Van Gerpen Jon
Department of Biological and Agricultural Engineering, University of Idaho, Moscow, ID, USA.
Methods Mol Biol. 2009;581:281-90. doi: 10.1007/978-1-60761-214-8_18.
Biodiesel is produced by reacting vegetable oils or animal fats with alcohol in the presence of an alkaline catalyst. The resulting methyl esters, which are the biodiesel fuel, are separated from the by-product glycerin, and then washed with water and dehydrated to produce fuel that must meet standardized specifications. Degraded oils containing high levels of free fatty acids can also be converted to biodiesel, but pretreatment with acid-catalyzed esterification is required. The resulting fuel is suitable for use as a neat fuel in diesel engines or blended with conventional diesel fuel.
生物柴油是通过在碱性催化剂存在的情况下，使植物油或动物脂肪与醇发生反应而生产的。所得的甲酯，即生物柴油燃料，与副产物甘油分离，然后用水洗涤并脱水，以生产出必须符合标准化规格的燃料。含有高含量游离脂肪酸的废油也可以转化为生物柴油，但需要用酸催化酯化进行预处理。所得燃料适合作为纯燃料用于柴油发动机，或与传统柴油燃料混合使用。
