Kusdiana Dadan, Saka Shiro
Graduate School of Energy Science, Kyoto University, Yoshida-honmachi, Sakyo-ku, Kyoto, 606-8501, Japan.
Appl Biochem Biotechnol. 2004 Spring;113-116:781-91. doi: 10.1385/abab:115:1-3:0781.
Biodiesel fuel was prepared by a two-step reaction: hydrolysis and methyl esterification. Hydrolysis was carried out at a subcritical state of water to obtain fatty acids from triglycerides of rapeseed oil, while the methyl esterification of the hydrolyzed products of triglycerides was treated near the supercritical methanol condition to achieve fatty acid methyl esters. Consequently, the two-step preparation was found to convert rapeseed oil to fatty acid methyl esters in considerably shorter reaction time and milder reaction condition than the direct supercritical methanol treatment. The optimum reaction condition in this two-step preparation was 270 degrees C and 20 min for hydrolysis and methyl esterification, respectively. Variables affecting the yields in hydrolysis and methyl esterification are discussed.
水解和甲酯化。水解在水的亚临界状态下进行，从菜籽油的甘油三酯中获得脂肪酸，而甘油三酯水解产物的甲酯化在接近超临界甲醇的条件下进行，以得到脂肪酸甲酯。因此，发现与直接超临界甲醇处理相比，两步法制备能在相当短的反应时间和更温和的反应条件下将菜籽油转化为脂肪酸甲酯。该两步法制备中的最佳反应条件分别为水解270℃、20分钟，甲酯化270℃、20分钟。讨论了影响水解和甲酯化产率的变量。
