黏弹性流体中伴有化学反应的气液传质过程  

Gas-liquid mass transfer process containing reaction in viscoelastic fluids

作　　者：王爽[1] 王岳[1] 李少白 WANG Shuang;WANG Yue;LI Shao-bai(Liaoning Shihua University,College of Petroleum Engineering,Fushun 113001,Liaoning Province,China;School of Energy and Environment,Shenyang Aerospace University,Shenyang 110136, Liaoning Province,China)

机构地区：[1]辽宁石油化工大学石油天然气工程学院,辽宁抚顺113001 [2]沈阳航空航天大学能源与环境学院,辽宁沈阳110136

出　　处：《化学工程》2018年第11期11-15,共5页Chemical Engineering(China)

基　　金：国家自然科学基金资助项目(21406141);辽宁省博士启动基金(20141078);辽宁省教育厅科学研究一般项目(L2014060;L201733)

摘　　要：利用鼓泡塔进出口的二氧化碳流量变化值,实验测定了二氧化碳在不同浓度的聚丙烯酰胺PAA水溶液中的化学吸收速率。探讨了液相的流变性和Na OH浓度对化学吸收速率R_A的影响,通过R_A与物理吸收的液相体积传质系数k_La相结合,进一步得到了强化因子β。结果表明:R_A随着PAA质量分数的增大而减小,随着Na OH质量分数的增大而增大。基于双膜理论,与CO_2与Na OH的理化性质及其之间的反应动力学,结合文献中物理吸收的黏弹性流体的传质关联式,提出一个半理论模型用来计算CO_2的化学吸收速率R_A,该模型的预测值与实验值吻合良好。文中的研究结果将有助于深入理解黏弹性流体中伴有化学反应的气液传质过程机理。The chemical absorption rate of carbon dioxide in different concentration polyacrylamide(PAA)solutions was measured using the flow difference value of inlet and outlet of bubble column experimentally.The influences of liquid phase rheological properties and the concentrations of NaOH on chemical absorption rate R A were investigated,and the enhancement factorβwas obtained by R A and the liquid volumetric mass transfer coefficient k L a of physical absorption.The results indicate that the R A decreased with increasing of PAA concentration,and increased with increasing of NaOH concentration.Based on the two-film theory and reaction kinetics of CO 2 and NaOH,and taking into account the classical correlation of gas-liquid mass transfer of physical absorption in visocoelastic liquid,a semi-theoretical model was developed by introducing to calculate the chemical absorption rate R A of CO 2 in viscoelastic fluids.The predictions of this model were compared with the experimental date and a satisfactory agreement was found.The results shown in the present work will contribute to understanding mechanism of the gas-liquid mass transfer containing reaction in viscoelastic fluid.

关 键 词：粘弹性流体 化学反应 气液传质 强化因子 化学吸收速率 

分 类 号：TQ021.4[化学工程]