Ethanolysis of soybean oil was carried out over lime catalyst produced by calcination of scallop shells food wastes. The as prepared catalyst showed XRD lines belonging to lime, whereas post reaction samples presented XRD pattern belonging to Ca(OH)₂ overlaid with lines of calcium diglyceroxide. The catalyst dynamics during ethanolysis was similar to that reported for methanolysis, being hydration and consequent diglyceroxide formation the main transformations of CaO catalyst during reaction. The influence of the reaction parameters, such as ethanol:oil molar ratio (10:1–14:1), catalyst loading (10–15%, based in oil weight) and time reaction (6–10 h), on the FAAE (fatty acids ethyl esters) yield was analyzed by response surface methodology. A polynomial model was fitted using Minitab software, showing a correlation between predicted and experimental FAEE yields of 0.921. The maximum FAEE yield of 99.2% was computed for optimal reaction parameters of 11:1 ethanol:oil molar ratio; 13.8% catalyst loading and 9.1 h of reaction time. The fitted model was verified for the optimal conditions, using three replicas, given 99.0% of FAEE yield instead of the 99.2% predicted.

大豆油的乙醇化反应是通过将扇贝贝壳食品废物煅烧产生的石灰催化剂进行的。所制得的催化剂显示出属于石灰的XRD谱线，而反应后样品呈现出属于Ca（OH）_2的XRD谱图，其被二甘油氧化钙谱线覆盖。乙醇分解过程中的催化剂动力学与甲醇分解过程中报道的动力学相似，是水合和随后形成的甘油二酸酯在反应过程中CaO催化剂的主要转变。反应参数对FAAE的影响，例如乙醇：油的摩尔比（10：1-14：1），催化剂的负载量（基于油重的10-15％）和时间反应（6-10 h） （脂肪酸乙酯）的产率通过响应面法分析。使用Minitab拟合多项式模型软件，显示预测的和实验的FAEE产量为0.921之间的相关性。对于乙醇与油的摩尔比为11：1的最佳反应参数，计算出的最大FAEE产率为99.2％。催化剂负载量为13.8％，反应时间为9.1小时。使用三个副本验证拟合模型的最佳条件，给出99.0％的FAEE产量，而不是预测的99.2％。