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Statistical rates for reactions on heterogeneous surfaces: The influence of non-ideal collisions

✍ Scribed by S.D. Prasad; L.K. Doraiswamy

Publisher: Elsevier Science
Year: 1983
Tongue: English
Weight: 439 KB
Volume: 99
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(83)80544-2

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✦ Synopsis

Using the mndom patch model, kinetic expressions arc derived for the pressure dependence of first-and second-order surface reactions_ Collisions beteen gas-phase and adsorbed molecules which affect the desorption probability are taken into account. For firstand second-order reactions a representation for the rates is siven in terms of incomplete gamma functions for three distributions. These collisional effects cause the surface rates to rise steeply in a nxrow ranse of pressure, due to the exponential dependence of the local isotherm on pressure.

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