期刊
CHINESE JOURNAL OF CATALYSIS
卷 37, 期 8, 页码 1381-1388出版社
SCIENCE PRESS
DOI: 10.1016/S1872-2067(15)61099-3
关键词
Nanosized ZSM-22 zeolite; Hydrothermal synthesis; Conversion of methanol
资金
- National Natural Science Foundation of China [21506202]
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. (C) 2016, Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. All rights reserved.
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