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Deactivation of Cu/ZnO/Al2O3 Catalyst: Evolution of Site Concentrations with Time

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Abstract

The reforming of methanol is acknowledged as a convenient means to generate hydrogen for a PEFC due to the low temperature (<280 °C) at which the reaction occurs and the low CO content of the reformate. However, the catalyst is prone to deactivation in the upper range of its operating temperatures. This paper presents a method of analysis in which relative changes in site concentrations are deduced from a series of long-duration rate measurements. The sites involved in the reforming reaction are shown to evolve independently of each other. In particular, concentration of sites for hydrogen adsorption decline at a greater rate than those responsible for the adsorption of oxygenated species. A key process in the deactivation of the catalyst is the decrease in its capacity to adsorb and dissociate hydrogen.

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Authors and Affiliations

  1. epartment of Chemistry and Chemical Engineering, Royal Military College of Canada, Kingston, Ontario, Canada

    C.P. Thurgood, J.C. Amphlett, R.F. Mann & B.A. Peppley

Authors
  1. C.P. Thurgood
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  2. J.C. Amphlett
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  3. R.F. Mann
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  4. B.A. Peppley
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Correspondence to B.A. Peppley.

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Thurgood, C., Amphlett, J., Mann, R. et al. Deactivation of Cu/ZnO/Al2O3 Catalyst: Evolution of Site Concentrations with Time. Topics in Catalysis 22, 253–259 (2003). https://doi.org/10.1023/A:1023680121028

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  • DOI: https://doi.org/10.1023/A:1023680121028

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