorValença, Rita
dc.contributor.authorRibeiro, Jorge C.
dc.contributor.authorCastro, Baltazar de
dc.contributor.authorBalula, Salete S.
dc.date.accessioned2017-01-11T12:14:11Z
dc.date.embargo2115-11
dc.date.issued2016
dc.description.abstractThe desulfurization efficiency of various hybrid zinc-substituted polyoxometalates ([PW11Zn(H2O)O39]5−, abbreviated as PW11Zn) was here investigated for the first time and optimized using sustainable systems conciliating successfully the liquid–liquid extraction and the oxidative catalytic process. Initially, the desulfurization studies were performed using a model diesel containing a mixture of the most refractory sulfur compounds and later extended to an untreated real diesel. In both cases, acetonitrile was used as extraction solvent and aqueous H2O2 as oxidant. High level of desulfurization was achieved using model and untreated diesels after few hours. The quaternary ammonium catalysts (TBAPW11Zn and ODAPW11Zn) showed higher catalytic desulfurization efficiency than the ionic liquid catalyst (BMIPW11Zn). The TBAPW11Zn behaved as a homogeneous catalyst immobilized in the extraction solvent, while the ODAPW11Zn with the long carbon chain behaved as a heterogeneous catalyst capable to be recovered from the system. Both quaternary ammonium catalysts showed to be successfully reused/recycled for various consecutive desulfurization cycles.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.doi10.1016/j.fuel.2015.10.095pt_PT
dc.identifier.urihttp://hdl.handle.net/10400.22/9206
dc.language.isoengpt_PT
dc.publisherElsevierpt_PT
dc.relation.ispartofseriesFuel;Vol. 166
dc.relation.publisherversionhttp://www.sciencedirect.com/science/article/pii/S0016236115011096pt_PT
dc.subjectOxidative/extractive desulfurizationpt_PT
dc.subjectZinc substituted polyoxometalatespt_PT
dc.subjectHybrid polyoxometalatespt_PT
dc.subjectReal dieselpt_PT
dc.titleCatalytic oxidative/extractive desulfurization of model and untreated diesel using hybrid based zinc-substituted polyoxometalatespt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage275pt_PT
oaire.citation.startPage268pt_PT
oaire.citation.titleFuelpt_PT
oaire.citation.volume166pt_PT
person.familyNameDomingues
person.givenNameValentina Maria Fernandes
person.identifier.ciencia-id4E16-791D-6664
person.identifier.orcid0000-0003-3472-849X
rcaap.rightsclosedAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublicationbe653ab6-34ec-4329-972a-eee990a7ec66
relation.isAuthorOfPublication.latestForDiscoverybe653ab6-34ec-4329-972a-eee990a7ec66

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