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›› 2013, Vol. 13 ›› Issue (6): 1041-1046.

• 材料工程专栏 • Previous Articles     Next Articles

Catalytic Esterfication Preparation and Kinetics of Oleic Acid Isobutyl Ester and Its Cold Flow Properties

LI Fa-she LI Ming BAO Gui-rong WANG Hua WANG Zheng LI Yi-zhe DU Wei XU Juan   

  1. Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology Institute of Electrical Engineering, Chinese Academy of Science Engineering Research Center of Metallurgical Energy Conservation and Emission Reduction, Ministry of Education, Kunming University of Science and Technology Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology The Basis of the Department, Southwest Forestry University
  • Received:2013-09-12 Revised:2013-10-21 Online:2013-12-20 Published:2013-12-20
  • Contact: LI Fa-she

油酸异丁酯的离子液体催化酯化制备与动力学及其低温流动性能

李法社 李明 包桂蓉 王华 王峥 李一哲 杜威 徐娟   

  1. 昆明理工大学冶金与能源工程学院 中国科学院电工研究所 昆明理工大学冶金与能源工程学院 昆明理工大学冶金与能源工程学院 昆明理工大学冶金与能源工程学院 昆明理工大学冶金与能源工程学院 昆明理工大学冶金与能源工程学院 西南林业大学基础部
  • 通讯作者: 李法社

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Abstract: Preparation of oleic acid isobutyl ester using [HPY][HSO4] ionic liquid as catalyst and ethanol and oleic acid as reactants was carried out in a self-designed reactor. The optimum reaction conditions were obtained as temperature 100℃, time 3 h, catalyst dosage 2%(w) and volume ratio of ethanol to oleic acid 2:1. Kinetic analysis of the catalytic esterification reaction indicated that the apparent reaction order was 1.0, activation energy Ea 32.0 kJ/mol, frequency factor 66.6 and reaction kinetics model -dCA/dt=66.6e-32000/(RT)CACB. The prepared oleic acid isobutyl ester had low temperature performance and poor flowability with the pour point of -25.5℃, cold filter plugging point of -20.5℃ and kinematic viscosity of 6.32 mm2/s. The low temperature performance of biodiesel and flowability of oleic acid isobutyl ester were improved by blending it with Jatropha curcas L. seed oil.

Key words: oleic acid isobutyl ester, catalytic esterfication, ionic liquid, kinetics, cold flow property

摘要： 在自行设计的反应装置中，以吡啶硫酸氢盐离子液体为催化剂、油酸与异丁醇为反应原料催化酯化制备油酸异丁酯. 得到最佳反应条件为，温度100℃，时间3 h，催化剂用量2%(w)，醇/酸最佳体积比2:1. 对此酯化催化反应进行了动力学分析，表观反应级数为二级，反应活化能Ea=32.0 kJ/mol，频率因子A=66.6，反应动力学模型为-dCA/dt=66.6e-32000/(RT)CACB；所制油酸异丁酯的凝点为-25.5℃，冷滤点为-20.5℃，运动粘度为6.32 mm2/s，其低温性能好，流动性能较差，可很好地改进生物柴油的低温性能和油酸异丁酯的流动性能.

关键词: 油酸异丁酯, 催化酯化, 离子液体, 动力学, 低温流动性能

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