用连续吸收器对 NH3 /CO2 摩尔比为 2的混合气体进行高气速选择性吸收研究 ,获得了良好的分离效果 ,选择性分离因子 S1为 3.2 5～ 8.2 3,S2 为 3.99～ 9.5 6;考察了孔口气速、孔径、液相氨浓度和插入深度等因素对选择性吸收的影响 ,结果表明 ,高气速、大孔径、浅插入和低氨浓度有利于氨的选择性吸收。数据整理证实了氨吸收的机理为气膜控制及 CO2 吸收为拟一级快反应的选择性吸收 The selective absorption of gas mixtures with NH3 / CO2 molar ratio 2 was studied by continuous absorber, and the good separation effect was obtained. The selectivity separation factor S1 was 3.2 5 ~ 8.2 3 and S2 was 3.99 ~ 9.5 6. The effects of gas velocity, pore size, liquid ammonia concentration and insertion depth on selective absorption were investigated. The results show that high gas velocity, large pore size, shallow insertion and low ammonia concentration are favorable for the selective absorption of ammonia. Data processing confirmed that the mechanism of ammonia absorption for the control of membrane and CO2 absorption for the quasi-one-stage selective absorption of fast response