Janus膜的制备及其在CO_(2)强化吸收中的研究  

Preparation of Janus membrane and its application in CO_(2) enhanced absorption

作　　者：吴文渊 李韵浩 付晓燕 刘铭辉 康国栋[2] 曹义鸣[2] 车如心[1] 于海军[2] WU Wenyuan;LI Yunhao;FU Xiaoyan;LIU Minghui;KANG Guodong;CAO Yiming;CHE Ruxin;YU Haijun(School of Environment and Chemical Engineering,Dalian Jiaotong University,Dalian 116023,China;Dalian National Laboratory for Clean Energy,Dalian Institute of Chemical Physics,Chinese Academy of Sciences,Dalian 116023,China;Dalian Ecological Environment Monitoring Center of Liaoning Province,Dalian 116023,China;CNOOC EnerTech-Safety&.Environmental Protection Co.,Tianjin 300457,China)

机构地区：[1]大连交通大学,大连116023 [2]中国科学院大连化学物理研究所,大连116023 [3]辽宁省大连生态环境监测中心,大连116023 [4]中海油能源发展股份有限公司安全环保分公司,天津300457

出　　处：《膜科学与技术》2023年第3期54-63,73,共11页Membrane Science and Technology

基　　金：国家自然科学基金面上项目(22178334,21978284);陕西省重点研发计划项目(2021SF-449)。

摘　　要：分别以亲水性和疏水性聚合物溶液为外层和内层制膜液,通过共挤出法制备双层膜.以正丙醇为芯液,水为凝胶浴,调控成膜过程中的热力学和动力学参数,成功制备出外层亲水/内层疏水的Janus中空纤维膜.Janus中空纤维膜的外层水接触角为44°,内层水接触角为131°.将Janus膜应用于模拟烟道气中CO_(2)吸收研究,考察气/液压差、吸收液体积流量和亲/疏水层厚度对CO_(2)吸收性能的影响.结果表明,当气-液压差为0.11 MPa时,模拟烟道气中CO_(2)吸收率达到99.43%,气体处理通量为6050 L/(m^(2)·h);在240 min连续吸收过程中,Janus膜的气体处理通量和CO_(2)吸收率保持稳定.The dual-layer membranes were prepared by co-extrusion method which adopt hydrophilic and hydrophobic dope solutions as the outer and inner membrane solutions.With n-propanol as the bore liquid and water as the external water bath,the thermodynamic and kinetic parameters in the film-forming process were adjusted to successfully prepare the Janus hollow fiber membrane which had a structure of outer hydrophilic/inner hydrophobic.The water contact angle of the outer layer and inner layer of the Janus hollow fiber membrane were 44°and 131°separately.Janus membrane was applied to the absorption process of CO_(2) in simulated flue gas.The effects of gas/liquid pressure difference,absorbent volume flow and hydrophilic/hydrophobic layer thickness on CO_(2) absorption performance were investigated.When the gas/liquid pressure difference was O.11 MPa,the CO_(2) absorption rate in the simulated flue gas reached 99.43%,and the gas treatment flux was 6050 L/(m^(2).h).During the 240 min continuous absorption process,the gas treatment flux and CO_(2) absorption rate remained stable.

关 键 词：Janus中空纤维膜 微气泡 CO_(2)吸收 

分 类 号：TQ028.8[化学工程]