摘要
采用预吸附溶胶及原位水热合成方法，在多孔陶瓷管表面制备了ＺＳＭ－５沸石膜．Ｘ—光衍射测定表明陶瓷基质表面的膜层是纯ＺＳＭ－５沸石晶相；ＳＥＭ结果显示经多次重复合成的沸石膜层晶体相互交连，形成一种连续的多晶层，厚度约３０μｍ．Ｈ２／Ｎ２理想分离因子从原来陶瓷管基质的２．３２提高到３．６１，接近Ｋｎｕｄｓｅｎ扩散水平．
ZSM 5 zeolite membranes were prepared using novel route, a pre absorbing sol by in situ hydrothermal synthesis on porous ceramic tabes. X ray diffraction confirmed the thin layer on the surface of ceramic tubes to be pure ZSM 5 crystalline phase, and SEM showed that individual ZSM 5 crystals had grown together in three dimensions and formed a continuous polycrystalline layer with thickness of about 30 μm. The ideal selectivities for H 2 over N 2 was significantly increased from 2.32 of the ceramic substrate to 3.61 of the zeolite membrane, which was close to the range of Knudsen diffusion.
出处
《中山大学学报（自然科学版）》
CAS
CSCD
北大核心
1997年第4期57-60,共4页
Acta Scientiarum Naturalium Universitatis Sunyatseni
基金
国家自然科学重点基金
