Chem. J. Chinese Universities ›› 2002, Vol. 23 ›› Issue (1): 129.

• Articles • Previous Articles     Next Articles

Charaterization of the Phase and Valency State of Co on Co/HZSM-5 Catalysts

ZHANG Qiang, WANG Xiao-Dong   

  1. College of Materials Science and Technology, Beijing University of Chemical Technology, Beijing 100029, China
  • Received:2000-11-21 Online:2002-01-24 Published:2002-01-24

Abstract: The phase and valency state of cobalt species on Co/HZSM-5 catalysts containing 10% to 100% cobalt were characterized by XRD, TPR and DRStechnique. It was found that cobalt species on Co/HZSM-5 may exist in the phases of Co3O4, CoO, CoAl2O4 spinel, exchanged Co or metal Co at different calcination and reduction temperature, and CoAl2O4 spinel is difficult to be reduced.

Key words: Co/HZSM-5 catalyst, Phase state, Valency state, Characterization

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