微通道反应器内CO2传质反应行为研究  

Study on mass transfer reaction behavior of CO2 inmicrochannel reactor

作　　者：马昱刚 宋绍富[1] MA Yu-gang;SONG Shao-fu(College of Chemistry and Chemical Engineering,Xi′an Shiyou University,Xi′an 710065,Shaanxi Province,China)

机构地区：[1]西安石油大学化学化工学院

出　　处：《化学工程》2020年第1期60-63,73,共5页Chemical Engineering(China)

摘　　要：以水平放置圆形截面的微通道反应器,进行K2CO3-CO2两相流传质实验。研究气速、液速、管径以及反应时间对微通道中瞬时吸收速率及气液两相传质的影响。实验结果表明:雷诺数Re与流动状态关系与传统理论类似;微通道中气液两相传质系数在0.1-6s^-1之间,K La随液体表观速率的增大而增大;随气体表观速率的增大而减小,属于液膜控制反应;随通道尺寸的增大,传质系数减小;瞬时吸收速率随时间先增大后减小并趋于平稳。The experiment of K2 CO 3-CO2 two-phase flow mass transfer was carried out in a microchannel reactor with horizontal cross section as circular section.The effects of gas velocity,liquid velocity,pipe diameter and reaction time on the instantaneous absorption rate and gas-liquid two-phase mass transfer in the microchannel were studied.The experimental results show that the relationship between Reynolds number and flow state is similar to the traditional theory.The gas-liquid two-phase mass transfer coefficient in microchannel is between 0.1 s^-1 and 6 s^-1,and K La increases with the increase of liquid apparent rate,while it decreases with the increase of gas apparent rate,which belongs to liquid membrane control reaction.As the channel size increases,the mass transfer coefficient decreases,and the instantaneous absorption rate increases first and then decreases and tends to be stable.

关 键 词：微通道 两相流型 气液反应 传质 

分 类 号：TQ021[化学工程]