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Decrease of free fatty acid content in vegetable oil using silica supported ferric sulfate catalyst
dc.creator | Dokic, Marko | |
dc.creator | Kesic, Zeljka | |
dc.creator | Krstić, Jugoslav | |
dc.creator | Jovanović, Dušan M. | |
dc.creator | Skala, Dejan | |
dc.date.accessioned | 2019-01-30T17:29:13Z | |
dc.date.available | 2019-01-30T17:29:13Z | |
dc.date.issued | 2012 | |
dc.identifier.issn | 0016-2361 | |
dc.identifier.uri | https://cer.ihtm.bg.ac.rs/handle/123456789/949 | |
dc.description.abstract | A 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.publisher | Elsevier Sci Ltd, Oxford | |
dc.relation | info:eu-repo/grantAgreement/MESTD/Integrated and Interdisciplinary Research (IIR or III)/45001/RS// | |
dc.rights | restrictedAccess | |
dc.source | Fuel | |
dc.subject | Free fatty acids | en |
dc.subject | Biodiesel | en |
dc.subject | Esterification | en |
dc.subject | Kinetics | en |
dc.subject | Heterogeneous catalysis | en |
dc.title | Decrease of free fatty acid content in vegetable oil using silica supported ferric sulfate catalyst | en |
dc.type | article | |
dc.rights.license | ARR | |
dcterms.abstract | Скала, Дејан; Јовановиц, Дусан; Докиц, Марко; Кесиц, Зељка; Крстић, Југослав; | |
dc.citation.volume | 97 | |
dc.citation.spage | 595 | |
dc.citation.epage | 602 | |
dc.citation.other | 97: 595-602 | |
dc.citation.rank | aM21 | |
dc.identifier.doi | 10.1016/j.fuel.2012.03.039 | |
dc.identifier.scopus | 2-s2.0-84861193031 | |
dc.identifier.wos | 000303979400065 | |
dc.type.version | publishedVersion |