苯与丙烯催化反应器的设计

Design of Catalytic Reactor for Alkylation of Benzene with Propylene

分别对苯与丙烯烷基化合成异丙苯的悬浮床催化精馏塔和固定床反应器进行了设计。建立了悬浮床催化精馏塔的工艺计算和流体力学模型 ,并对 48kt/a异丙苯悬浮床催化精馏塔进行了设计。设计结果表明 ,操作点处于塔板的适宜操作区范围之内。固定床反应器的设计是在满足全床层压降限制条件下 ,催化剂粒径由 3 75mm降至2mm ,增大了液固传质系数 ,提高了催化反应速率。

The suspension catalytic distillation column and the fixed-bed reactor for alkylation of benzene with propylene to produce cumene were designed.Process and fluid hydrodynamic models were set up for the suspension catalytic distillation column.A column for producing 48 thousand tons cumene per year was designed which showed that the operation point is within the range of normal operating zone.The design of the fixed-bed reactor was made to satisfy the limitation of total pressure drop across the bed by changing the diameter of catalyst particle from 3.75 mm to 2 mm.The result was that the liquid-solid transfer coefficient,surface area per unit volume of catalyst particle,internal diffusion effectiveness factors and effective reaction rate constants all increased.