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Large-pore silica spheres as support for samarium-coordinated undecamolybdophosphate: Oxidative desulfurization of diesels

2020-01-01Journal article Restricted access
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dc.contributor.authorMirante, Fátima
dc.contributor.authorAlves, Ana C.
dc.contributor.authorJulião, Diana
dc.contributor.authorAlmeida, Pedro L.
dc.contributor.authorGago, S.
dc.contributor.authorValença, Rita
dc.contributor.authorRibeiro, Jorge
dc.contributor.authorDe Castro, Baltazar
dc.contributor.authorGranadeiro, Carlos
dc.contributor.authorBalula, Salete
dc.date.accessioned2020-01-21T14:58:30Z
dc.date.available2020-01-21T14:58:30Z
dc.date.issued2020-01-01
dc.description.abstractA novel composite has been prepared through the immobilization of the Keggin sandwich-type [Sm (PMo11O39)(2)](11-) anion (SmPOM) on large-pore silica spheres previously functionalized with trimethylammonium groups (TMA). The resulting SmPOM@TMA-LPMS material has been evaluated as heterogeneous catalyst in a biphasic desulfurization 1:1 diesel/extraction solvent system using H2O2 as oxidant. Preliminary experiments were conducted with different extraction solvents, acetonitrile and [BMIM]PF6 ionic liquid. The optimized extractive and catalytic oxidative desulfurization system (ECODS) with [BMIM]PF6 was able to reach complete sulfur removal from a model diesel containing 2100 ppm S in just 60 min (10 min of initial extraction + 50 min of catalytic step). The reutilization of catalyst and extraction phase has been successfully performed without loss of desulfurization efficiency in consecutive cycles, turning the process more sustainable and cog-effective. The remarkable results with simulated diesel have motivated the application of the catalyst in the desulfurization of untreated real diesel and 74% of efficiency was achieved after only 2 h for three consecutive cycles.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationMIRANTE, Fátima; [et al] – Large-pore silica spheres as support for samarium-coordinated undecamolybdophosphate: Oxidative desulfurization of diesels. Fuel. ISSN 0016-2361. Vol. 259 (2020), pp. 1-9pt_PT
dc.identifier.doi10.1016/j.fuel.2019.116213pt_PT
dc.identifier.issn0016-2361
dc.identifier.urihttp://hdl.handle.net/10400.21/11015
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherElsevierpt_PT
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dc.relationPOCI-01-0145-FEDER-007688 - FCTpt_PT
dc.relationSFRH/BD/102783/2014 - FCTpt_PT
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dc.subjectPolyoxometalatespt_PT
dc.subjectOxidative desulfurizationpt_PT
dc.subjectHeterogeneous catalysispt_PT
dc.subjectDieselpt_PT
dc.titleLarge-pore silica spheres as support for samarium-coordinated undecamolybdophosphate: Oxidative desulfurization of dieselspt_PT
dc.typejournal article
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oaire.citation.endPage9pt_PT
oaire.citation.startPage1pt_PT
oaire.citation.titleFuelpt_PT
oaire.citation.volume259pt_PT
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project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsclosedAccesspt_PT
rcaap.typearticlept_PT
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