کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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70007 | 48805 | 2013 | 6 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Optimization and kinetic study on the synthesis of palm oil ester using Lipozyme TL IM Optimization and kinetic study on the synthesis of palm oil ester using Lipozyme TL IM](/preview/png/70007.png)
Enzymatic synthesis of palm oil esters (POE) was carried out via alcoholysis of palm oil (PO) and oleyl alcohol (OA) catalyzed by Lipozyme TL IM. The optimum reaction conditions were: temperature: 60 °C; enzyme load: 24.7 wt%; substrate ratio: 1:3 (PO/OA), impeller speed: 275 rpm and reaction time: 3 h. At the optimum condition, the conversion of POE was 79.54%. Reusability study showed that Lipozyme TL IM could be used for 5 cycles with conversion above 50%. The alcoholysis reaction kinetic follows the Ping-Pong Bi-Bi mechanism characterized by the Vmax, Km(PO), and Km(OA) values of 32.7 mmol/min, 0.3147 mmol/ml and 0.9483 mmol/ml, respectively. The relationship between initial reaction rate and temperature was also established based on the Arrhenius law.
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► The production of palm oil ester using Lipozyme TL IM was optimized.
► Effect of substrate molar ratio to reaction rate was examined.
► Ping Pong Bi Bi mechanism was proposed and validated.
► Effect of reaction temperature to reaction rate was examined.
► Thermodynamic value calculated using the Arrhenius and Van’t Hoff's equation.
Journal: Journal of Molecular Catalysis B: Enzymatic - Volumes 85–86, January 2013, Pages 214–219