NH_3和CO_2的选择性分离II.连续吸收器研究和机理论证  

Selective Separation of NH_3 and CO_2 Mixture Gas II. Continuous Absorber Investigation and Mechanism Demonstration

作　　者：蔡平雄[1] 张成芳[1] 郑志胜[1] 钦淑均[1] 

机构地区：[1]华东理工大学化工工艺研究所,上海200237

出　　处：《华东理工大学学报（自然科学版）》2002年第2期122-126,143,共6页Journal of East China University of Science and Technology

摘　　要：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 CO2A selective absorption was studied to separate the mixture gas of NH 3/CO 2=2(mol ratio) by the continuous absorber in high gas velocity, then the satisfactory selectivity was obtained. The selectivity factor of S 1 is 3.25～8.23, and S 2 is 3.99～9.56. The influence factors on selectivity absorption such as concentration of NH 3, gas velocity, aperture size and insertion depth were also studied. It is concluded that the high gas velocity, large aperture size, shallow insertion depth and lower concentration of NH 3 are benefit to selective absorption of NH 3. It is demonstrated that the mechanism of absorption of ammonia is controlled by gas film and the absorption of carbon dioxide is regarded as fast pseudo first order reaction.

关 键 词：NH3/CO2混合气 高气速 选择性吸收 连续吸收器 拟一级快反应 

分 类 号：TQ028.1[化学工程] O643.13[理学—物理化学]