无模板剂ZSM-5沸石膜在乙酸乙酯渗透汽化脱水中的应用  

Pervaporation Dehydration of Template-Free ZSM-5 Zeolite Membrane in Ethyl Acetate

作　　者：金鸽[1] 周志辉[1] 刘红[1] 吴建雄[1] 郭大鹏[1] 王金渠[2] 

机构地区：[1]武汉科技大学冶金矿产资源高效利用与造块湖北省重点实验室,湖北武汉430081 [2]大连理工大学精细化工国家重点实验室,辽宁大连116023

出　　处：《石油学报（石油加工）》2015年第1期31-37,共7页Acta Petrolei Sinica(Petroleum Processing Section)

基　　金：湖北省教育厅基金项目(Q20121112)资助

摘　　要：采用二次生长法,以α-Al2O3为载体,制备无模板剂ZSM-5沸石膜,并用异丙醇-水体系表征膜的渗透汽化性能。通过优化膜合成液的Si/Al摩尔比、晶种浓度、晶化次数、晶化时间以及F/Si摩尔比,制备得到具有高渗透汽化性能的ZSM-5沸石膜。将此沸石膜用于乙酸乙酯脱水实验,考察了操作温度对其渗透汽化脱水性能的影响。结果表明,采用优化条件制备的超亲水性无模板剂ZSM-5沸石膜,在70℃时,对质量分数90%的异丙醇水溶液的渗透通量和分离因数可分别达0.358kg/(m2·h)和10338;对97%的乙酸乙酯水溶液进行渗透汽化脱水,渗透通量可达0.287kg/(m2·h),分离因数可达3790。The secondary growth method was used to synthesize template-free ZSM-5 zeolite membrane on the surface ofα-Al2O3 support tube.The pervaporation performance of the membrane in isopropanol-water system and the effects of synthesis conditions,such as the molar ratio of Si/Al,seed concentration and the molar ratio of F/Si in the synthesis liquid,and the number of crystallizations,the crystallization time on pervaporation performance of the membrane were investigated to obtain the optimal preparation condition. The ethyl acetate dehydration by synthesized ZSM-5 membrane was carried out and the influence of operating temperature on pervaporation performance of the membrane was studied.The results indicated that the flux and separation factor of the super-hydrophilic template-free ZSM-5zeolite membrane synthesized under the optimized condition reached 0.358kg/（m^2·h）and 10338,respectively,for isopropanol-water feed with 90% mass fraction of isopropyl,and 0.287kg/（m^2·h）and 3790,respectively,for the feed with 97% mass fraction of ethyl acetate at 70℃.

关 键 词：无模板剂 ZSM-5沸石膜 乙酸乙酯脱水 渗透汽化 

分 类 号：TQ028.8[化学工程]