Arrhenius porous catalyst

One first-order irreversible chemical reaction occurs within a porous catalyst that exhibits rectangular symmetry. The center of the catalyst corresponds to rj = 0, and the external surface is at = 1. The intrapellet Damkohler number for reactant A is 1, and the Arrhenius number is 8.6. 

Physical transport processes can play an especially important role in heterogeneous catalysis. Besides film diffusion on the gas/liquid boundary there can also be diffison of the reactants (products) through a boundary layer to (from) the external surface of the solid material and additionally diffusion of them through the porous interior to from the active catalyst sites. Heat and mass transfer processes influence the observed catalytic rates. For instance, as discussed previously the intrinsic rates of catalytic processes follow the Arrhenius... 

Fig. 4 Arrhenius plot of a nickel supported catalyst based on porous glass beads with a mean pore diameter of 16.2 nm...

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