油料种子原位酯交换制备生物柴油的实验研究
发布时间:2018-06-04 08:01
本文选题:生物柴油 + 油料种子 ; 参考:《云南师范大学》2015年硕士论文
【摘要】:随着石化能源储量的减少,发展多元化能源体系已成为世界各国的重要战略之一。生物柴油以其优良的可再生性和环保性而受到广泛关注,传统酯交换法是目前工业化生产生物柴油的主要方法。与传统酯交换法相比,原位酯交换法避免了油脂的提取过程,用含油原料直接与甲醇混合进行酯交换反应制备生物柴油,在整个反应过程中,甲醇一方面剂萃取出原料中的油脂,另一方面作为反应物与萃取出的油脂进行酯交换反应。因此,原位酯交换法是一种高效的生物柴油制备方法。本实验对小桐子、橡胶籽和漆籽仁在浓H2SO4的催化下,进行原位酯交换反应制备生物柴油的实验研究。实验得到小桐子原位酯交换制备生物柴油的最佳反应条件:配比(m仁:m甲醇,下同)为1:12,催化剂的浓度为0.2mol/L,温度为65±2℃,反应时间为15h,该条件下小桐子生物柴油的产率为29.40%;橡胶籽原位酯交换制备生物柴油的最佳反应条件:配比为1:12,催化剂的浓度为0.2mol/L,温度为65±2℃,反应时间为15h,该条件下橡胶籽生物柴油的产率为17.55%;漆籽仁原位酯交换制备生物柴油的最佳反应条件:配比为1:12,催化剂的浓度为0.1mol/L,温度为65±2℃,反应时间为15h,该条件下漆籽仁生物柴油的产率为8.50%。以小桐子为原料,在单因素实验基础上采用响应面分析方法Box-Behnken中心组合实验,考察了上述单因素中影响较大的配比、催化剂浓度和反应时间3个因素及交互作用对产率的影响,固定温度为65±2℃,优化得到的最优实验条件:配比为1:13.77,催化剂的浓度为0.22mol/L,反应时间为18h,在此条件下预测生物柴油的产率为31.16%,在最优条件下进行验证实验,生物柴油的产率为30.57%。因此模型可靠,能为实际生产提供依据和帮助。原位酯交换法制备生物柴油不需要从含油原料中提取油脂,因此降低了过程成本,缩短了工艺,实现了含油原料到生物柴油的一步转化。经实验验证,该方法实用可靠。
[Abstract]:With the decrease of fossil energy reserves, the development of diversified energy systems has become one of the most important strategies in the world. Biodiesel has attracted wide attention for its excellent reproducibility and environmental protection. Traditional transesterification is the main method for the industrial production of biodiesel. Compared with the traditional transesterification method, the in situ transesterification method avoids the process of oil extraction. On the one hand, methanol extracts the oil from raw materials, on the other hand, it acts as a reactant for transesterification with the extracted oil. Therefore, transesterification in situ is an efficient method for the preparation of biodiesel. In this paper, the in situ transesterification of jatropha, rubber seed and lacquer kernels catalyzed by concentrated H2SO4 to prepare biodiesel was studied. The optimum reaction conditions for the preparation of biodiesel by in situ transesterification of jatropha L. were as follows: 1: 12, 0.2mol / L catalyst concentration, 65 卤2 鈩,
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