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BULLETIN OF THE CHINESE CERAMIC SOCIETY ›› 2021, Vol. 40 ›› Issue (5): 1698-1706.

Special Issue: 新型功能材料

• New Functional Materials • Previous Articles     Next Articles

Research Progress of CHA Molecular Sieve Membrane

HUA Shaoqiang, ZHOU Zhihui, WU Hongdan, DU Yijin, ZHANG Jian   

  1. School of Resources and Environmental Engineering, Wuhan University of Science and Technology, Wuhan 430081, China
  • Received:2020-10-31 Revised:2021-01-10 Online:2021-05-15 Published:2021-06-07

Abstract: CHA molecular sieve membranes have been favored by people because of their higher acid stability and better pore structure. The main systhesis methods include the liquid phase deposition, the vapor phase transfer, the microwave synthesis, the secondary growth, and the two-step variable temperature crystallization. Based on the synthesis mechanism, preparation of CHA membrane has there two means: synthesis gel containing structure directing agent (SDA) and SDA-free. The synthesis trend of SDA-free is the future development direction of CHA molecular sieve membranes due to shorter reaction time and better environmental benefits, which is generally to use Sr2+, Cs+, F- or K+ instead of SDA to prepare CHA molecular sieve membranes. This article mainly discusses its synthesis mechanism. Synthetic CHA membranes with SDA are also introduced. At the same time, the flux, selectivity and stability of CHA molecular sieve membranes are reviewed. The application and research status of CHA molecular are discussed, and the future research development of CHA membrane has prospected.

Key words: CHA molecular sieve membrane, structure directing agent, synthetic method, synthesis mechanism, membrane separation

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