Selective hydrogenation of propyne over supported copper catalysts: influence of support

J. T. Wehrli*, D. J. Thomas, M. S. Wainwright, D. L. Trimm, N. W. Cant

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    45 Citations (Scopus)

    Abstract

    The selective hydrogenation of propyne over copper powder and various supported copper catalysts has been examined in a dynamic flow system. Increased hydrogenation activities were found for supported copper catalysts, where for example, the turnover frequency over an ion-exchanged Cu/SiO2 catalyst was 3.5·10-2 s-1 at 140°C as compared to 1.1·10-3 s-1 over unsupported copper powder. The increased selectivity to propene with increasing temperature was found to be a general property of all copper catalysts. However, the exact pattern of activity and selectivity was found to depend upon the particular supported copper system. Deactivation was found to depend on the acidity of the support and the dispersion of copper. Overall, the most active and selective catalysts that deactivate least were copper on silica prepared by the ion-exchange technique and copper on magnesia.

    Original languageEnglish
    Pages (from-to)253-262
    Number of pages10
    JournalApplied Catalysis
    Volume70
    Issue number1
    DOIs
    Publication statusPublished - 1991

    Keywords

    • ageing
    • alkynes
    • copper
    • kinetics.
    • propyne hydrogenation
    • support effects

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