Key Laboratory of Safety Science of Pressurized System (MOE), School of Mechanical Engineering, East China University of Science and Technology, Shanghai 200237, China.
Bioresour Technol. 2010 Dec;101(24):9570-6. doi: 10.1016/j.biortech.2010.07.066. Epub 2010 Aug 8.
Mixed oxides of TiO(2)-MgO obtained by the sol-gel method were used to convert waste cooking oil into biodiesel. Titanium improved the stability of the catalyst because of the defects induced by the substitution of Ti ions for Mg ions in the magnesia lattice. The best catalyst was determined to be MT-1-923, which is comprised of an Mg/Ti molar ratio of 1 and calcined at 923 K, based on an assessment of the activity and stability of the catalyst. The main reaction parameters, including methanol/oil molar ratio, catalyst amount, and temperature, were investigated. The catalytic activity of MT-1-923 decreased slowly in the reuse process. After regeneration, the activity of MT-1-923 slightly increased compared with that of the fresh catalyst due to an increase in the specific surface area and average pore diameter. The mixed oxides catalyst, TiO(2)-MgO, showed good potential in large-scale biodiesel production from waste cooking oil.
采用溶胶-凝胶法制备的 TiO(2)-MgO 复合氧化物被用于将废食用油转化为生物柴油。钛的取代作用会在氧化镁晶格中产生缺陷，从而提高了催化剂的稳定性。根据对催化剂活性和稳定性的评估，确定最佳催化剂为 MT-1-923，它由 Mg/Ti 摩尔比为 1 和在 923 K 下煅烧而成。考察了甲醇/油摩尔比、催化剂用量和温度等主要反应参数。MT-1-923 在重复使用过程中的催化活性下降缓慢。再生后，由于比表面积和平均孔径的增加，MT-1-923 的活性略高于新鲜催化剂。TiO(2)-MgO 复合氧化物催化剂在大规模废食用油生产生物柴油方面具有良好的潜力。
