低浓度丙烯和苯催化精馏合成异丙苯过程非平衡级模拟

对苯与低浓度丙烯合成异丙苯的催化精馏过程建立非平衡级模型。针对模拟过程难以收敛的特点，在计算的开始阶段引入了模式搜索法（Hook-Jeeves method)求解。通过对变量的取值范围进行一定的约束，可比牛顿型法适用较宽的初值范围。计算中根据所用催化精馏塔的特点，对方程进行了一定程度的简化。得到了催化精馏塔内的温度及液相组成分布。模拟结果与试验数据吻合较好，可以为工艺设计提供参考。

Non-equilibrium Stage Model of Catalytic Distillation for Cumene Synthesis Using Low Concentration Propylene and Benzene

The non-equilibrium stage model is used to simulate catalytic distillation process for cumene synthesis using low concentration propylene and benzene. Because of high degree of nonlinear property and large amount of equations, Hooke-Jeeves method is proposed to solve the model. When the variables are limited to a certain range, Hooke-Jeeves method can converge smoothly. It permits wider range of the initial values than the Newton-type method. Some equations can be simplified according to the shape of the packed catalytic distillation column. The axial profile of temperature and concentration in the column is calculated. The results of the simulation fit in well with the data from the experimental-scale column.