Chemical Research in Chinese Universities ›› 2022, Vol. 38 ›› Issue (1): 250-256.doi: 10.1007/s40242-021-1420-z

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Synthesis Optimization of SSZ-13 Zeolite Membranes by Dual Templates for N2/NO2 Separation

LI Jun1, RONG Huazhen2, CHEN Cong3, LI Ziyi1, ZUO Jiayu1, WANG Wenjian2, LIU Xinjian1, GUAN Yixing2, YANG Xiong1, LIU Yingshu1, ZOU Xiaoqin2, ZHU Guangshan2   

  1. 1. School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, P. R. China;
    2. Faculty of Chemistry, Northeast Normal University, Changchun 130024, P. R. China;
    3. Science and Technology on Reactor System Design Technology Laboratory, Nuclear Power Institute of China, Chengdu 610213, P. R. China
  • Received:2021-10-17 Revised:2021-11-16 Online:2022-02-01 Published:2021-11-16
  • Contact: LI Ziyi, ZOU Xiaoqin E-mail:ziyili@ustb.edu.cn;zouxq100@nenu.edu.cn
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (Nos.21808012, 21971035), the "111" Project of China(No.B18012), and the Open Project of the National Defense Science and Technology Industry Nuclear Power Technology Innovation Center of China(No.HDLCXZX-2020-HD-005).

Abstract: High-silica SSZ-13 zeolite membranes are promising in industrial separations of light gases and continuous membranes are highly demanded for better separation performances. Herein, pure-phase, continuous and thin SSZ-13 zeolite membranes were synthesized using dual templates of N,N,N-trimethtyl-1-adamantammonium hydroxide(TMAdaOH) and tetraethylammonium hydroxide(TEAOH). Systematical investigations of TMAdaOH/TEAOH ratios and their concentrations show that TMAdaOH acts as the main structure-directing agent in the formation of the SSZ-13 zeolite. TMAdaOH cooperatively plays with TEAOH in promoting the SSZ-13 crystal intergrowth to form a continuous polycrystalline membrane. Additionally, appropriate introduction of TEAOH is able to adjust the membrane thickness to the crystal-comparable size of ca. 2.0 μm. The SSZ-13 membranes are further applied for N2/NO2separation, which is firstly reported on zeolite membranes. The gas permeation results show that the SSZ-13 membrane synthesized by the dual-template approach exhibits selective separation of N2 over NO2 with N2/NO2 separation factor of 7.6 and N2 permeance of 1.66×10-8 mol·m-2·s-1·Pa-1.

Key words: Zeolite membrane, Dual template, SSZ-13, Gas separation, Nitrogen dioxide