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A Kinetics Study of Ortho-Para Hydrogen Conversion

  • R. N. Keeler
  • D. H. Weitzel
  • J. H. Blake
  • M. Konecnik
Part of the Advances in Cryogenic Engineering book series (ACRE, volume 5)

Abstract

Hougen and Watson [1] and Yang and Hougen [2] have developed methods for dealing with the various mechanisms which may be encountered in gaseous reactions catalyzed by solid surfaces in flow reactors. In heterogeneous reactions of this type, the mechanism consists of several consecutive steps (Fig. 1). These are:
  1. 1.

    Diffusion of reactant gases from the main stream through the gaseous surface film to the outer surface of the catalyst particle

     
  2. 2.

    Diffusion of reactant gases through pores of the catalyst to Its Interior surfaces

     
  3. 3.

    Adsorption of reactant gases on the catalyst surface

     
  4. 4.

    The surface reaction

     
  5. 5.

    Desorptlon of product gases from the catalyst surface

     
  6. 6.

    Outward diffusion of product through the pores from the interior surface of the catalyst

     
  7. 7.

    Diffusion of product gases from the surface of the catalyst through the surface film to the main stream of the gas.

     

Keywords

Space Velocity Main Stream Effectiveness Factor Pore Diffusion Film Diffusion 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. 1.
    O. A. Hougen and K.M. Watson, Ind. Eng. Chem., Vol. 35, p. 529 (1943).CrossRefGoogle Scholar
  2. 2.
    K.H. Yang and O. A. Hougen, Chem. Eiag. Prog., Vol. 46, pp. 146–157 (1950).Google Scholar
  3. 3.
    D. H. Weitzel, J, H. Blake, and M. Konecnik, “Flow conversion kinetics of ortho and parahydrogen,”1958 Cryogenic Engineering Conference Proceedings.Google Scholar
  4. 4.
    T. E. Corrigan, Chem. Eng., Vol. 65, pp. 200–201 (1955).Google Scholar
  5. 5.
    B.W. Thiele, Ind. Eng. Chem., Vol. 31, p. 916 (1939).CrossRefGoogle Scholar
  6. 6.
    C. M. Cunningham, D. S. Chapin, and H. L. Johnston, J. Am. Chem. Soc., Vol. 80, p. 2382 (1958).CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media New York 1960

Authors and Affiliations

  • R. N. Keeler
    • 1
  • D. H. Weitzel
    • 1
  • J. H. Blake
    • 1
    • 2
  • M. Konecnik
    • 1
  1. 1.CEL National Bureau of StandardsBoulderUSA
  2. 2.Department of Chemical EngineeringUniversity of ColoradoUSA

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