甲醇制烯烃反应动力学

Kinetics of methanol to olefins

在固定床等温积分反应器内进行了甲醇制烯烃反应动力学研究,借助集总动力学的概念,充分考虑到水和积炭对反应过程的影响,得到甲醇制烯烃反应动力学模型方程.采用RungeKutta法求解动力学微分方程,并优化动力学参数,最终得到了可计算各集总组分反应速率的总动力学方程.然后根据乙烯、丙烯、丁烯相互之间的比值随温度的变化规律,分别计算出乙烯、丙烯、丁烯在任一条件下的反应速率方程.通过统计检验及计算值与实验值的比较,结果较为满意.

The kinetics of methanol to olefins in the fixed-bed isothermal integral reactor was studied. The lumping idea was introduced into the kinetics study, in which the influence of water and coke deposition was taken into consideration. The equations of kinetics on fresh and deactivated catalyst were calculated with the help of the simplex optimization and Runge-Kutta methods. The obtained general kinetics equations could be used to calculate the reaction rates of corresponding lump. Subsequently, the respective reaction rate of ethylene, propylene, butene in any conditions were calculated based on the relation of ratios between olefins （ethylene/propylene and propylene/butene） and reaction temperature. The results showed that the error of statistical test and comparison of calculated values with the experimental values was in the allowable range.