title: Lipase-mediated transformation of vegetable oils into biodiesel using propan-2-ol as acyl acceptor.
abstract: Propan-2-ol was used as an acyl acceptor for immobilized lipase-catalyzed preparation of biodiesel. The optimum conditions for transesterification of crude jatropha (Jatropha curcas), karanj (Pongamia pinnata) and sunflower (Helianthus annuus) oils were 10% Novozym-435 (immobilized Candida antarctica lipase B) based on oil weight, alcohol to oil molar ratio of 4:1 at 50 degrees C for 8 h. The maximum conversions achieved using propan-2-ol were 92.8, 91.7 and 93.4% from crude jatropha, karanj and sunflower oils, respectively. Reusability of the lipase was maintained over 12 repeated cycles with propan-2-ol while it reached to zero by 7(th) cycle when methanol was used as an acyl acceptor, under standard reaction conditions.
authors.affiliation: Division of Lipid Science and Technology, Indian Institute of Chemical Technology, Hyderabad, India.
authors.forename: Mukesh Kumar
authors.initials: MK
authors.lastname: Modi
authors.forename: J R C
authors.initials: JR
authors.lastname: Reddy
authors.forename: B V S K
authors.initials: BV
authors.lastname: Rao
authors.forename: R B N
authors.initials: RB
authors.lastname: Prasad
mesh_terms: D019840:2-Propanol / Q000378:metabolism; D001709:Biotechnology; D001711:Biotransformation; D004795:Enzyme Stability; D004800:Enzymes, Immobilized; D004951:Esterification; D005656:Fungal Proteins; D005742:Gasoline; D031286:Jatropha; D007700:Kinetics; D008049:Lipase / Q000378:metabolism*; D000432:Methanol / Q000378:metabolism; D010938:Plant Oils / Q000378:metabolism*; D052596:Pongamia; D000074242:Sunflower Oil
chemical_list: D004800:Enzymes, Immobilized; D005656:Fungal Proteins; D005742:Gasoline; D010938:Plant Oils; D000074242:Sunflower Oil; D008049:Lipase; C431349:lipase B, Candida antarctica; D019840:2-Propanol; D000432:Methanol