Abstract
The activity of supported palladium catalysts for the combustion of methane has been determined. It has been observed that the activity increases with time on stream irrespective of whether the catalysts are pre-calcined or pre-reduced. Careful re-reduction experiments have shown that the enhanced activity is maintained. It is concluded that the increase in activity with time on stream is not attributable to slow variations in the chemical state of the palladium particles, but to changes in the morphology of the palladium crystallites under reaction conditions. The possible role of dissolved carbon in stabilising the reconstructed crystallites against reduction is discussed.
Similar content being viewed by others
References
H. Davy, Phil. Trans. Roy. Soc. (1817).
R.B. Anderson, K.C. Stein, J.J. Feenan and L.J.E. Hofer, Ind. Eng. Chem. 53 (1961) 809.
J.G. Firth and H.B. Holland, Trans. Farad. Soc. 65 (1969) 1121.
S. Seimanides and M. Stoukides, J. Catal. 98 (1986) 540.
C.F. Cullis, D.E. Keene and D.L. Trimm, Trans. Farad. Soc. 67 (1971) 864.
C.F. Cullis and B.M. Willatt, J. Catal. 83 (1983) 267.
R.F. Hicks, H. Qi, M.L. Young and R.G. Lee, J. Catal. 122 (1990) 280.
R.F. Hicks, H. Qi, M.L. Young and R.G. Lee, J. Catal. 122 (1990) 295.
T.R. Baldwin, Ph.D. Thesis, University of Reading, 1989.
T.R. Baldwin and R. Burch, Applied Catalysis, Part I, submitted.
T.R. Baldwin and R. Burch, Applied Catalysis, Part II, submitted.
R.F. Baddour, M. Modell and R.L. Goldsmith, J. Phys. Chem. 74 (1970) 1787.
M.F. Gillet and S. Channakhone, J. Catal. 97 (1986) 427.
R. Burch, in: Catalysis, R.S.C. Specialist Periodical, eds. G.C. Bond and G. Webb, 7 (1985) 149.
T.P. Chojnacki and L.D. Schmidt, J. Catal. 115 (1989) 473.
J.J. Chen and E. Ruckenstein, J. Phys. Chem. 85 (1981) 1606.
J.J. Chen and E. Ruckenstein, J. Catal. 70 (1981) 233.
R.T. Yang, P.J. Goethel, J.M. Schwartz and C.R.F. Lund, J. Catal. 122 (1990) 206.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Baldwin, T.R., Burch, R. Remarkable activity enhancement in the catalytic combustion of methane on supported palladium catalysts. Catal Lett 6, 131–138 (1990). https://doi.org/10.1007/BF00764062
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF00764062