中文摘要：

为了加深对二甲苯异构化过程的理解,获得优化的操作参数,在固定床反应器中考察改性HZSM-5催化剂上间二甲苯（MX）异构化反应过程。同时,选用Powell法与四阶龙格库塔法相结合的数学方法,对实验数据进行拟合,回归出各反应温度下的反应速率常数,采用线性拟合获得300～390℃时的反应动力学参数,并模拟计算了反应温度和进料空速对反应结果的影响。研究发现在300℃下、空速2.0×103h-1时对二甲苯（PX）产率可达20%。

英文摘要：

To understand the process of m-xylene（MX） isomerization and obtain the optimizing operation conditions,MX isomerization was studied in a fixed-bed reactor packed with modified HZSM-5 zeolite catalyst.The experimental data were fitted to obtain reaction rate constants at each temperature by using Powell method combined with the classical fourth-order Runge-Kutta method.Linear correlation on the reaction rate constants was further performed to obtain reaction kinetics parameters among 300-390 ℃.The influences of reaction temperature and feeding space velocity to the reaction were investigated based on the model.The p-xylene（PX） yield of 20% was obtained at 300 ℃ while the space velocity was 2.0×103 h-1.