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›› 2008, Vol. 8 ›› Issue (1): 187-191.

• 材料工程专栏 • 上一篇    下一篇

真空晶种引入法制备Silicalite-1沸石膜及其性能表征

王爱芳,孙伟国,孔春龙,赵庆宇,杨建华,王金渠   

  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:2008-02-20 发布日期:2008-02-20

Synthesis of Silicalite-1 Zeolite Membrane with Vacuum Seeding Method and Its Characterization of Performance

WANG Ai-fang,SUN Wei-guo,KONG Chun-long,ZHAO Qing-yu,YANG Jian-hua,WANG Jin-qu   

  1. Institute of Adsorption and Inorganic Membrane, State Key Laboratory of Fine Chemicals of Dalian University of Technology
  • Online:2008-02-20 Published:2008-02-20

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摘要： 采用抽真空法在多孔a-Al2O3载体管表面预先引入Silicalite-1沸石晶种，再通过水热合成二次晶化法在涂有Silicalite-1沸石晶种的a-Al2O3载体管上合成沸石膜. 用X射线衍射(XRD)、扫描电镜(SEM)和透射电镜(TEM)对合成的沸石分子筛及膜进行了表征，考察了晶种大小、真空度对合成沸石膜渗透性能的影响，用单组分气体渗透实验检测合成沸石膜的渗透性能. XRD检测结果表明，制备的沸石膜是典型的Silicalite-1沸石膜，合成的分子筛粒径分别约为0.2, 0.5, 1和2 mm，且分布均匀；SEM检测结果表明引入的晶种涂层连续、均匀，制备的Silicalite-1沸石膜致密、互生，不存在裂缺；常温常压下，H2/N2和H2/SF6的理想分离系数分别达到4.1和133.2，大于其Knudsen扩散比值3.7和8.7.

关键词: Silicalite-1沸石膜, 抽真空法, 水热合成, 气体渗透

Abstract: Silicalite-1 zeolite membrane was successfully synthesized on tubular a-Al2O3 support by secondary synthesis with vacuum seeding. The as-prepared seed and membrane were characterized by XRD, SEM, TEM and single-gas permeability measurement. The results indicate that the prepared membrane was a typical Silicalite-1, a continuous and uniform seeding layer was attached to the a-Al2O3 support, the sizes of the Silicalite-1 molecular sieve were 0.2, 0.5, 1 and 2 mm with uniform distribution, and the prepared membrane was dense, regrown and crack-free. The influencial factors of vacuum and seed size were also investigated. At ro

Key words: Silicalite-1 zeolite membrane, vacuum seeding, hydrothermal synthesis, gas permeation