对支撑体预处理、制膜液碱度、晶化温度和晶化时间对NaA型沸石分子筛膜性能的影响进行了综合研究,得出较优的条件是;支撑体采用去离子水浸泡,在90℃条件下晶化5小时,制膜液摩尔组成为Na2O:SiO2:Al2O3:H2O=8:1:0.2:200.SEM表明所合成的NaA型沸石分子筛在支撑体表面紧密排列形成膜层,膜厚约为3μm;NaA型沸石分子筛膜的氢气和氮气的渗透系数几乎不随平均压力变化而改变,其理想分离系数约为5,高于Knudsen扩散值,表明所合成的NaA型沸石分子筛膜具有一定的分子筛分效应.
参考文献
| [1] | Kita H;Horll K;Ohtoshi Y et al.Synthesis of a zeolite NaA membrane for pervaporation of water/organic liquid mixture[J].Journal of Materials Science Letters,1995,14:206. |
| [2] | Olamioto K;Kita H;Kondo M et al.Membrane for liquid mixture separation[P].US:5554286,1996. |
| [3] | Kondo M;Komori M;Kita H et al.Tubular-type pervaporation module with zeolite NaA membrane[J].Microporous Materials,1995,3:565. |
| [4] | Kondo M.;Kita H.;Okamoto K.;Komori M. .TUBULAR-TYPE PERVAPORATION MODULE WITH ZEOLITE NAA MEMBRANE[J].Journal of Membrane Science,1997(1):133-141. |
| [5] | Jafar J J;Budd P M .Separation of alcohol/water mixtures by pervaporation through zeolite A membranes[J].Microporous Materials,1997,12:305. |
| [6] | Aoki K.;Morooka S.;Kusakabe K. .Gas permeation properties of A-type zeolite membrane formed on porous substrate by hydrothermal synthesis[J].Journal of Membrane Science,1998(2):197-205. |
| [7] | Xu Xiaochun;Yang Weishen;Cheng Mojie et al.In situ synthesis of A-type zeolite membrane on alumina support[J].催化学报,1997,18:357. |
| [8] | Xu Xiaochun;Yang Weishen;Liu lie et al.Synthesis of a high-permeance NaA zeolite membrane by microwave heating[J].Advanced Materials,2000,12:195. |
| [9] | Xu Xiaochun;Yang Weishen.Synthesis and gas properties of an NaA zeolite membrane[J].Chemical Communications,2000:603. |
| [10] | 方永浩,杨南如,钱同生.有支撑纯NaA和NaY沸石膜的合成[J].硅酸盐通报,1999(02):29-31. |
| [11] | Gora L;Streletzky K;Thompson R W et al.Study of the crystallization of zeolite NaA by quasi-elastic light-scattering spectroscopy and electron microscopy[J].Zeolites,1997,18:119. |
| [12] | 徐如人;庞文琴;屠昆岗.沸石分子筛的结构与合成[M].长春:吉林大学出版社,1987:8. |
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