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  • glymes as new solvents for lipase activation and biodiesel preparation

    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1390/01/01
    • تاریخ انتشار در تی پی بین: 1390/01/01
    • تعداد بازدید: 527
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
     glymes (i.e. glycol diethers) were explored as alternative benign solvents for enzymatic reactions, specifically the lipase-catalyzed transesterification. long-chain glymes were found highly compatible with immobilized candida antarctica lipase b (icalb), leading to higher enzyme activities and stabilities than t-butanol and ionic liquids (e.g. the rate of transesterification in diethylene glycol dibutyl ether (g2-bu) was 77% higher than that int-butanol). furthermore, soybean oil was found fully miscible with glymes, which enabled a homogeneous reaction mixture for the enzymatic preparation of biodiesel. in the presence of glymes, calb showed a very high tolerance to high methanol concentrations (up to 60–70% v/v), and nearly stoichiometric triglyceride conversions could be obtained under mild reaction conditions. a laboratory scale-up achieved a high conversion of soybean oil (95.5%). this study suggests that glymes can be environmentally friendly and inexpensive solvents for lipase-catalyzed reactions, such as the enzymatic preparation of biodiesel.

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