Chemisorption and Surface Reactions in Cooperative Adsorption Systems.

Article abstract of DOI:10.1002/bbpc.19850890215

The kinetics of propylene hydrogenation catalyzed by thermally treated supported platinum catalysts can be described by a Langmuir-Hinshelwood mechanism. The parameter values of the resulting rate equation, however, clearly depend on the coverage of the catalyst surface. Because of the instabilities observed with this reaction, it has to be assumed that lateral interaction of chemisorbed hydrogen and chemisorbed propylene is the main reason for this parameter variation. Using the lattice-gas model and the methods of statistical thermodynamics, straight-forward equations are derived which take into account the influence of this interaction on chemisorption and surface reaction in binary adsystems. The usefulness of these equations for the evaluation of kinetic measurements is demonstrated.