Acta Phys. -Chim. Sin. ›› 1989, Vol. 5 ›› Issue (06): 699-704.doi: 10.3866/PKU.WHXB19890611

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THE REDOX MECHANISM AND KINETICS OF OXIDATION OF METHANOL OVER Mo-Bi-Ce/SiO2 CATALYST

Yu Qiquan; Jin Yun; Zhang Fan; Guo Qinlin; Gui Linlin   

  1. Department of Chemistry; Peking University; Institute of Physical Chemistry; Peking University
  • Received:1988-05-11 Revised:1989-05-08 Published:1989-12-15
  • Contact: Yu Qiquan

Abstract: The kinetics of oxidation of methanol to formaldehyde on Mo-Bi-Ce/SiO_2 catalyst has been investigated in an external recirculation gradientless reactor. The kinetic data can be described by a two-stage redox model. The parameters of the kinetic equation were estimated by the linear least square method. The m-order with respect to methanol and n-order with respect to oxygen depended on the reaction temperature and m+n=1 (the sum of m and n is close to 1). The change of reaction order was interpreted by the kinetics of redox mechanism. XPS results which come from different treated catalysts verify the redox mechanism mentioned above.