MODELING OF ADSORPTION AND KINETICS IN CATALYSIS OVER INDUCED NONUNIFORM SURFACES - SURFACE ELECTRONIC GAS-MODEL

Several aspects of adsorption and reaction kinetics in catalysis over induced nonuniform surfaces are considered. They are discussed in term s of the surface electronic gas model, which accounts for the case of inhomogeneous surface. The adsorption equilibrium of gas mixtures was described, and adsorption isotherms were obtained. The reaction rate f or the two-step sequence was deduced, and for that scheme the problems of optimum catalyst and metal-support interactions were considered. S tructure sensitive and insensitive reactions with nonuniformly reactiv e adsorbates are also discussed in terms of the surface electronic gas model using the Polanyi parameter. The procedure for the rate law com putation is given. Examples include a reaction graph with a pendent ve rtex and irreversible deactivation and reaction mechanisms with nonlin ear elementary steps.