甲苯甲醇烷基化反应器模拟与分析

Simulation and analysis of reactor for toluene alkylation with methanol

基于甲苯甲醇烷基化反应动力学,分别建立了一维拟均相固定床反应器和二维拟均相固定床反应器的数学模型。在一维拟均相固定床反应器的模拟中,可以得到甲苯转化率、各种物质的摩尔分数以及反应温度随反应器轴向的变化规律。为了更详细地了解反应器的有关行为,反应器中的传质过程、传热过程、反应过程及流体流动需同时考虑。对于二维拟均相反应器的模拟,不仅可以获得甲苯转化率、反应温度等在轴向的变化规律,而且可以获得其在反应器径向上的分布。二维反应器模拟结果显示,流体的流动对反应器的行为具有十分重要的影响。

The mathematic models of the one-dimension and two-dimension pseudo-homogeneous fixed-bed reactor have been established based on ihe kinetic of toluene alkylation with methanol. Toluene conversion, mole fraction of every component, reaction temperature can be achieved from the simulation of one-dimension pseudo-homogeneous reactor. In order to have a more reasonable understand for reactor, heat transfer, mass transfer, reaction and fluid dynamics should be considered as well. In the two-dimension reactor models, not only the distribution of toluene conversion and reaction temperature along the reactor axial, but also the distribution along the reactor radial can be achieved. The results of the simulation for two dimension reactor indicate that the fluid dynamics have an important impact on the reactor.