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The synthesis of CaO loaded onto Al2O3 from calcium acetate and its application in transesterification of the sunflower oil

Sinteza CaO nanešenog na Al2O3 od prekursora kalcujum acetata i njegova primena u transesterifikaciji suncokretovog ulja

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2015
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Authors
Marinković, Dalibor
Stanković, Miroslav
Veličković, Ana V.
Avramović, Jelena M.
Cakić, Milorad D.
Veljković, Vlada B.
Article (Published version)
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Abstract
Transesterification of sunflower oil was carried out over CaO loaded onto γ-Al2O3 as heterogeneous base catalysts. The solid base catalysts were syn­thesized by the modified wet impregnation of calcium acetate monohydrate onto neutral γ-Al2O3, calcined at different temperatures in an inert atmosphere and characterized by FESEM, XRPD and FTIR techniques. The catalyst con­taining 5.5 wt. % CaO supported on γ-Al2O3 calcined at 700°C exhibited the highest FAME yield at mild reaction conditions (60°C, atmospheric pressure, methanol-to-oil molar ratio of 9:1 and 0.51% of active species-CaO by weight of oil). The best CaO/γ-Al2O3 catalyst showed a similar or lower catalytic activity than some other CaO-based catalysts at a smaller amount of the catalyst (at least two times less than in other studies).
Transesterifikacija jestivog suncokretovog ulja izvršena je korišćenjem CaO nanešenog na γ-Al2O3 kao heterogenog baznog katalizatora. Katalizator je si-ntetisan korišćenjem modifikovane metode mokre impregnacije gde je kalcijum acetat monohidrat kao precursor nanešen na neutralnu γ-Al2O3. Karakterizacija katalizatora je urađena korišćenjem sledećih metoda: FESEM, XRPD i FTIR. Na katalitičku aktivnost, a samim tim i prinos metil estara masnih kiselina, utiču morfologija i sastav katalizatora pripremljenog kalcinacijom na različitim temperatu­rama. U reakciji transesterifikacije suncokretovog ulja pri umerenim reakcionim uslovima (60°C, molski odnos metanola:ulja 9:1 i količina CaO 0,51% u odnosu na masu ulja) katalitički najaktivniji je katalizator sa 5,5 mas. % CaO nanešenih na nosač i kalcinisan na 700°C. U poređenju sa literaturnim rezultatima drugih katalizatora baziranih na CaO, primenjenim u sličnim reakcionim uslovima CaO/ γ-Al2O3 je pokazao sličnu ili nižu katalitičku aktivnost.... Razlog tome je zato što je u ovom radu korišćena najmanje dva puta manja količina katalizatora po eksperimentu u odnosu na istraživanja sa kojima je vršeno poređenje.

Keywords:
biodiesel / calcium oxide / calcification / gamma alumina / impregnation / transesterification / biodizel / gama alumina / impregnacija / kalcijum oksid / kalcifinacija / transesterifikacija
Source:
Advanced Technologies, 2015, 4, 1, 26-32
Publisher:
  • Tehnološki fakultet, Leskovac
Projects:
  • Nanostructured Functional and Composite Materials in Catalytic and Sorption Processes (RS-45001)

DOI: 10.5937/savteh1501026M

ISSN: 2406-2979

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URI
http://cer.ihtm.bg.ac.rs/handle/123456789/1774
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