摘要

苯乙烯属于机化工原料,其生产方法主要由乙苯和水蒸气反应制得，其反应器主要采用绝热固定床,有轴向和径向绝热床等。目前反应器设计及最优化,必须要有化学反应动力学模型和反应器数学模型。本次设计利用乙苯脱氢反应动力学模型,建立了一维径向微分绝热反应器数学模型,由于动力学方程的非线性性质，一般很难获得其解析解，因此本设计用MATLAB中拟均相一维模型（常微分方程）的初值问题ode45数值解法模拟计算了二段径向绝热固定床反应器一二段反应器的径向尺寸，同时对反应器的高度、体积、催化剂填充量等主要工艺尺寸进行了计算，绘制了二段绝热乙苯脱氢反应器的工艺条件图及设备布置图。

关键词 乙苯脱氢；数学模型；MATLAB；径向固定床

Abstract

Styrene is an important organic chemical products, its production method is mainly composed of ethyl benzene by catalytic dehydrogenation under excess water vapor.Ethyl benzene dehydrogenation reactor was mostly adopt the adiabatic fixed bed, how long axial thermal insulation or radial adiabatic bed, etc.The reactor design and optimization, must have the reaction kinetics model and reactor model.Using ethyl benzene dehydrogenation reaction kinetics model of the design, consider the influence of mass transfer, heat transfer, established the one-dimensional radial differential mathematical model of adiabatic reactor, due to the nonlinear nature of dynamic equation, generally difficult to obtain the analytical solution, so this design using MATLAB to homogeneous one-dimensional model (ordinary differential equation initial value problem of ode45 simulation numerical methods to calculate the secondary radial adiabatic fixed bed reactor of one section of the reactor radial dimension, to the height of the reactor at the same time, main technology, such as volume, catalyst filling quantity size was calculated, mapped the second period of adiabatic ethylbenzene dehydrogenation reactor process conditions and equipment layout.

Keywords  Ethyl benzene dehydrogenation ;Mathematical model;MATLAB; Radial fixed bed