阳离子交换树脂催化油脂副产物制备生物柴油的动力学研究

以棕榈油脱臭馏出物(PODD)和无水甲醇为原料,强酸性阳离子交换树脂为固体酸催化剂,在自制的固定床反应器中进行酯化反应,合成了脂肪酸甲酯(生物柴油)。考察了反应温度、催化反应时间、物料摩尔比对游离脂肪酸转化率的影响。实验结果表明,适宜的反应条件为:反应温度333.15K、催化反应时间56.28min、甲醇与PODD的摩尔比17.25,在此条件下游离脂肪酸转化率为81.66%。同时提出了固定床脂肪酸催化酯化反应的动力学模型,根据实验数据拟合得到动力学参数,酯化反应的活化能为47.761kJ/mol,指数前因子为59.641L/(kmol.min)。该模型能较好地描述固定床脂肪酸催化酯化的反应过程。

Reaction Kinetics of Preparing Biodiesel from By-Products of Palm Oil over Cation Exchange Resin Catalyst

Fatty acid methyl esters(biodiesel) were prepared by catalytic esterification of palm oil deodorizing distillate(PODD) and anhydrous methanol over a cation exchange resin solid acid catalyst in a self-made fixed bed reactor.The effects of reaction temperature,reaction time and mole ratio of methanol to PODD on conversion of the free fatty acids in PODD were studied.Under optimum reaction conditions of temperature 333.15 K,time 56.28 min and mole ratio of methanol to PODD 17.25,the conversion of the free fat...