کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7826303 | 1503035 | 2018 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Transesterification of triolein with ethanol using lipase-entrapped NIPA-co-PEGMEA gel beads
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آلی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Monodisperse, millimeter-sized, lipase-entrapped NIPA-co-PEGMEA (N-isopropylacrylamide-co-poly(ethylene glycol) methyl ether acrylate) gel beads were prepared by sedimentation polymerization. The feasibility of the lipase-entrapped gel for use in biodiesel fuel (BDF) production was evaluated by studying its catalytic performance in transesterification of triolein with ethanol as the model. The reaction rate was expressed by the ping-pong bi-bi mechanism with ethanol inhibition; the parameters for the immobilized lipase were as follows; the maximum reaction rate, Vmax, was 0.405â¯mol/(minâ¯kgâ¯ââ¯Lipase PS); the Michaelis constants for triolein and ethanol, Km,T and Km,EtOH, were 481 and 1770â¯mol/m3, respectively; the ethanol inhibition constant, Ki, was 394â¯mol/m3. The NIPA-co-PEGMEA gel support improved the stability of the immobilized lipase. We developed a water-washing process wherein the by-product glycerol, which is absorbed and accumulated in the NIPA-co-PEGMEA gel, is removed, so that the lipase-entrapped gel could be reused for multiple cycles (10â¯cycles were confirmed). The glycerol absorbability of the NIPA-co-PEGMEA gel makes it promising for use in facile BDF production, as it allows for the simultaneous enzymatic reaction and glycerol removal.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Reactive and Functional Polymers - Volume 126, May 2018, Pages 83-86
Journal: Reactive and Functional Polymers - Volume 126, May 2018, Pages 83-86
نویسندگان
Hideaki Tokuyama, Ayaka Naito, Gakuto Kato,