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Study of Catalytic Methane Oxidation Over Pd Supported on Nanocrystalline CeO2: Effects of Calcination and Pd Loading

Published online by Cambridge University Press:  21 March 2011

Seung H. Oh ,
Michael L. Everett ,
Gar B. Hoflund ,
Johannes Seydel  and
Horst W. Hahn
Seung H. Oh
Affiliation:
Department of Chemical Engineering, University of Florida, Gainesville, FL 32611, USA
Michael L. Everett
Affiliation:
Department of Chemical Engineering, University of Florida, Gainesville, FL 32611, USA
Gar B. Hoflund
Affiliation:
Department of Chemical Engineering, University of Florida, Gainesville, FL 32611, USA
Johannes Seydel
Affiliation:
Darmstadt University of Technology, FB 21-Materials Science Department, Thin Film Division, Petersenstrasse 23, 64287 Darmstadt, GERMANY
Horst W. Hahn
Affiliation:
Darmstadt University of Technology, FB 21-Materials Science Department, Thin Film Division, Petersenstrasse 23, 64287 Darmstadt, GERMANY
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Abstract

The catalytic oxidation of methane was studied over palladium supported on nanocrystalline ceria. Three palladium weight loadings (1, 5, and 10 wt%) were tested after calcining at 500 °C, at 280 °C and after no calcination at all. For the 5 and 10 wt% loadings, the 280 °C-calcined and non-calcined catalysts exhibit enhanced activity after several heating and cooling cycles. Calcining these same catalysts at 500 °C results in a systematic decline in activity. For all pretreatments the 1 wt% Pd catalyst exhibits decreasing activity. For the 5 and 10 wt% Pd loadings, the non-calcined catalysts are more active than the 280 °C-calcined catalysts, which are more active than the 500 °C-calcined catalysts. For the 1 wt% Pd catalyst, the opposite is true. The catalyst activity improves as the Pd loading is increased.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 676: Symposium Y – Synthesis, Functional Properties and Applications of Nanostructures , 2001 , Y4.6
Copyright
Copyright © Materials Research Society 2001

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References

REFERENCES

1. Hillermann, B., Chem. Eng. News 67, 25 (1982).Google Scholar
2. Crabtree, R. H., Proc. 3rd Int. Natural Gas Conversion Symp., Sydney, July 4-9, 1983, Stud. Surf. Sci. Catal., 81, 85 (1984).Google Scholar
3. Fowler, T., Lander, D., and Broomhall, D., Fuel, 70, 499 (1992).Google Scholar
4. Oh, S. H., Mitchell, P. J., and Siewart, R. M., J. Catal., 132, 287 (1991).Google Scholar
5. Siewart, R. M., and Mitchell, P. J., Eur. Pat. 0468556 A1 (1991).Google Scholar
6. Burch, R., and Loader, P. K., Appl. Catal. B, 5, 149 (1994).Google Scholar
7. Hoflund, G. B., Li, Z. -H., Epling, W. S., Gobel, T., Schneider, P., and Hahn, H. W., React. Kinet. Catal. Lett., 70, 97 (2000).Google Scholar
8. Li, Z. -H., and Hoflund, G. B., React. Kinet. Catal. Lett., 66, 367 (1999).Google Scholar
9. Hoflund, G. B., Li, Z. -H., Campbell, T. J., Epling, W. S., and Hahn, H. W., Proc. Fall 1999 MRS Meet.: Nanophase and Nanocomposite Materials III, edited by Komarneni, S., Parker, J. C., and Hahn, H. W., 581, 449 (2000).Google Scholar
10. Epling, W. S., and Hoflund, G. B., J. Catal., 182, 5 (1999).Google Scholar