SKI-210催化二甲苯异构化反应的动力学研究

KINETICS OF XYLENE ISOMERIZATION CATALYZED BY SKI-210 CATALYST

利用固定床反应装置,研究了SKI-210催化二甲苯异构化反应动力学。反应网络包括3种二甲苯异构体之间的连串主反应和二甲苯的歧化副反应。选择基于Langmuir吸附的一级反应动力学模型,采用初始速率法拟合得到反应速率常数和吸附平衡常数。模型计算得到的反应转化率与试验值吻合较好。利用该模型进行模拟分析,能较准确地描述反应条件对对二甲苯收率的影响。

The kinetics of xylene isomerization catalyzed by SKI-210 catalyst was studied in a fixed bed reactor.The reaction network consists of a consecutive reaction between three xylene isomers and a disproportionation of xylene.The first order kinetics model based on Langmuir adsorption was selected and the reaction rate constants and adsorption equilibrium constant were obtained by using the initial rate method at different reaction temperatures.The conversion calculated by the model is in good agreement with the experimental data,and the model can be used to describe the effect of reaction conditions on the yield of p-xylene.