Theoretical and Experimental Chemistry

, Volume 14, Issue 4, pp 410–413 | Cite as

Analysis of the stationary kinetic characteristics of an n-stage unbranched catalytic reaction (linear mechanism)

  • G. S. Yablonskii
  • V. I. Bykov
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Conclusions

We shall discuss what differences the “complexity” (n-stage character) brings into the kinetic characteristics of the “simplest” case examined by us: an unbranched cycle, linear with respect to the intermediate substances. In the range in which the reaction proceeds in the forward direction the temperature dependence for an exothermal complex reaction is identical to that for a simple reversible exothermal stage [1]. For a complex endothermal reaction are possible characteristics which are analogous to an elementary endothermal stage: a monotonic dependence, but also a novel property may appear: an extreme (no more than one) due to the strong hidden endothermal character. As was proved in the present study, the action of the partial pressures of the reactants is analogous to their effect on the rate of an elementary reaction: monotonic functions. The difference consists in that here in most cases a limiting rate exists as a result of, for example, the circumstance that the detailed mechanism embraces stages in which no gas phase participates.

Consequently, we classified the typical stationary kinetic characteristics of an n-stage unbranched catalytic reaction with a mechanism linear with respect to the intermediate products. The results obtained in our study can be easily extended to other cases, too, when the kinetic equations are of the shape (1), for example, to some empirical equations.

Keywords

Partial Pressure Kinetic Equation Catalytic Reaction Intermediate Product Monotonic Function 

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Literature cited

  1. 1.
    G. S. Yablonskii and V. I. Bykov, “Temperature dependences of the stationary rate of an n-staged single-pathway catalytic reaction,” Teor. Eksp. Khim., 14, No. 4, 467–473 (1978).Google Scholar
  2. 2.
    G. S. Yablonskii and V. I. Bykov, “Simplified description of the kinetic equation for an n-stage unbranched catalytic reaction,” Dokl. Akad. Nauk SSSR, 233, No. 4, 642–645 (1977).Google Scholar
  3. 3.
    N. I. Kol'tsov and S. L. Kiperman, “Analysis of the variations of the reaction rate with different kinetic model shapes,” Teor. Eksp. Khim., 12, No. 6, 789–795 (1976).Google Scholar

Copyright information

© Plenum Publishing Corporation 1979

Authors and Affiliations

  • G. S. Yablonskii
    • 1
  • V. I. Bykov
    • 1
  1. 1.Institute of CatalysisSiberian Branch of the Academy of Sciences of the USSRNovosibirsk

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