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在优化的物料醇油的物质的量比为6∶1、催化剂KOH用量为小桐子油质量的1.2%和超声波功率为180W条件下,研究超声波强化连续制备小桐子生物柴油的动力学行为,采用Origin软件拟合曲线方程,建立宏观动力学模型。结果表明,超声波强化连续酯交换反应制备小桐子油生物柴油的反应基本遵循1.87级,反应速率随温度的升高而加快,二者符合Arrhenius方程,该反应的活化能为36.66kJ·mol-1,频率因子为8.98×106。建立的反应动力学模型将为扩大试验和在超声波作用下管道式连续酯交换制备小桐子油生物柴油工艺的工业化应用提供理论依据。
The optimum kinetic behavior of ultrasonic fortified Jatropha biodiesel was studied under the following conditions: the mass ratio of material to alcohol was 6:1, the amount of catalyst KOH was 1.2% and the ultrasonic power was 180W. Origin software fitting curve equation, the establishment of macroscopic kinetic model. The results showed that the ultrasonic enhanced sequential transesterification reaction of Jatropha curcas oil biodiesel basically follow the 1.87 level, the reaction rate increases with temperature to speed up, both consistent with Arrhenius equation, the activation energy of the reaction was 36.66kJ · mol-1 , The frequency factor is 8.98 × 106. The established reaction kinetic model will provide a theoretical basis for expanding the industrial application of Jatropha curcas oil biodiesel process and the continuous transesterification of the pipeline under ultrasonic wave.