苯酚加氢反应器模拟和工艺条件优化

Reactor simulation and operating conditions optimization of reactor for phenol hydrogenation

针对苯酚加氢生产环己酮的管式固定床反应器,建立了一维拟均相数学模型,采用Runge-Kutta法求解数学模型;对苯酚加氢反应动力学模型中的各参数进行了计算拟合,通过Matlab软件计算了苯酚加氢反应器中的反应规律,并证明了所建立的一维拟均相数学模型的可靠性。考察了反应器的操作参数对苯酚加氢反应的影响,综合考虑各参数的影响,得到了较优的反应器操作条件:气体入口温度185℃、原料气进料量300 mol/s、操作压力0.2 MPa、原料气中氢气与苯酚的摩尔比6∶1、管外载热体温度180℃。在此条件下,苯酚的转化率为98.8%,目标产物环己酮的选择性达到91.7%,满足工业生产要求,为工业化反应器设计提供了理论依据。

By analyzing and simplify the process of phenol hydrogenation,a one-dimensional mathematical model of heat transfer fixd-bed reactor was built and calculated using the method of Runge-Kutta.The parameters in the kinetic model of phenol hydrogenation were calculated,and the reaction law in the tube reactor was calculated by Matlab software and the reliability of onedimensional homogeneous mathematical model was proved.The effects of various operating parameters on the reaction were investigated,taking into account all the factors,and the optimum operating conditions were obtained.Under such conditions,the inlet temperature of tube reactor 185℃,feed fl ow rate 300 mol/s,0.2 MPa,n(H2)∶n(C6H5OH)6∶1 and temperature of coolant 180℃,the conversion of phenol was 98.8%,and the selectivity of the target product,cyclohexanone,was 91.7%,which meets the requirements of industrial production and also provided the theoretical basis for industrial reactors design.