高通量ZSM-5填充硅橡胶复合膜渗透汽化性能研究  

Pervaporation performance of ZSM-5 filled silicone composite membranes with high flux

作　　者：展侠[1] 李继定[1] 操建华[1] 黄军其[1] 陈翠仙[1] 

机构地区：[1]清华大学化学工程系膜技术工程研究中心,北京100084

出　　处：《膜科学与技术》2009年第4期25-28,共4页Membrane Science and Technology

基　　金：国家"973"项目(2003CB615701);国家自然科学基金项目(20576059;20676067;20736003);国家"863"计划项目(2007AA06Z317);中石化科技开发研究基金(X505002)

摘　　要：以硅铝比为360的ZSM-5型沸石对聚二甲基硅氧烷(PDMS)进行填充,以聚偏氟乙烯(PVDF)为支撑层,制备了ZSM-5填充PDMS/PVDF复合膜,用于渗透汽化乙醇/水混合物的分离.研究了沸石填充量、操作温度、进料液浓度对乙醇/水的渗透汽化分离性能的影响,发现该复合膜较文献报道中的沸石填充膜,其渗透通量有了明显的提高,在50℃沸石填充量为40%时,对乙醇的分离因子为11.7,其渗透通量达到749.8 g/(m2.h).随着操作温度的升高或料液中乙醇浓度升高,渗透通量增大,分离因子下降.Zeolite filled polydimethylsiloxane（PDMS） composite membrane was prepared by incorporation of ZSM-5 particles with Si/Al ratio of 360 into PDMS solution which was cast onto polyvinylidene fluoride （PVDF） porous membranes. The resulted zeolite filled PDMS/PVDF composite membranes were applied for the pervaporation of ethanol/water mixtures. The effect of zeolite content, operation temperature and ethanol concentration in feed on pervaporation performance of ethanol/water mixtures was investigated. It was found that the permeation flux was enhanced significantly compared with that reported in literatures. As the zeolite content was 40wt%, the permeation flux reached 749.8 g/（m^2·h） with separation factor of 11.7 at 50℃. As the operation temperature or ethanol concentration in feed increased, the permeation flux increased and the separation factor followed the reversed order.

关 键 词：ZSM-5 聚二甲基硅氧烷(PDMS) 渗透通量 优先透醇 渗透汽化 

分 类 号：TQ028.8[化学工程]