Laboratory of Applied Biocatalysis, South China University of Technology, 381 Wushan Street, Guangzhou 510640, PR China.
ChemSusChem. 2012 Aug;5(8):1533-41. doi: 10.1002/cssc.201100811. Epub 2012 Jun 12.
A novel bagasse-based solid acid catalyst was successfully prepared through sulfonation of incompletely carbonized bagasse. A range of conditions for producing the catalyst were investigated, and the optimized catalyst, produced under carbonization at 648 K for 0.5 h and sulfonation at 423 K for 15 h, showed excellent catalytic activity and resulted in around 95 % yield of methyl oleate. Its activity was not only substantially greater than that of niobic acid and Amberlyst-15, but also comparable to or superior to that of catalysts made from pure starch or glucose, respectively. Additionally, the bagasse-derived catalyst could be repeatedly employed for at least eight cycles and still retained around 90 % of its original activity, exhibiting excellent operational stability. Furthermore, the catalyst efficiently converted waste cooking oils with 38.6 wt % free fatty acids into biodiesel and afforded a high yield of about 93.8 % within 12 h. These results clearly show that the bagasse-derived catalyst is economic, eco-friendly, and promising for biodiesel production from low-cost feedstocks and may find wide applications.
一种新型的基于蔗渣的固体酸催化剂通过不完全碳化的蔗渣磺化成功制备。研究了一系列制备催化剂的条件，优化后的催化剂在 648K 碳化 0.5 小时，423K 磺化 15 小时条件下，表现出优异的催化活性，得到了约 95%的油酸甲酯收率。其活性不仅明显大于铌酸和 Amberlyst-15，而且与分别由纯淀粉或葡萄糖制成的催化剂相当或更优。此外，蔗渣衍生的催化剂可重复使用至少 8 个周期，仍然保持约 90%的原始活性，表现出优异的操作稳定性。此外，该催化剂能够有效地将游离脂肪酸含量为 38.6wt%的废食用油转化为生物柴油，在 12 小时内得到约 93.8%的高收率。这些结果清楚地表明，蔗渣衍生的催化剂具有经济、环保和从低成本原料生产生物柴油的潜力，可能有广泛的应用。
