Chinese Journal of Catalysis

Chinese Journal of Catalysis ›› 2011, Vol. 32 ›› Issue (2): 362-367.DOI: 10.3724/SP.J.1088.2011.00937

• Research papers • Previous Articles     Next Articles

Synthesis of Hierarchical HZSM-5 Microspheres without Second Template and Their Application in Methane Dehydroaromatization

YANG Jianhua, YU Suxia, HU Huiye, CHU Naibo, LU Jinming, YIN Dehong, WANG Jinqu   

  1. Institute of Adsorption and Inorganic Membrane, State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116012, Liaoning, China
  • Received:2010-09-27 Revised:2010-11-19 Online:2011-01-26 Published:2014-06-25

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Abstract: Hierarchical ZSM-5(ZSM-5-HW) microspheres were synthesized by controlling the hydrothermal conditions without any secondary template. The ZSM-5-HW microspheres with a diameter range of 10–15 μm were constructed by many rod-shaped crystals. N2 adsorption at –196 oC revealed that the ZSM-5-HW zeolite is of both micropore and mesopore structure. The hierarchical Mo/HZSM-5-HW catalyst exhibited higher catalytic activity and stability in methane dehydroaromatization. The initial CH4 conversion and the highest benzene yield were 18.5% and 9.5%, respectively, which are better than that of the conventional Mo/HZSM-5 catalyst. The CH4 conversion and benzene yield was kept at 10.2% and 5.5%, respectively, after running the reaction for 24 h.

Key words: hierarchical structure, ZSM-5 zeolite, secondary template, methane, dehydroaromatization