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Dynamic diffusion and reaction in a porous solid catalyst layer
The overall reaction is A ⇀ B and is far from equilibrium under conditions here. Reactant A adsorbs reversibly over catalyst surface sites S: A + S ⇌ AS. Click here for more information on the model. (opens in new tab)
Also see the Catalyst Pellet desktop simulation on the Download page. See on GitHub, shop plans, photos and publications for the Dynamic Diffusion Reactor, which is used to measure gas composition at the outside and the center of a porous catalyst pellet under dynamic conditions, github.com/RichardHerz/Dynamic-Diffusion-Reactor.
Click the Run button below. Hit the enter key or click out of field after changing inputs.
Select the "slow" rate determining step below: Model 1 (simple) or 2 (self-inhibiting).
Click here for more information (opens in new tab)
See space-time plot of rate, and average rate and conversion at bottom
Enter max inlet A conc:
Enter Thiele Modulus
Enter B out scale factor
Enter cycling period
Enter square duty cycle % on
Average Rate (dimensionless turnover frequency) =
Average Conversion of A =
outer, gas-catalyst interface:
Space-Time plot of reaction rate
inner, sealed surface:
Click the Run button to start. Hit the enter key or click out of field after changing inputs.