气液液三相体系中的气液传质特征  

Characteristic of gas-liquid mass transfer in a gas-liquid-liquid system

作　　者：李文秀[1,2] 杨立红[1] 于三三[1] 张志刚[1] 纪智玲[1] 

机构地区：[1]沈阳化工学院化学工程系,辽宁沈阳110142 [2]天津大学化学工程学院,天津300072

出　　处：《化学工程》2009年第1期1-3,14,共4页Chemical Engineering(China)

基　　金：国家自然科学基金资助项目(20776086);辽宁省教育厅高等学校科学研究项目A类(05L333)

摘　　要：选取CO2-K2CO3/KHCO3为吸收体系,次氯酸钠为催化剂,甲苯、异戊醇为第2液相,应用Danckwerts图来同时确定液侧传质系数KL和界面面积a,通过实验研究了分散第2液相的加入对气液传质的影响。实验结果表明,随着分散相体积分数φ(1%—10%)的增大,或分散相形成的液滴直径的减小,以及传质组分在分散相和连续相中溶解度的比值m(即传质组分在实验体系的分配系数)增加,或在二相间的相对扩散系数增加时,可显著增强气液传质,为气液液三相体系的系统化研究提供了实验依据。Taking CO2-K2CO3/KHCO3 as the absorption system, sodium hypochlorite as the catalyst, toluene and isoamyl alcohol as the second liquid phase, the effect of the dispersed second phase on the gas-liquid mass transfer was studied by the experiment. Danckwerts method was applied to determine the individual coefficient mass transfer KL and the interracial area a simultaneously. The results show that with increasing volume fraction φ（ 1% -10% ） of dispersed phase and decreasing droplet diameter as well as increasing solubility ratio of mass transfer component in continuous phase and dispersed phase （ i. e. partition coefficient of the mass transfer component in the experimental system ） or increasing relative diffusion coefficient, the gas-liquid mass transfer can be remarkably enhanced, which provides the experimental basis for the study of gas-liquid-liquid system.

关 键 词：气液传质 分散第2液相 传质系数 

分 类 号：TQ02[化学工程]