LH 375催化剂乙苯脱氢动力学模型

采用绝热固定床反应器,在负压条件下,研究了乙苯脱氢在催化剂LH375上的反应规律,并在此基础上建立了反应动力学模型。结果表明:由动力学方程计算的反应结果与实验结果基本吻合,转化率的最大相对误差为2.8%,平均相对误差为1.1%;选择性的最大相对误差为1.6%,平均相对误差为0.64%。并采用所建模型考察了温度、空速、水油比、出口压力等工艺条件对反应转化率和选择性的影响,发现模型模拟规律完全符合工业生产中乙苯脱氢的反应规律。

Kinetic model of ethylbenzene dehydrogenation to styrene on LH 375 type catalyst

The course of reaction of ethylbenzene dehydrogenation to styrene on LH 375 type catalyst was researched by u-sing the adiabatic fixed bed reactor under vacuum, and the kinetic model was established on the basis of the research. The comparesions showed that the results acquired from the model matched well with the values from the experiment. The maximal relative error between the calculated date and the experiment date was 2. 8% for conversion and 1. 6% for selectivity, and the average relative error was k 1% for conversion and 0. 64% for the latter. The influence effects such as reac-tion temperature, space velocity, H2O/EB mass ratio, outlet pressure on reaction conversion and selectivity were simulated, and a good consistency has been found with the practical performance of the commercial unit.