School of Chemistry and Chemical Engineering, Henan University of Technology, Zhengzhou 450052, PR China.
Bioresour Technol. 2011 Oct;102(20):9818-22. doi: 10.1016/j.biortech.2011.08.001. Epub 2011 Aug 9.
The transesterification of soybean oil with methanol was carried out, to produce biodiesel, over silica-bonded N-propyl sulfamic acid in a heterogeneous manner. Results showed that a maximum conversion of 90.5% was achieved using a 1:20 M ratio of soybean oil to methanol and a catalyst amount of 7.5 wt.% at 423 K for 60 h. It was found that the free fatty acid (FFA) and water present in the feedstock had no significant influence on the catalytic activity to the transesterification reaction. Besides, the catalyst also showed activities towards the esterification reaction of FFAs, in terms of the FFA conversion of 95.6% at 423 K for 30 h. Furthermore, the catalyst could be recovered with a better reusability.
大豆油与甲醇进行酯交换反应，生成生物柴油，在非均相条件下使用键合 N-丙基磺酸的二氧化硅作为催化剂。结果表明，在 423 K 下，当甲醇与大豆油的摩尔比为 1:20，催化剂用量为 7.5wt.%时，反应 60 h 可达到最大转化率 90.5%。发现原料中的游离脂肪酸（FFA）和水对酯交换反应的催化活性没有显著影响。此外，该催化剂对 FFAs 的酯化反应也具有活性，在 423 K 下反应 30 h 时，FFA 的转化率达到 95.6%。此外，该催化剂具有较好的可回收性。
