Biodiesel Synthesis from Nanometer Magnetic Solid Base Catalyst
Nanometer magnetic solid base catalysts were prepared by loading CaO on Fe3O4 with Na2CO3 and NaOH as precipitator, respectively. The optimum conditions for the preparation of this catalyst were investigated. The influence of the proportion of Ca2+to Fe3O4 on the catalytic performance was studied. The catalyst with highest catalytic activity are obtained when the proportion of Ca2+to Fe3O4 is 7:1,and the catalytic activity of the catalyst calcined from Ca(OH)2-Fe3O4 is better than that calcined from CaCO3-Fe3O4. Under the conditions of methanol/oil molar ratio at 15:1, catalyst dosage 2 wt％ and temperature at 70 ℃, the biodiesel yield reached to 95％ in 80 min, even to 99％ finally. The catalytic activity and recovery rate of the nanometer magnetic solid base catalysts are much better than those of CaO. Calcination temperature was determined by differential thermogravimetric analysis. Ca2Fe2O5, a kind of new metal multiple oxide, was found in the catalyst through X-ray diffraction. Finally, these catalysts were characterized by scanning electronic microscope (SEM),transmission electron microscopy (TEM), and vibrating sample magnetometer (VSM).
biodiesel transesterification nanometer magnetic solid base new crystalloid
Peng-mei LV Chang LIU Zhen-hong YUAN Fang YAN Wen LUO
Guangzhou Institute of Energy Conversion, Chinese Academy of sciences Key Laboratory of Renewable En Guangzhou Institute of Energy Conversion, Chinese Academy of sciences Key Laboratory of Renewable En
国际会议
南京
英文
1-9
2010-10-22（万方平台首次上网日期，不代表论文的发表时间）