Journal of Inorganic Materials ›› 2021, Vol. 36 ›› Issue (6): 579-591.DOI: 10.15541/jim20200555

Special Issue: 【虚拟专辑】分离膜,复相陶瓷(2020~2021)

• REVIEW • Previous Articles     Next Articles

Synthesis and Gas Separation of Chabazite Zeolite Membranes

LI Ziyi1(), ZHANG Jiajia1, ZOU Xiaoqin2, ZUO Jiayu1, LI Jun1, LIU Yingshu1(), PUI David Youhong3,4   

  1. 1. School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China
    2. Institute of Chemistry, Northeast Normal University, Changchun 130024, China
    3. School of Science and Engineering, The Chinese University of Hong Kong, Shenzhen 518172, China
    4. Department of Engineering, University of Minnesota, Minneapolis 55455, USA
  • Received:2020-09-22 Revised:2020-10-27 Published:2021-06-20 Online:2020-12-10
  • Contact: LIU Yingshu, professor. E-mail: ysliu@ustb.edu.cn
  • About author:LI Ziyi(1990-), male, associate professor. E-mail: ziyili@ustb.edu.cn
  • Supported by:
    National Natural Science Foundation of China(21808012);Fundamental Research Funds for the Central Universities(FRF-IDRY-19-025)

Abstract:

Chabazite (CHA) zeolite membranes exhibit superior performances in light gas separations owing to the eight-membered ring channel structure with small pore size (0.38 nm), adjustable surface characteristics, and high material stability and preparation reproducibility, and have gradually become one of the hot spots of zeolite membrane research in recent years. This review article first introduces the basic characteristics, the two typical CHA zeolite membranes (SAPO-34 and SSZ-13 membranes), then compares the synthesis and preparation methods of CHA zeolite membranes (in-situ synthesis, secondary growth synthesis, microwave heating methods) and analyzes their advantages and disadvantages in application status. The influences of their key synthesis conditions of the secondary growth as the mainstream synthesis method on the qualities of SSZ-13 and SAPO-34 membranes have been elaborated in detail, mainly including 1) the seeding conditions, such as carrier type, seeding crystal and seeding approach; 2) the hydrothermal synthesis conditions, such as crystallization time and temperature, water content, silica-to-alumina ratio, structure directing agent, and cation type; 3) the calcination approaches, such as conventional calcination, staged calcination, and rapid heating treatments. After comparative analysis, the preferred synthesis of the above two typical CHA zeolite membranes are proposed. Furthermore, the modulation of membrane surface chemistry is discussed for the enhancement in gas separation, such as silica-to-alumina ratio adjustment, ion exchange, heteroatom substitution, amino-group functionalization, and surface modification. The detailed characteristics of gas separation in various gas mixture systems and the permeation properties of different single gases on CHA zeolite membranes are analyzed and summarized as well. Finally, the future development of CHA zeolite membranes is prospected.

Key words: zeolite membrane, chabazite, synthesis, surface chemistry modulation, gas separation, review

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