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Citation: Yu Qiquan, Jin Yun, Zhang Fan, Guo Qinlin, Gui Linlin. THE REDOX MECHANISM AND KINETICS OF OXIDATION OF METHANOL OVER Mo-Bi-Ce/SiO₂ CATALYST[J]. Acta Physico-Chimica Sinica, ;1989, 5(06): 699-704. doi: 10.3866/PKU.WHXB19890611 shu

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

1.
Department of Chemistry; Peking University; Institute of Physical Chemistry; Peking University

Received Date: 11 May 1988
Available Online: 15 December 1989

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