Chem. J. Chinese Universities ›› 2010, Vol. 31 ›› Issue (1): 130.

• Articles • Previous Articles     Next Articles

Effect of Carburization Temperature on the Preparation and the Catalytic Performance of Molybdenum Carbide in the Dry-methane Reforming(DMR)

CHENG Jin-Min, HUANG Wei*, ZUO Zhi-Jun   

  1. Key Laboratory of Coal Science and Technology, Ministry of Education and Shanxi Province, Institute of Coal Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, China
  • Received:2009-05-14 Online:2010-01-10 Published:2010-01-10
  • Contact: HUANG Wei. E-mail: huangwei@tyut.edu.cn
  • Supported by:

    国家“九七三”计划项目(批准号: 2005CB221204)和国家自然科学基金(批准号: 20676085)资助.

Abstract:

A series of molybdenum carbide catalysts were prepared using 20%CH4-H2 to carburize molybdenum trioxide at different temperatures. The catalysts were characterized using X-ray diffraction(XRD), X-ray photoelectron spectroscopy(XPS) and N2-adsorption. Their catalytic performance was evaluated in the model reaction of the dry-methane reforming(DMR) to synthesis gas. Here, the characteration of bulk and surface Mo2C catalysts and its influence on the catalytic performance were described. The results show that the more pure crystalline phase of β-Mo2C is obtained when the Mo2C catalyst is prepared at carbonization temperature above 700 ℃. The carburization degree was improved and free carbon on the surface was increased with increase of carbonization temperature. The catalyst prepared at carbonization temperature of 800 ℃ shows the best catalytic performance. The result indicated that high carburization degree and the appropriate amount of free carbon on the surface could promote carbonation and oxidation balance of Mo2C catalyst and favor the catalyst activity and stability.

Key words: Molybdenum carbide; Dry-methane reforming(DMR); Carburization temperature

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