沸石催化剂上苯与二异丙苯烷基转移化反应动力学

Reaction Kinetics of the Transalkylation of Benzene and Diisopropylbenzene Over Zeolite

应用序贯实验设计法求得沸石催化剂上苯与二异丙苯烷基转移化反应动力学方程．在搅拌等温间歇不锈钢压力反应釜中，测得１７０～２４０℃范围内的动力学数据，并对动力学方程进行参数估值．首先应用Ｈｏｏｋｅ－Ｊｅｅｖｅｓ模式搜索法求取参数初值，而后用高斯－牛顿法求得最佳参数值；异丙苯的摩尔分率计算值由Ｒｕｎｇｅ－Ｋｕｔｔａ法求出．得出动力学方程为其中Ｋ＝５．５６ｅｘＰ（－４７７．９／Ｔ）．通过方差及残差分析证明该动力学方程是适宜的．

eaction kinetics of the transalkylation of benzene and di-isopropylbenzene over zeolite was studied by sequential experimental design method.Under the temperature range of 170～240℃ and the pressure range of of 4～1.2 MPa,the kinetic data were determined in an isothermic intermittent stainless steel reactor.The initial parameters and optimum parameters of mathematic model were estimated by the.Hooke-Jeeves pattern search method and the Gauss-Newton method respectively.The calculated value of isopropylbenzene molar fraction was regressed by the Runge-Kutta method. The kinetic equation has been proposed as follows:8.65×105exp(-4 988.4/T.).where K=5.56exp(-477.9/T).The equation verified by the variance and residual analysis is valid.