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Biodiesel glycerin valorization into oxygenated fuel additives

2021-05Journal article Open access
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dc.contributor.authorSoares Dias, A. P.
dc.contributor.authorFonseca, Frederico G.
dc.contributor.authorCatarino, Mónica
dc.contributor.authorGomes, João
dc.date.accessioned2021-05-27T15:26:01Z
dc.date.available2021-05-27T15:26:01Z
dc.date.issued2021-05
dc.description.abstractrequires costly purification before commercialization. Production of oxygenated fuel additives is a potential route for glycerin valorization. Glycerin acetylation was carried out over heterogeneous acid catalysts (15%, glycerol weight basis) using glacial acetic acid (molar ratio=9). The catalysts, containing different amounts of phosphate species (P/Si from 10 to 20 atomic ratio), were prepared by wet impregnation of commercial silica with aqueous solutions of diammonium phosphate and ortho-phosphoric acid. X-ray diffraction patterns of calcined solids presented amorphous patterns like raw silica. The prepared catalysts presented, at 120 degrees C, glycerol conversion higher than 89.5% after 1 h of reaction, been diacetin the major product, with triacetin selectivities lower than 26.1%. Diacetin selectivity was found to be almost invariant with catalyst acidity thus underlining the relevance of catalyst porosity due to the large acetins molecules sizes. The slow rate of triacetin diffusion in narrow pores of catalyst might be responsible for the relatively low yield obtained. Surface phosphate species showed a slow rate of leaching in the reaction medium showing high catalyst stability.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationDIAS, Ana Paula Soares; [et al] – Biodiesel glycerin valorization into oxygenated fuel additives. Catalysis Letters. ISSN 1011-372X. Vol. 152 (2021), pp. 513-522.pt_PT
dc.identifier.doi10.1007/s10562-021-03646-0pt_PT
dc.identifier.eissn1572-879X
dc.identifier.issn1011-372X
dc.identifier.urihttp://hdl.handle.net/10400.21/13390
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherSpringerpt_PT
dc.relationPTDC/EMS-ENE/4865/2014 - FCTpt_PT
dc.relation.publisherversionhttps://link.springer.com/content/pdf/10.1007/s10562-021-03646-0.pdfpt_PT
dc.subjectBiodieselpt_PT
dc.subjectCatalysispt_PT
dc.subjectValorizationpt_PT
dc.subjectFuel additivespt_PT
dc.subjectAcetylationpt_PT
dc.subjectAcetinspt_PT
dc.titleBiodiesel glycerin valorization into oxygenated fuel additivespt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage522pt_PT
oaire.citation.startPage513pt_PT
oaire.citation.titleCatalysis Letterspt_PT
oaire.citation.volume152
person.familyNameVieira Soares Pereira Dias
person.familyNameG Fonseca
person.familyNameGomes
person.givenNameAna Paula
person.givenNameFrederico
person.givenNameJoão
person.identifier60203
person.identifier.ciencia-id7711-D804-97B8
person.identifier.ciencia-id0212-E6D6-566C
person.identifier.orcid0000-0002-4585-470X
person.identifier.orcid0000-0003-4739-3609
person.identifier.orcid0000-0003-2579-6669
person.identifier.scopus-author-id57205549495
person.identifier.scopus-author-id56113031900
rcaap.rightsclosedAccesspt_PT
rcaap.typearticlept_PT
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relation.isAuthorOfPublication2cd56295-908c-4b2d-9937-0a1269c000f2
relation.isAuthorOfPublicatione44cd72e-bcbb-4612-a274-60cb1915bc0c
relation.isAuthorOfPublication.latestForDiscoveryafdbb547-91dc-4d89-a52c-8c3e8f38d4f6

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