Acta Phys. -Chim. Sin. ›› 2001, Vol. 17 ›› Issue (07): 655-658.doi: 10.3866/PKU.WHXB20010717

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Partial Oxidation of Methanol to Hydrogen over Cu/Zn and Cu/Zn/Ni Catalysts

Xi Jing-Yu;Lv Gong-Xuan;Wang Zhi-Fei   

  1. State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Instit ute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000
  • Received:2000-11-14 Revised:2001-02-27 Published:2001-07-15
  • Contact: Lv Gong-Xuan E-mail:gxlu@ns.lzb.ac.cn

Abstract: Catalytic generation of hydrogen by the coupling of decomposition and partial oxidation of methanol over Cu/Zn and Cu/Zn/Ni catalysts have been studie d. These Cu-Zn based catalysts show high activity and stability for the partial oxidation of methanol. The catalytic activity and selectivity are affected by t he ratio of O2/CH3OH. The optimum reaction conditions for Cu-Zn catalyst are O2 /CH3OH=0.2, T=523 K. The formation of CuZn alloy was observed in the deactivated Cu/Zn catalysts after methanol decomposition at 523 K for 20 h. On the contrary , no CuZn alloy was found in the used Cu/Zn catalyst after partial oxidation of methanol for 150 h at 523 K. The presented results seem to indicate that the for mation of CuZn alloy is one of the main reasons for the deactivation of Cu-Zn b ased catalysts in methanol decomposition.

Key words: Methanol, Hydrogen, Decomposition, Partial oxidation, Cu/Zn catal yst,  Cu/Zn/Ni catalyst