Production of high quality biodiesel from waste acid oil obtained during edible oil refining using ion-exchange resin catalysts
Production of high quality biodiesel from waste acid oil obtained during edible oil refining using ion-exchange resin catalysts
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DOI：
10.1016/j.fuel.2014.08.024
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发表时间：
2015
期刊：
影响因子：
7.4
通讯作者：
N. Shibasaki-Kitakawa;K. Hiromori;Toru Ihara;K. Nakashima;T. Yonemoto
中科院分区：
文献类型：
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作者：
N. Shibasaki-Kitakawa;K. Hiromori;Toru Ihara;K. Nakashima;T. Yonemoto
以游离脂肪酸（FFA）含量大于95wt%的废酸油为原料，连续生产完全符合国际标准的高品质生物柴油。首先讨论了水对阳离子交换树脂催化FFA酯化反应的影响。然后，提出了一种简单的方法，用于预处理树脂，而不干燥，仅供应1.5cm3/g（湿树脂）的醇。其次，确定了游离脂肪酸连续酯化制备生物柴油的工艺条件。在醇与脂肪酸残基的摩尔比为2：1和足够的停留时间下实现FFA的完全转化。随后用阴离子交换树脂催化剂进行油中甘油三酯的酯交换反应是生产高质量生物柴油所必需的。酸性油的生物柴油产率比富油酸油的生物柴油产率高8.5倍。这一过程证明了一个商业上可行的路线，以高品质的生物柴油。
This study was aimed at the continuous production of high quality biodiesel fuel, which fully satisfies international specifications, from waste acid oil with free fatty acids (FFA) content of >95 wt%. First, the effect of water on the esterification of FFA with the cation-exchange resin catalyst was discussed. Then, a simple method for pretreating the resin without drying, only supplying alcohol of 1.5 cm3/g (wet resin), was proposed. Second, the operating conditions for the continuous esterification of FFA to biodiesel were established. The complete conversion of FFA was achieved at the mole ratio of alcohol:fatty acid residue of 2:1 and sufficient residence time. Subsequent processing with an anion-exchange resin catalyst for the transesterification of triglycerides in the oil was necessary to produce high quality biodiesel. The biodiesel productivity with acid oil was about 8.5 times higher than that with triglyceride-rich oil. This process demonstrated a commercially feasible route to high quality biodiesel.