Reaction Kinetics and Catalysis Letters

, Volume 49, Issue 2, pp 251–259 | Cite as

Thermal desorption from discretely heterogeneous surfaces with account for diffusion between various surface regions

  • V. I. Savchenko


Calculations for a discretely heterogeneous surface consisting of patches s1 and s2 with different adsorption heats of particles, Aads have been made. The calculated data show that under equilibrium distribution of particles between s1 and s2 the desorption rate over route II: s1* Aads → s2* Aads → Agas considerably increases compared to the “direct” desorption over route I: s1* Aads → Agas. This effect is ascribed to the entropy variations of adsorbed layers on patches s1 and s2.


Entropy Physical Chemistry Catalysis Surface Region Adsorbed Layer 
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Copyright information

© Akadémiai Kiadó 1993

Authors and Affiliations

  • V. I. Savchenko
    • 1
  1. 1.Boreskov Institute of CatalysisNovosibirskRussia

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