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Mehanohemijska sinteza CaO·ZnO.K2CO3, katalizatora - karakterizacija i aktivnost u metanolizi suncokretovog ulja

dc.creatorKesić, Željka
dc.creatorLukić, Ivana
dc.creatorZdujić, Miodrag
dc.creatorJovalekić, Čedomir
dc.creatorLiu, Hui
dc.creatorSkala, Dejan
dc.date.accessioned2021-03-10T12:40:42Z
dc.date.available2021-03-10T12:40:42Z
dc.date.issued2015
dc.identifier.issn1451-9372
dc.identifier.urihttp://TechnoRep.tmf.bg.ac.rs/handle/123456789/2921
dc.description.abstractThe goal of this study was to prepare a CaO·ZnO catalyst containing a small amount of K2CO3 and analyze its activity for biodiesel synthesis. The catalyst was prepared using the following procedure: CaO and ZnO (mole ratio of 1:2), water and K2CO3 (in various amounts) were mechanochemically treated and after milling heated at 700°C in air atmosphere for obtaining mixed CaO·ZnO/xK2CO3 oxides (x = 0, 1, 2 and 4 mol of K2CO3 per 10 mol of CaO). All the samples were characterized by X-ray diffraction (XRD), inductively coupled plasma (ICP), X-ray photoelectron spectroscopy (XPS), thermogravimetric analysis (TGA), infrared spectroscopy (FTIR), scanning electron microscopy/ energy-dispersive spectroscopy (SEM/EDS), particle size laser diffraction (PSLD) distribution, solubility measurement of Ca, Zn and K ions in methanol as well as by determination of their alkalinity (Hammett indicator method). Prepared CaO·ZnO/xK2CO3 composite powders were tested as catalysts for methanolysis of sunflower oil at 70 °C using mole ratio of sunflower oil to methanol of 1:10 and with 2 mass% of catalyst based on oil weight. The presence of K2CO3 in prepared samples was found to increase the activity of catalyst, and that such effect is caused by homogeneous-heterogeneous catalysis of biodiesel synthesis.en
dc.description.abstractCilj ovih istraživanja bio je da se pripremi CaO·ZnO katalizator koji sadrži malu količinu K2CO3 i analizira njegova aktivnost u sintezi biodizela. Katalizator je pripremljen prema sledećoj proceduri: CaO i ZnO (molski odnos 1:2), voda i K2CO3 (u različitoj količini) su tretirani mehanohemijski i nakon mlevenja zagrevani na 700 °C u atmosferi vazduha da bi se dobila smeša oksida CaO·ZnO/xK2CO3 (x = 0, 1, 2 i 4 mol K2CO3 na 10 mol CaO). Karakterizacija pripremljenih katalizatora izvršena je metodama rendgenske difrakcije (XRD), indukovane kuplovane plazme (ICP), spektroskopije fotoelektrona dobijenih X-zracima (XPS), termogravimetrijske analize (TGA), infracrvene spektroskopije (FTIR), skenirajuće elektronske mikroskopije i energetske disperzione spektroskopije (SEM/EDS), raspodele veličine čestica (PSLD), merenjem rastvorljivosti katalizatora odnosno Ca, Zn i K jona u metanolu, kao i određivanjem njihove baznosti (metodom Hametovih indikatora). Pripremljeni CaO·ZnO/xK2CO3 kompozitni prahovi testirani su kao katalizatori u reakciji metanolize suncokretovog ulja na 70 °C, pri molarnom odnosu suncokretovog ulja i metanola od 1:10 i sa 2 mas.% katalizatora u odnosu na masu ulja. Pokazano je da prisustvo K2CO3 u pripremljenim uzorcima povećava aktivnost katalizatora i da je takav efekat posledica homogeno-heterogene katalize u sintezi biodizela.sr
dc.publisherAssociation of the Chemical Engineers of Serbia
dc.relationinfo:eu-repo/grantAgreement/MESTD/Integrated and Interdisciplinary Research (IIR or III)/45001/RS//
dc.rightsopenAccess
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/4.0/
dc.sourceChemical Industry & Chemical Engineering Quarterly
dc.subjectmechanochemical synthesisen
dc.subjectCaOen
dc.subjectZnOen
dc.subjectK2CO3en
dc.subjectmixed oxidesen
dc.subjectbiodiesel synthesisen
dc.subjectmehanohemijska sintezasr
dc.subjectCaOsr
dc.subjectZnOsr
dc.subjectK2CO3sr
dc.subjectmešani oksidisr
dc.subjectsinteza biodizelasr
dc.titleMechanochemical synthesis of CaO·ZnO.K2CO3 catalyst: Characterization and activity for methanolysis of sunflower oilen
dc.titleMehanohemijska sinteza CaO·ZnO.K2CO3, katalizatora - karakterizacija i aktivnost u metanolizi suncokretovog uljasr
dc.typearticle
dc.rights.licenseBY-NC-ND
dc.citation.epage12
dc.citation.issue1-1
dc.citation.other21(1-1): 1-12
dc.citation.rankM23
dc.citation.spage1
dc.citation.volume21
dc.identifier.doi10.2298/CICEQ131026041K
dc.identifier.fulltexthttp://TechnoRep.tmf.bg.ac.rs/bitstream/id/972/2918.pdf
dc.identifier.rcubconv_1698
dc.identifier.scopus2-s2.0-84946185788
dc.identifier.wos000354755400001
dc.type.versionpublishedVersion


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