Chinese Journal of Catalysis ›› 2016, Vol. 37 ›› Issue (8): 1381-1388.DOI: 10.1016/S1872-2067(15)61099-3

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Hydrothermal synthesis of nanosized ZSM-22 and their use in the catalytic conversion of methanol

Lei Chena,b, Peng Lua,b, Yangyang Yuana, Li Xua, Xiaomin Zhanga, Lei Xua   

  1. a. Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, China;
    b. University of Chinese Academy of Sciences, Beijing 100049, China.
  • Received:2016-01-30 Revised:2016-03-15 Online:2016-07-29 Published:2016-08-01
  • Contact: Xiaomin Zhang, Lei Xu
  • Supported by:

    This work was supported by the National Natural Science Foundation of China (21506202).

Abstract:

ZSM-22 zeolite with different crystal lengths was prepared using a modified hydrothermal method. Rotation speed, Si/Al molar ratio and co-solvent have important effects on the crystal size of ZSM-22. The nanosized zeolite samples were characterized by X-ray diffraction, X-ray fluorescence, nitrogen adsorption, scanning electron microscopy, temperature-programmed desorption of ammonia and solid state nuclear magnetic resonance. The catalytic performance of nanosized ZSM-22 was tested using the conversion of methanol. Compared to conventional ZSM-22, the nanosized ZSM-22 zeolite exhibited superior selectivity to ethylene and aromatics and lower selectivity to propylene. Stability against deactivation was clearly shown by the nanosized ZSM-22 zeolite. A higher external surface area and smaller particle size make this nanosized ZSM-22 zeolite attractive for catalytic applications.

Key words: Nanosized ZSM-22 zeolite, Hydrothermal synthesis, Conversion of methanol