固定床吸附过程传热传质耦合影响数值模拟  

Numerical simulation on fixed bed adsorption process with coupled effect of heat and mass transfer

作　　者：李立清[1] 孙政[1] 邢俊冬[1] 刘伟[1] 宋剑飞[1] 刘铮[1] 

机构地区：[1]中南大学能源科学与工程学院,湖南长沙410083

出　　处：《化工学报》2010年第11期2810-2816,共7页CIESC Journal

基　　金：国家自然科学基金项目(20676154;20976200)~~

摘　　要：To explore the coupled effect of heat and mass transfer,the coupled model of heat and mass transfer for a fixed bed adsorption process was established according to the Soret effect and the Dufour effect theory.Numerical analysis methods were adopted to discuss the influences of heat transfer coefficients,mass transfer coefficients,and the coupled effect of heat and mass transfer on the fixed bed adsorption process respectively.Results have shown that heat transfer coefficients have little effect on mass transfer.To the degree of influence on the temperature field,the greatest is the heat transfer coefficient,followed by the axial thermal conductivity,the smallest is the external heat transfer coefficient.The mass transfer coefficients have some impact on the heat transfer and the mass transfer effect caused by the temperature gradient is more obvious than the heat transfer effect caused by the concentration gradient.To explore the coupled effect of heat and mass transfer,the coupled model of heat and mass transfer for a fixed bed adsorption process was established according to the Soret effect and the Dufour effect theory.Numerical analysis methods were adopted to discuss the influences of heat transfer coefficients,mass transfer coefficients,and the coupled effect of heat and mass transfer on the fixed bed adsorption process respectively.Results have shown that heat transfer coefficients have little effect on mass transfer.To the degree of influence on the temperature field,the greatest is the heat transfer coefficient,followed by the axial thermal conductivity,the smallest is the external heat transfer coefficient.The mass transfer coefficients have some impact on the heat transfer and the mass transfer effect caused by the temperature gradient is more obvious than the heat transfer effect caused by the concentration gradient.

关 键 词：吸附 传热 传质 Soret效应 Dufour效应 

分 类 号：TQ028.15[化学工程]