鼓泡塔反应器中乙烯-苯体系气液传质系数的测定  

Measurements of Gas-Liquid Mass Transfer Coefficients of Ethyl-Benzene System in Bubble Column Reactor

作　　者：王玉华[1] 朱学栋[1] 卞太锋[1] 吴勇强[1] 朱子彬[1] 

机构地区：[1]华东理工大学工业大型反应器工程教育部工程研究中心,上海200237

出　　处：《高校化学工程学报》2008年第3期389-394,共6页Journal of Chemical Engineering of Chinese Universities

基　　金：教育部"长江学者与创新团队发展计划"资助项目

摘　　要：以乙烯-苯系统为对象,借助计算机图像处理技术,采用单孔进气,研究了常温常压下鼓泡塔反应器内的传质特性。实验结果表明:在塔内液体循环速度0.02m·s-1,空塔气速2.1×10-4~6.1×10-4m·s-1、进气孔径0.8~2mm实验条件下,乙烯在苯中的吸收溶解过程主要与温度、压力及气体和液体的性质有关;吸收过程刚开始时,气泡当量直径较大,气泡消失速率较大,吸收过程类似于CO2在水中的吸收过程;气液传质比表面积a随着空塔气速的增大而增大,孔径和空塔气速的影响可以忽略;气液传质系数kL受空塔气速、进气孔径变化的影响很小,其值约为1.372×10-4m·s-1。The gas-liquid transfer characteristic of bubble column reactor with a single nozzle of gas phase inlet was studied for ethylene-benzene system at room temperature and atmosphere pressure by means of computer image processing technology. It was found that under the conditions of the liquid superficial velocity of 0.02 m·s-1, gas superficial velocity of 2.1×10-4~6.1×10-4m·s-1 and the nozzle diameter of 0.8~2 mm, the processes of absorption and dissolution of ethylene in benzene are mainly determined by the t...

关 键 词：单孔 气液传质 传质系数 鼓泡塔 

分 类 号：TQ021.4[化学工程]