Enhancement of Pretreatment Process for Biodiesel Production from Jatropha Oil Having High Content of Free Fatty Acids
Enhancement of Pretreatment Process for Biodiesel Production from Jatropha Oil Having High Content of Free Fatty Acids
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发表时间：
2014
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通讯作者：
T. Jayasinghe;Paweetida Sungwornpatansakul;K. Yoshikawa
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作者：
T. Jayasinghe;Paweetida Sungwornpatansakul;K. Yoshikawa
生物柴油是一种可再生能源，可以避免对石油燃料的依赖。主要的挑战是降低由于原材料和能源消耗而导致的高BDF生产成本。本研究采用机械混合法和乳化混合法两种不同的混合方法进行酯化反应，降低麻疯树油中游离脂肪酸（FFA）的含量。以98%硫酸（H2SO4）为催化剂，研究了麻疯树油中游离脂肪酸转化为甲酯的工艺。本研究的主要目的是建立一种合理的混合方法，减少甲醇的摄入量和能量的消耗。结果表明：采用乳化混合法，在60℃条件下，使用1% w/w的硫酸，甲醇与油的摩尔比为0.8:1，麻疯树油的酸值可由9.3 mgKOH/1g油降至2 mgKOH/1g油以下；而机械混合法需要1.25% w/w的H2SO4酸，甲醇与油的摩尔比为0.9:1，搅拌速度为600转/分，温度为60℃。试验结果表明乳化混合法是一种很有前途的替代机械混合法的酯化反应混合方法。
Biodiesel fuel (BDF) is derived from renewable resources and it is possible to avoid the dependence on petroleum fuel. The main challenge is to reduce the high BDF production cost resulting from the consumption of raw material and energy. In this study, two different mixing methods, namely the mechanical mixing method and the emulsification mixing method, were used for the esterification reaction to reduce the free fatty acid (FFA) contents in the Jatropha curcas oil. The conversion of FFA in Jatropha curcas oil to methyl esters was carried out using 98% Sulfuric (H2SO4) acid as a catalyst. The main objective of this study is to establish a proper mixing method that reduces the consumption of methanol intake and energy. The results showed that by using the emulsification mixing method, the acid value of Jatropha oil could be reduced from 9.3 mgKOH/1g oil to less than 2 mgKOH/1g oil using 1% w/w of H2SO4 acid with the molar ratio of methanol to oil of 0.8:1 at the temperature of 60 0 C, whereas the mechanical mixing method required 1.25% w/w of H2SO4 acid with the methanol to oil molar ratio of 0.9:1 and stiring speed of 600 rpm at the temperature of 60 0 C. The test results revealed that the emulsification mixing method is a promising alternative mixing method to the mechanical mixing method for the esterification reaction.