麸皮
酯交换
化学
食品科学
甲醇
米糠油
生物柴油
生物柴油生产
脂肪酸甲酯
催化作用
原位
脂肪酸
有机化学
原材料
作者
Pei-Jing Shiu,Setiyo Gunawan,Wen-Hao Hsieh,Novy S. Kasim,Yi‐Hsu Ju
标识
DOI:10.1016/j.biortech.2009.09.011
摘要
The production of fatty acid methyl esters (FAMEs) by a two-step in-situ transesterification from two kinds of rice bran was investigated in this study. The method included an in-situ acid-catalyzed esterification followed by an in-situ base-catalyzed transesterification. Free fatty acids (FFAs) level was reduced to less than 1% for both rice bran A (initial FFAs content = 3%) and rice bran B (initial FFAs content = 30%) in the first step under the following conditions: 10 g rice bran, methanol to rice bran ratio 15 mL/g, H2SO4 to rice bran mass ratio 0.18, 60 °C reaction temperature, 600 rpm stirring rate, 15 min reaction time. The organic phase of the first step product was collected and subjected to a second step reaction by adding 8 mL of 5 N NaOH solution and allowing to react for 60 and 30 min for rice bran A and rice bran B, respectively. FAMEs yields of 96.8% and 97.4% were obtained for rice bran A and rice bran B, respectively, after this two-step in-situ reaction.
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