Center of Excellence for Innovation in Chemistry and Department of Chemistry, Faculty of Science, Mahidol University, Bangkok 10400, Thailand.
Bioresour Technol. 2013 Sep;143:686-90. doi: 10.1016/j.biortech.2013.06.087. Epub 2013 Jun 28.
Calcined bovine bone waste was employed to catalyze the transesterification reaction between soybean oil and methanol. The influence of various conditions on the efficiency of the transesterification was studied i.e. type of reactor, temperature, catalyst loading and methanol/oil ratio. The optimum yield of methyl ester (97%) was obtained by performing the closed-system transesterification at 65 °C for 3 h with catalyst loading of 8% wt and 6:1 methanol to oil ratio, using bone calcined at 750 °C. Calcination of the commercial bovine bone at 650 °C and above results in conversion of the calcium carbonate component to calcium oxide, with the major component being crystalline hydroxyapetite. Calcium oxide is believed to be responsible for the catalytic activity of the material. The reusability, low cost and low catalyst loading required (4% wt) may make bovine bone an attractive alternative to existing transesterification catalyst systems.
采用煅烧牛骨废料作为催化剂，促进大豆油与甲醇的酯交换反应。研究了不同条件对酯交换反应效率的影响，如反应器类型、温度、催化剂用量和醇油比。在 65°C 下进行 3 小时的封闭体系酯交换反应，催化剂用量为 8%wt，甲醇与油的摩尔比为 6:1，采用 750°C 煅烧的牛骨，可获得最高的甲酯收率（97%）。在 650°C 以上对商业牛骨进行煅烧会导致碳酸钙成分转化为氧化钙，主要成分是结晶羟磷灰石。氧化钙被认为是该材料具有催化活性的原因。牛骨具有可重复使用、成本低和所需催化剂用量低（4%wt）等优点，可能成为现有酯交换催化剂体系的一种有吸引力的替代品。
