CIESC Journal ›› 2014, Vol. 65 ›› Issue (z2): 304-309.DOI: 10.3969/j.issn.0438-1157.2014.z2.045

Previous Articles    

Synthesis and surface modification of ZSM-5 and Fe-ZSM-5 zeolite membranes

LIU Xiufeng, XU Kai, ZHANG Baoquan   

  1. School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
  • Received:2014-05-08 Revised:2014-09-18 Online:2014-12-30 Published:2014-12-30
  • Supported by:

    supported by the National Natural Science Foundation of China (21136008).

ZSM-5和Fe-ZSM-5分子筛膜的合成与表面改性

刘秀凤, 徐凯, 张宝泉   

  1. 天津大学化工学院, 天津 300072
  • 通讯作者: 张宝泉
  • 基金资助:

    国家自然科学基金重点项目(21136008)。

Abstract:

ZSM-5 and Fe-ZSM-5 membranes were synthesized on α-Al2O3 by secondary growth. The organic templates were removed at 450℃ in the flowing air environment. After ZSM-5 and Fe-ZSM-5 membranes were treated with NaOH or NaCO3 solution, the hydrophilicity of the membrane surface could be enhanced, leading to improved permeation flux and separation factor in prevoporation of aqueous ethanol solution. After treated by NaOH for 2 h, the permeation flux of Fe-ZSM-5 membrane could reach to 2.01 kg·m-2·h-1 with the separation factor of 21.0.

Key words: ZSM-5, Fe-ZSM-5, zeolite membrane, aqueous ethanol solution, alkali treatment

摘要:

采用二次生长法在α-Al2O3载体上制备了ZSM-5及Fe-ZSM-5分子筛膜,合成后的ZSM-5和Fe-ZSM-5分子筛膜在450℃温度条件下脱除模板剂,采用NaOH和NaCO3处理ZSM-5和Fe-ZSM-5分子筛膜后,可提高其亲水性,改善了膜层对乙醇水溶液的脱水性能,渗透通量和分离因子均有所提高。其中Fe-ZSM-5分子筛膜经NaOH处理后,渗透通量为2.01 kg·m-2·h-1,分离因子为21.0。

关键词: ZSM-5, Fe-ZSM-5, 分子筛膜, 乙醇水溶液, 碱处理

CLC Number: