Chromatographia

, Volume 49, Issue 5–6, pp 285–292 | Cite as

Conversions of carbon monoxide oxidation over Pt−Rh alloy catalysts calculated by a new gas chromatographic technique

  • D. Gavril
  • A. Koliadima
  • G. Karaiskakis
Originals

Summary

Catalytic fractional conversions of carbon monoxide to carbon dioxide over Pt−Rh alloy catalysts in the presence of excess oxygen, under steady-state or non steady-state conditions, as well as corresponding rate constants for the CO oxidation reaction were measured by using the reversed-flow gas chromatographic technique. From the variation of the conversions with temperature, maximum values of conversions were found, which depend on the catalysts nature (Pt content), while from the variation of the rate constants with temperature, activation energies for the CO oxidation reaction were determined, which also depend on the catalyst Pt content. The results suggest a synergism between Pt and Rh in the Pt−Rh bimetallic catalysts in accordance with previous works, showing that reversed-flow gas chromatography can be used with simplicity and accuracy for the kinetic study of the CO oxidation reaction, which is of technological importance for the control of air pollution.

Key Words

Gas chromatography Reversed-flow gas chromatography Carbon monoxide oxidation Bimetallic Pt−Rh catalysts 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. [1]
    S. H. Oh, J. E. Carpenter, J. Catal.98, 178 (1986).CrossRefGoogle Scholar
  2. [2]
    Z. Hu, F. M. Allen, C. Z. Wan, R. M. Heck, J. J. Steger, R. E. Lakis, C. E. Lyman, J. Catal.174, 13 (1998).CrossRefGoogle Scholar
  3. [3]
    R. M. Wolf, J. Siera, F. C. M. J. M. van Delft, B. E. Nieuwenhuys, Faraday Discuss. Chem. Soc.87, 275 (1989).CrossRefGoogle Scholar
  4. [4]
    F. C. M. J. M. van Delft, B. E. Nieuwenhuys, J. Siera, R. M. Wolf, ISIJ International,29, 550 (1989).Google Scholar
  5. [5]
    N. A. Katsanos, G. Karaiskakis, in Advances in Chromatography” J. C. Giddings, ed., Marcel Dekker, Inc., New York, 1984, p. 125.Google Scholar
  6. [6]
    D. Vattis, N. A. Katsanos, G. Karaiskakis, A. Lycourgiotis, M. Kotinopoulos, J. Chromatogr.214, 171 (1981).CrossRefGoogle Scholar
  7. [7]
    E. Dalas, N. A. Katsanos, G. Karaiskakis, J. Chem. Soc. Faraday Trans 1,82, 2897 (1986).CrossRefGoogle Scholar
  8. [8]
    N. A. Katsanos, R. Thede, F. Roubani-Kalantzopoulou, J. Chromatogr. A.795, 133 (1998).CrossRefGoogle Scholar
  9. [9]
    D. Gavril, G. Karaiskakis, Instrum. Sci. Technol.25, 217 (1997).Google Scholar
  10. [10]
    D. Gavril, G. Karaiskakis, CHromatographia,47, 63 (1998).CrossRefGoogle Scholar
  11. [11]
    G. Karaiskakis, N. A. Katsanos, A. Lycourghiotis, Can. J. Chem.61, 1853 (1983).CrossRefGoogle Scholar
  12. [12]
    N. A. Katsanos, G. Karaiskakis, A. Niotis, J. Catal.94, 376 (1985).CrossRefGoogle Scholar
  13. [13]
    V. Sotiropoulou, G. P. Vassilev, N. A. Katsanos, H. Metaxa, F. Roubani-Kalantzopoulou, J. Chem. Soc. Faraday Trans 1,91, 485 (1995).CrossRefGoogle Scholar
  14. [14]
    G. Karaiskakis, N. A. Katsanos, A. Niotis, J. Chromatogr.245, 21 (1982).CrossRefGoogle Scholar
  15. [15]
    N. A. Katsanos, G. Karaiskakis, P. Agathonos, J. Chromatogr.349, 369 (1986).CrossRefGoogle Scholar
  16. [16]
    N. A. Katsanos, G. Karaiskakis, J. Chromatogr.237, 1 (1982).CrossRefGoogle Scholar
  17. [17]
    G. Karaiskakis, N. A. Katsanos, A. Niotis, Chromatographia17, 310 (1983).CrossRefGoogle Scholar
  18. [18]
    G. Karaiskakis, N. A. Katsanos, J. Phys. Chem.88, 3674 (1984).CrossRefGoogle Scholar
  19. [19]
    N. A. Katsanos, E. Dalas, J. Phys. Chem.91, 3103 (1987).CrossRefGoogle Scholar
  20. [20]
    A. Koliadima, P. Agathonos, G. Karaiskakis, J. Chromatogr.550, 171 (1991).CrossRefGoogle Scholar
  21. [21]
    Ch. Abatzoglou, E. Iliopoulou, N. A. Katsonos, F. Roubani-Kalantzopoulou, A. Kalantzopoulos, J. Chromatogr.775, 211 (1997).CrossRefGoogle Scholar
  22. [22]
    P. Agathonos, G. Karaiskakis, J. Appl. Polym. Sci.,37, 2237 (1989).CrossRefGoogle Scholar
  23. [23]
    G. Karaiskakis, A. Niotis, N. A. Katsanos, J. Chromatogr. Sci.22, 554 (1984).Google Scholar
  24. [24]
    G. Karaiskakis, J. Chromatogr. Sci.23, 360 (1985).Google Scholar
  25. [25]
    D. Gavril, N. A. Katsanos, G. Karaiskakis, submitted for publication.Google Scholar
  26. [26]
    A. Baiker, M. Maciejewski, S. Tagliaferri, P. Hug, J. Catal.151, 407 (1995).CrossRefGoogle Scholar

Copyright information

© Friedr. Vieweg & Sohn Verlagsgesellschaft mbH 1999

Authors and Affiliations

  • D. Gavril
    • 1
  • A. Koliadima
    • 1
  • G. Karaiskakis
    • 1
  1. 1.Department of ChemistryUniversity of PatrasPatrasGreece

Personalised recommendations