A new solid base catalyst for the transesterification of rapeseed oil to biodiesel with methanol
A new solid base catalyst for the transesterification of rapeseed oil to biodiesel with methanol
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DOI：
10.1016/j.fuel.2012.08.034
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发表时间：
2013-02
期刊：
影响因子：
7.4
通讯作者：
Boyang Wang;Shu-fen Li;Songjiang Tian;R. Feng;Yonglu Meng
中科院分区：
文献类型：
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作者：
Boyang Wang;Shu-fen Li;Songjiang Tian;R. Feng;Yonglu Meng
采用化学合成法制备了一种含Ca12Al14O33和CaO的新型固体碱催化剂，并将其用于菜籽油与甲醇的酯交换反应制备生物柴油。采用Hammett指示剂、X射线衍射（XRD）、红外光谱（IR）、比表面积（BET）和扫描电子显微镜（SEM）对催化剂进行了表征。考察了各种因素对反应的影响，优化了反应条件。结果表明，在醇油摩尔比为15：1、催化剂用量为6wt.%、反应温度为65°C、反应时间为3h的条件下，ME（甲酯）含量可达90搅拌速度为270rpm。该催化剂具有较高的稳定性，可重复使用7次以上，ME含量在87%以上。特别地，这种固体碱催化剂可以有效且容易地从反应体系中分离，因为它不溶于甲醇和甲酯，这可以为开发用于合成生物柴油的环境友好且连续的方法提供显著的益处。
A new solid base catalyst containing Ca12Al14O33and CaO was prepared by chemical synthesis method and was used in the transesterification of rapeseed oil with methanol to produce biodiesel. The catalyst was characterized by Hammett indicators, X-ray diffraction (XRD), infrared spectroscopy (IR), Brunauer–Emmett–Teller (BET) and scanning electron microscopy (SEM), separately. The effect of various factors was investigated to optimize the reaction conditions. The results showed that the ME (methyl ester) content reached 90% after reacting for 3h at 65°C, with a methanol/oil molar ratio of 15:1, the amount of catalyst of 6wt.% and the stirring rate of 270rpm. Moreover, the catalyst could be used repeatedly for at least 7 cycles with the ME content over 87%, due to its high stability. In particular, this solid base catalyst can be separated from reaction system effectively and easily, as it is insoluble in both methanol and methyl esters, which may provide significant benefits for developing an environmentally benign and continuous process for synthesizing biodiesel.