Chinese Journal of Catalysis

Chinese Journal of Catalysis ›› 2006, Vol. 27 ›› Issue (4): 319-323.

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H2-TPR Study on Mo/HZSM-5 Catalyst for CH4 Dehydroaromatization

LIU Hongmei2, XU Yide1*   

  1. 1 State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, The Chinese Academy of Sciences, Dalian 116023, Liaoning, China; 2 Key Laboratory of Organic Optoelectronics and Molecular Engineering of Education Ministry, Department of Chemistry, Tsinghua University, Beijing 100084, China
  • Received:2006-04-25 Online:2006-04-25 Published:1984-12-26

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Abstract: Temperatured-programmed reduction (TPR) of hydrogen was used to investigate the reducibility of Mo species on Mo/HZSM-5 catalysts prepared by different methods, and the possible six H2-consumption peaks were assigned precisely with the help of 1H MAS NMR. The TPR peaks corresponding to the reduction of Mo species associated with Bronsted acid sites were first identified. In addition, the catalytic performance of various Mo-based catalysts was studied for methane dehydroaromatization. The Mo species that is located in the channels of HZSM-5 zeolite and associated with Bronsted acid site is more active and stable for the formation of one-ring aromatics in the methane dehydroaromatization.

Key words: methane, dehydroaromatization, molybdenum, HZSM-5, temperature-programmed reduction