The nanometer magnetic solid base catalyst for production of biodiesel

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• 作者：Chang Liu ; Pengmei Lv ; Zhenhong Yuan ; Fang Yan ; Wen Luo
• 关键词：Biodiesel ; Transesterification ; Nanometer ; Magnetic ; Solid base ; New crystalloid
• 刊名：Renewable Energy
• 出版年：2010
• 出版时间：July 2010
• 年：2010
• 卷：35
• 期：7
• 页码：1531-1536
• 全文大小：770 K

文摘

Nanometer magnetic solid base catalysts were prepared by loading CaO on Fe₃O₄ with Na₂CO₃ and NaOH as precipitator, respectively. The optimum conditions for preparation of this catalyst were investigated. The influence of the proportion of Ca²⁺ to Fe₃O₄ on the catalytic performance has been studied. The catalyst with highest catalytic activity has been obtained when the proportion of Ca²⁺ to Fe₃O₄ is 7:1; the catalytic activity of the catalyst calcined from Ca(OH)₂ to Fe₃O₄ is better than that calcined from CaCO₃ to Fe₃O₄; under the conditions of methanol/oil molar ratio of 15:1, catalyst dosage of 2 wt % and temperature of 70 °C, the biodiesel yield reaches 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. At the end, these catalysts were characterized by scanning electronic microscope (SEM), transmission electron microscopy (TEM), and vibrating sample magnetometer (VSM).