乙炔选择加氢动力学研究

Kinetic study of acetylene selective hydrogenation

利用工业催化剂PEC-21,采用内循环无梯度反应器进行了乙炔选择加氢反应,测定动力学实验数据,使用Matlab数学软件拟合了动力学模型,得到最佳的LHHW型动力学方程,用Aspen Plus化工模拟软件对乙炔加氢反应过程进行了稳态和动态模拟。分析了工业装置前加氢反应器入口温度对乙炔选择加氢催化剂性能的影响,得出了最佳工艺条件为:当一段反应器出口中的乙炔转化率为60%时,最佳进口温度为58.72℃;二段反应器出口中的乙炔累积转化率为95%时,最佳进料温度为59.95℃;三段反应器出口中的乙炔含量小于10^(-6)(x)时,最佳进料温度为60.36℃。控制一段反应器进料温度不超过70.98℃。

The kinetics of front-end acetylene hydrogenation was studied by using an internal recycle gradientless reactor.The kinetic experimental data was gotten using the industrial catalyst PEC-21 and after fi tted by the mathematical software Matlab,the best LHHW kinetic model was got.The steadystate simulation and dynamic simulation of acetylene hydrogenation were carried out by the Aspen Plus(chemical process simulation software).The influence of inlet temperature of raw materials on the performance of the catalyst in the front-end acetylene hydrogenation reactor was analyzed,and the best operating conditions were got:the optimum inlet temperature was 58.72℃when the acetylene conversion was 60%in the fi rst reactor;the optimum inlet temperature was 59.95℃when the acetylene total conversion was 95%in the second reactor;and the optimum inlet temperature was 60.36℃when the acetylene content in the third reactor outlet was less than 10-6(x).It was necessary to keep the inlet temperature of the first reactor less than 70.98℃.