高等学校化学学报 ›› 2013, Vol. 34 ›› Issue (4): 771.doi: 10.7503/cjcu20120988

• 研究论文: 无机化学 • 上一篇    下一篇

不锈钢金属网上L型分子筛膜的连续生长及气体渗透性能

张金磊1, 赵晴2, 刘佳1, 孙福兴1   

  1. 1. 吉林大学无机合成与制备化学国家重点实验室, 长春 130012;
    2. 吉林大学中日联谊医院, 长春 130033
  • 收稿日期:2012-10-31 出版日期:2013-04-10 发布日期:2013-03-20
  • 通讯作者: 孙福兴,男,博士,讲师,主要从事金属有机框架材料、微孔材料和膜材料方面的研究.E-mail:fxsun@jlu.edu.cn;赵晴,女,博士,副教授,主要从事膜材料的合成及在医学方面的应用研究.E-mail:qingzhao888@hotmail.com E-mail:fxsun@jlu.edu.cn;qingzhao888@hotmail.com
  • 基金资助:

    国家自然科学基金(批准号:20831002)资助.

Growth and Gas Permeation Properties of Continuous L-type Zeolite Membrane on Stainless Steel Net

ZHANG Jin-Lei1, ZHAO Qing2, LIU Jia1, SUN Fu-Xing1   

  1. 1. State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, Jilin University, Changchun 130012, China;
    2. China-Japan Union Hospital, Jilin University, Changchun 130033, China
  • Received:2012-10-31 Online:2013-04-10 Published:2013-03-20

摘要:

选取不锈钢金属网作为成膜载体, 采用预涂晶种的方法, 研究了L型分子筛晶种在水热条件下二次生长成膜的过程. 对成膜条件进行了详细的考察, 并讨论了反应液的碱度及反应时间对L型分子筛膜形成的影响. 利用扫描电子显微镜(SEM)对L型分子筛膜的形貌进行了表征. 通过优化反应条件, 得到了致密、 连续、 纯相、 均匀的L型分子筛膜, 厚度约为20 μm. 单组分气体渗透测试结果表明, 在室温和常压下, L型分子筛膜对N2气和H2气的渗透速率分别为8.39×10-8 和6.96×10-7 mol·m-2·s-1·Pa-1, 从而计算出膜对H2/N2混合气体的理想分离系数为8.3. 双组分气体渗透测试结果表明, 温度的升高会导致膜对H2气和N2气的渗透速率增加及H2/N2分离系数的减小.

关键词: L型分子筛膜, 反应条件, 气体分离

Abstract:

Growth of L-type zeolite membrane on stainless steel net by the secondary hydrothermal growth was studied under different conditions. The effects of the alkalinity of the reaction solution and the reaction time on the formation of L-type zeolite membrane were discussed via the observation through scanning electron microscopy technique. The continuous uniform phase-pure L-type zeolite membrane was obtained with a thickness of about 20 μm. Single gas permeation measurement on the as-synthesized L-type membrane demonstrates that the permeance of N2 and H2 are 8.39×10-8 and 6.96×10-7 mol·m-2·s-1·Pa-1 respectively, indicating an ideal selectivity for H2/N2 of 8.3. Binary gas permeation measurement demonstrates that the increase of temperature would strengthen the permeation of N2 and H2, but decrease the separation factor of H2/N2.

Key words: L-type zeolite membrane, Reaction condition, Gas separation

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