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dc.creatorDokic, Marko
dc.creatorKesic, Zeljka
dc.creatorKrstić, Jugoslav
dc.creatorJovanović, Dušan M.
dc.creatorSkala, Dejan
dc.date.accessioned2019-01-30T17:29:13Z
dc.date.available2019-01-30T17:29:13Z
dc.date.issued2012
dc.identifier.issn0016-2361
dc.identifier.urihttp://cer.ihtm.bg.ac.rs/handle/123456789/949
dc.description.abstractA difficulty of biodiesel synthesis based on alkaline catalysts obviously exists if free fatty acids (FFAs) content in vegetable oil is above 0.5 wt.%. In this study, the ferric sulfate supported on silica (Fe-2(SO4)(3)/SiO2) was synthesized, activated (at different temperature: 120-600 degrees C) and tested for heterogeneous esterification of FFA (oleic acid) present in sunflower oil (5 wt.%). The catalyst samples were characterized by BET, TG/DTG, XRD and FTIR analyses. Obtained results showed that catalyst activated at 500 degrees C for 2 h in air atmosphere gave the maximal conversion of oleic acid (similar to 97%). Repeated use of catalyst without additional catalyst treatment or re-activation indicated that catalyst posses desired stability and activity. A pseudo-homogeneous kinetic model was proposed with good agreement between calculated and experimental data.en
dc.publisherElsevier Sci Ltd, Oxford
dc.relationinfo:eu-repo/grantAgreement/MESTD/Integrated and Interdisciplinary Research (IIR or III)/45001/RS//
dc.rightsrestrictedAccess
dc.sourceFuel
dc.subjectFree fatty acidsen
dc.subjectBiodieselen
dc.subjectEsterificationen
dc.subjectKineticsen
dc.subjectHeterogeneous catalysisen
dc.titleDecrease of free fatty acid content in vegetable oil using silica supported ferric sulfate catalysten
dc.typearticle
dc.rights.licenseARR
dcterms.abstractСкала, Дејан; Јовановиц, Дусан; Докиц, Марко; Кесиц, Зељка; Крстић, Југослав;
dc.citation.volume97
dc.citation.spage595
dc.citation.epage602
dc.citation.other97: 595-602
dc.citation.rankaM21
dc.identifier.doi10.1016/j.fuel.2012.03.039
dc.identifier.rcubConv_2798
dc.identifier.scopus2-s2.0-84861193031
dc.identifier.wos000303979400065
dc.type.versionpublishedVersion


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