中空纤维膜接触器分离CO_2/N_2混合气体的研究  

Study on hollow fibre membrane contactor for the separation of carbon dioxide from carbon dioxide-nitrogen mixture

作　　者：陈炜[1] 朱宝库[1] 王建黎[1] 徐又一[1] 徐志康[1] 

机构地区：[1]浙江大学高分子科学研究所,杭州310027

出　　处：《膜科学与技术》2004年第1期32-37,共6页Membrane Science and Technology

基　　金：国家自然科学基金资助项目(59833120)

摘　　要：以氢氧化钠(NaOH)、单乙醇胺(MEA)、二乙醇胺(DEA)为吸收剂,采用疏水性聚丙烯中空纤维微孔膜接触器技术进行了从CO2/N2混合气中分离CO2的研究.从机理上简要探讨了影响CO2吸收传质的因素.结果表明:3种吸收剂分离CO2的效率依次为MEA>NaOH>DEA,CO2的分离效率随吸收剂浓度和流速的提高而增大,随混合气流速及其中CO2浓度的增大而减小;在壳流程与腔流程的对比中腔流程对CO2的吸收效率要明显好于壳流程.Hydrophobic polypropylene hollow fibre porous membrane contactor was applied to the separation of carbon dioxide(CO_2)from CO_2-nitrogen (N_2) mixture using monoethanolamine,sodium hydroxide and di-ethanol amine aqueous solution as absorbents.The results indicated that the absorption performances of three absorbents were in the sequence of monoethanolamine >sodium hydroxide> di-ethanol amine.Both the removal efficiency and mass transfer coefficients of CO_2 increased with the increasing of concentration and flow rate of absorbent solutions.The influences of the factors on CO_2 absorption efficiency were interpreted on the basis of mass transfer mechanism.

关 键 词：聚丙烯 中空纤维膜 膜接触器 二氧化碳 吸收剂 

分 类 号：TQ028[化学工程]