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dc.creatorMarinković, Dalibor
dc.creatorAvramović, Jelena M.
dc.creatorStanković, Miroslav
dc.creatorStamenković, Olivera
dc.creatorJovanović, Dušan M.
dc.creatorVeljković, Vlada B.
dc.date.accessioned2019-01-30T17:56:37Z
dc.date.available2019-01-30T17:56:37Z
dc.date.issued2017
dc.identifier.issn0196-8904
dc.identifier.urihttp://cer.ihtm.bg.ac.rs/handle/123456789/2255
dc.description.abstractLoading CaO onto spherically-shaped gamma-Al2O3 support was applied for the preparation of a cost-effective and environmentally-friendly heterogeneous catalyst for biodiesel production. Physico-chemical, textural and morphological characterization was performed using optical emission spectroscopy (ICP OES), Hg-porosimetry, N-2 physisorption, scanning electron microscopy (FESEM), X-ray diffraction (XRPD), Fourier transform infrared spectroscopy (ATR FTIR) and Hammett indicators. The effects of catalyst preparation conditions (different precursor salts and calcination temperatures) on the catalyst activity, and the reaction conditions (methanol-to-oil molar ratio and catalyst loading) on the reaction rate and esters yield were studied. In addition, catalyst stability was investigated. The most active catalyst was derived from the nitrate precursor after calcination at 475 degrees C (inert atmosphere). Under mild reaction conditions (60 degrees C, 5 h, 900 rpm, methanol-to-oil molar ratio of 12:1 and catalyst loading (CaO wt% to the oil) of 0.5%), the equilibrium ester content of 94.3% was obtained in the methanolysis of sunflower oil in a batch reactor. The catalyst remained sufficiently active in two consecutive cycles without any pretreatment. Mechanical erosion caused by stirring and massive deposition of organic molecules from the reaction mixture caused the decrease of catalytic activity while CaO leaching was negligible.en
dc.publisherPergamon-Elsevier Science Ltd, Oxford
dc.relationinfo:eu-repo/grantAgreement/MESTD/Integrated and Interdisciplinary Research (IIR or III)/45001/RS//
dc.rightsrestrictedAccess
dc.sourceEnergy Conversion and Management
dc.subjectBiodieselen
dc.subjectCaO-based catalysten
dc.subjectCaO/gamma-Al2O3en
dc.subjectCatalyst stabilityen
dc.subjectHeterogeneous catalysten
dc.subjectTransesterificationen
dc.titleSynthesis and characterization of spherically-shaped CaO/gamma-Al2O3 catalyst and its application in biodiesel productionen
dc.typearticle
dc.rights.licenseARR
dcterms.abstractAврамовиц, Јелена М.; Вељковиц, Влада Б.; Станковић, Мирослав; Стаменковиц, Оливера С.; Јовановиц, Дусан М.; Маринковић, Далибор;
dc.citation.volume144
dc.citation.spage399
dc.citation.epage413
dc.citation.other144: 399-413
dc.citation.rankaM21
dc.identifier.doi10.1016/j.enconman.2017.04.079
dc.identifier.rcubConv_3739
dc.identifier.scopus2-s2.0-85018976903
dc.identifier.wos000403031600034
dc.type.versionpublishedVersion


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