等离子体聚吡啶-金属基复合膜的醇-水混合液渗透蒸发分离  

PERVAPORATION OF WATER-ETHANOL BINARY MIXTURE THROUGH PLASMAPOLYPYROLIDINE/Ni COMPOSITE MEMBRANE

作　　者：李广涛[1] 朱传剑 李荣志[2] 朱鹤孙[1] 

机构地区：[1]北京理工大学 [2]北京理工大学工程系应用化学研究室,北京市100081

出　　处：《材料科学进展》1992年第1期73-77,共5页

基　　金：国家自然科学基金;5880005

摘　　要：等离子体聚吡咯啶-金属基复合分离膜是一种水优先透过型高效分离膜,其分离系数(α)和渗透通量(J)分别达6.8和1.84kg/m^2h(88 wt-%EtOH,59℃),且连续操作数月后分离性能没有明显衰减。在醇-水混合液高浓度区,该膜表现出很强的循环处理能力:8.8kg/m^2h(88—92%)、6.84kg/m^2h(90.5—95.5%),9.89kg/m^2h(96—99%),与蒸馏法组合使用,可望成为一种实用的乙醇提取工艺。A novel water-selectivity composite membrane for pervaporation ofwater-ethanol mixtures was developed by depositing plasmapolypyrolidine on Nickle plate.Itshows good separation ability:6.8[α],1840 g/m^2h[J],and long service life.Used in continu-ous pervaporation of water-ethanol mixtures with high ethanol content(>80%),the mem-brane possesses high treatment capacity:8800 g/m^2h(88—92 wt—%),6840g/m^2h(90.5—95.5% wt—%),9890g/m^2h(96—99 wt—%).These results indcate that an energy-savedhybird separation porcess composed of pervaporation and distillation is expected fordehyration of water-ethanol binary mixtures.

关 键 词：膜分离 蒸发 等离子体 聚合 复合膜 

分 类 号：TQ028.8[化学工程]