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›› 2007, Vol. 7 ›› Issue (1): 71-74.

• 反应与分离 • 上一篇    下一篇

纳米晶种涂层法合成Silicalite-1沸石膜

孔春龙,王金渠,鲁金明,陶凯   

  1. 大连理工大学精细化工国家重点实验室，吸附与无机膜研究所
  • 出版日期:2007-02-20 发布日期:2007-02-20

Synthesis of Silicalite-1 Zeolite Membrane by Nanocrystal Seed Coating Method

KONG Chun-long,WANG Jin-qu,LU Jin-ming,TAO Kai   

  1. Institute of Adsorption and Inorganic Membrane, State Key Laboratory of Fine Chemicals of Dalian University of Technology
  • Online:2007-02-20 Published:2007-02-20

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摘要： 用纳米晶种涂层二次生长成膜法在大孔a-Al2O3(孔径4~6 mm)陶瓷管上合成Silicalite-1沸石膜. 用X射线衍射(XRD)和扫描电镜(SEM)表征分析了沸石膜的形态，并通过单组分气体渗透实验对合成膜管的渗透性能进行了测试. 结果表明，合成的Silicalite-1沸石膜连续、互生，看不出晶间孔；沸石膜层厚8~10 mm；常温常压下H2/N2的理想分离系数为3.9，超过其努森扩散值3.74，H2/C3H8的理想分离系数为19.1，远大于其Knudsen扩散比值4.69，且H2的渗透率达到1.43′10-6 mol/(m2×s×Pa). 气体分离数据表明，该膜没有明显的缺陷存在.

关键词: Silicalite-1, 沸石膜, 二次生长, 气体渗透

Abstract: The Silicalite-1 zeolite membrane was prepared by secondary synthesis on the porous a-Al2O3 support. The samples were characterized by XRD and SEM, and the permeant selectivity of the membrane was characterized by single-gas at room temperature. The results showed that the membrane re-grew, its thickness was about 8~10 mm and the ideal separation factors were 3.9 for H2/N2 and 19.1 for H2/C3H8 at room temperature, respectively, which are larger than the Knudsen diffusion ratios 3.74 for H2/N2 and 4.69 for H2/C3H8, the permeation rate of H2 was 1.43′10-6 mol/(m2×s×Pa). The data of gas permeation indicated that the membrane was defect-free.

Key words: Silicalite-1, zeolite membrane, secondary synthesis, gas permeation