【摘要】 采用预吸附溶胶和重复晶化工艺，在多孔不锈钢管外表面制备了ＺＳＭ５分子筛膜，ＳＥＭ观察表明，膜层晶体紧密地相互交联，厚度约２５μｍ，Ｈ２对Ｎ２，Ｏ２和ＣＯ２的分离系数分别是４４８，４２７和５１３，明显超过Ｋｎｕｄｓｅｎ扩散理论选择性数值，而且这些分离系数的差别表明所制备的分子筛膜具有分子筛分效应．更多还原

【Abstract】 ZSM 5 zeolite membrane on the outer surface of porous stainless steel substrate tubes was prepared by pre adsorbing sol and repeatedly crystallization SEM results indicate that the membrane is a dense layer in a fashion of crystalline intergrowth, and with a thickness of 25 μm The permeabilities of H 2, N 2, O 2, and CO 2 through the membrane were 12 89, 2 88, 3 02, and 2 51×10 -9 m 3\5m -2 \5s -1 \5Pa -1 , respectively The ideal selectivities of H 2 to N 2, O 2, and CO 2 were 4 48, 4 27 and 5 13, respectively, which all were over the theory values of Knudsen diffusion The difference of the ideal selectivities indicates the molecular sieving properties of the membrane更多还原