| 固体酸SO_4~(2-)/SnO_2-SiO_2催化制备生物柴油 |
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| 引用本文： | 乔仙蓉,李福祥,吕志平,薛建伟.固体酸SO_4~(2-)/SnO_2-SiO_2催化制备生物柴油[J].太原理工大学学报,2010,41(1). |
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| 作者姓名： | 乔仙蓉 李福祥 吕志平 薛建伟 |
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| 作者单位： | 1. 太原理工大学,精细化工研究所,太原,030024;山西工程职业技术学院,太原,030009
2. 太原理工大学,精细化工研究所,太原,030024 |
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| 摘 要： | 以固体酸SO42-/SnO2-SiO2为催化剂,催化大豆油和甲醇制备生物柴油,考察了催化剂的制备条件和反应的最佳条件。结果表明,当催化剂的n(Sn)/n(Si)摩尔比达1∶3以上,浸渍硫酸溶液浓度为1.0~1.5 mol/L,450℃焙烧5 h,催化剂对酯交换反应有高催化活性,催化剂的活性不受体系中游离脂肪酸的影响,醇油摩尔比为13∶1,每摩尔油使用1.0 g催化剂,120℃反应3h,脂肪酸甲酯收率达90%以上。催化剂的吡啶红外谱图表明催化剂具有L酸中心和B酸中心,催化剂的NH3-TPD曲线表明催化剂具有超强酸性。
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| 关 键 词： | 生物柴油 酯交换 固体酸 |
The Preparation of Biodiesel with the Catalysis of Solid Acid SO_4~(2-)/SnO_2-SiO_2 |
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| QIAO Xian-rong,LI Fu-xiang,LU Zhi-ping,XUE Jian-wei.The Preparation of Biodiesel with the Catalysis of Solid Acid SO_4~(2-)/SnO_2-SiO_2[J].Journal of Taiyuan University of Technology,2010,41(1). |
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| Authors: | QIAO Xian-rong LI Fu-xiang LU Zhi-ping XUE Jian-wei |
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| Institution: | QIAO Xian-rong1,2,LI Fu-xiang1,LU Zhi-ping1,XUE Jian-wei1 (1.Institute of Special Chemicals of TUT,Taiyuan 030024,China,2.Shanxi Engineering Vocational College,Taiyuan 030009,China) |
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| Abstract: | Biodiesel was obtained through transesterification of soybean oil with methanol, using SO_4~(2-)/SnO_2-SiO_2 as a solid acid catalyst. Catalyst preparation factors and reaction factors were investigated. It was found that SO_4~(2-)/SnO_2-SiO_2 exhibited high activity for transesterification under the conditions of n(Sn)/n(Si) over 1/3, the concentration of impregnating sulfuric acid solution at 1.0～1.5 mol/L, calcination temperatature at 450℃ . The activity of the catalyst was not affected by the presence of fatty acid. The yield of methylesters reached over 90% under the condition of methanol/oil mole the catalyst absorbing pyridine shows that there were Lewis and Bronsted acid sites on the catalyst. NH_3-TPD mesurement shows that the catalyst had superacidity. |
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| Keywords: | biodiesel transesterification solid acid |
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