Kinetics of the catalytic act

We will now successively consider the reactions of decomposition or isomerization, which involve a single reactant and reactions involving two reactants. The surface reaction is assumed to be elementary. 

Kinetic study of reactions with a single reactant This reaction is schematically represented by  

The concentration per surface unit of A absorbed is linked to the ratio of the surface 0 covered by A over the area 5 0 of the adsorption site by the following relation  

The variation in the amount of A absorbed in the gas phase is related to its concentration in the absorbed phase (the adsorption equilibrium being always achieved) by  

The adsorption isotherm of A follows Langmuir law in the presence of gas /, which includes all gases present in the medium A, the reaction products and inert 

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