Enzymatic production of biodiesel from cotton seed oil using t-butanol as a solvent

被引:367
|
作者
Royon, D. [1 ]
Daz, M. [1 ]
Ellenrieder, G. [1 ]
Locatelli, S. [1 ]
机构
[1] Univ Nacl Salta, CONICET, INIQUI, RA-4400 Salta, Argentina
关键词
biodiesel; lipase; t-butanol; novozym; 435; methanol; cotton seed oil;
D O I
10.1016/j.biortech.2006.02.021
中图分类号
S2 [农业工程];
学科分类号
0828 ;
摘要
The enzymatic production of biodiesel by methanolysis of cottonseed oil was studied using immobilized Candida antaretica lipase as catalyst in t-butanol solvent. Methyl ester production and triacylglycerol disappearance were followed by HPLC chromatography. It was found, using a batch system, that enzyme inhibition caused by undissolved methanol was eliminated by adding t-butanol to the reaction medium, which also gave a noticeable increase of reaction rate and ester yield. The effect of t-butanol, methanol concentration and temperature on this system was determined. A methanolysis yield of 97% was observed after 24 h at 50 degrees C with a reaction mixture containing 32.5% t-butanol, 13.5% methanol, 54% oil and 0.017 g enzyme (g oil)(-1). With the same mixture, a 95% ester yield was obtained using a one step fixed bed continuous reactor with a flow rate of 9.6 ml h(-1) (g enzyme)(-1). Experiments with the continuous reactor over 500 h did not show any appreciable decrease in ester yields. (c) 2006 Elsevier Ltd. All rights reserved.
引用
收藏
页码:648 / 653
页数:6
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