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Parameter optimization of the transesterification reaction for the production of ethyl ester biodiesel.

机译：用于酯乙酯生物柴油生产的酯交换反应的参数优化。

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Three parameters important to the transesterification reaction of soy waste cooking oil to ethyl esters were optimized: molar ethanol concentration, weight fraction of the potassium hydroxide catalyst, and reaction temperature. In the course of optimizing the parameters, applicable analytical techniques which quantify the free fatty acid and water content of waste cooking oils and the components of the reaction mixture with minimal manipulation were developed and verified.; The acid number and the water content of the waste cooking oil were determined to be as 3.61 +/- 0.06 and 0.018 vol%, respectively. Hence, the pretreatment of waste cooking oil was not explored. The optimal conditions for the production of ethyl esters from waste cooking oil were identified to be: 145 mol% excess ethanol based on stoichiometric requirements, 1.3 wt% potassium hydroxide based on the waste cooking oil used, and a reaction temperature of 27°C. Using these optimized parameters, the mass-based ethyl ester yield was found to be 85.6%.
机译：优化了对大豆废食用油向酯进行酯交换反应的三个重要参数：乙醇摩尔浓度，氢氧化钾催化剂的重量分数和反应温度。在优化参数的过程中，开发并验证了适用的分析技术，该技术可通过最少的操作量化废烹饪油中的游离脂肪酸和水含量以及反应混合物的成分。废食用油的酸值和水含量分别确定为3.61 +/- 0.06和0.018vol％。因此，没有探索废弃食用油的预处理。由废食用油制备乙酯的最佳条件被确定为：基于化学计量要求为过量145摩尔％的乙醇，基于所用的食用食用油为1.3重量％的氢氧化钾，反应温度为27℃。使用这些优化的参数，发现基于质量的乙酯产率为85.6％。

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