Mathematical Modeling of Electrochemical Promotion

We also assume that the rate of consumption of (05 - 5+) on the catalyst surface (due to desorption or reaction) is first order in 0j (or C ) and denote by Ds the effective surface diffusivity (m2/s) of the backspillover species on the catalyst surface. 

One thus obtains the following differential steady-state mass balance for the surface concentration, Ci, of the promoting species  

Recalling that 0i=Q/Cjiraax and defining =z/L, where L is the thickness of the catalyst film, one can write equations (11.16) to (11.18) in the following dimensionless form  

Solution of Equation (11.19) with boundary conditions (11.20) and (11.21) gives  

Note that for small Op and large J values 0i( ) approaches 1 for all J. 

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C.G. Vayenas, and G. Pitselis, Mathematical Modeling of Electrochemical Promotion and of Metal-Support Interactions, I EC Research 40(20), 4209-4215 (2001). 

MATHEMATICAL MODELLING OF ELECTROCHEMICAL PROMOTION AND CLASSICAL PROMOTION... 

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