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-   -   Catalytic reaction, ratio of active to geometrical catalytic surface (http://www.cfd-online.com/Forums/fluent/124199-catalytic-reaction-ratio-active-geometrical-catalytic-surface.html)

mahmohammad September 29, 2013 15:47

Catalytic reaction, ratio of active to geometrical catalytic surface
 
Dear all,

I'm trying to simulate H2/O2 catalytic reaction on Pt. I'm using Fluent coupled with Chemkin to do that. I can do it just fine and I get reasonable results. But when I want to compare it against the experiments, I need to take the experimentally measured active catalyst sites into account. It's done by multiplying an F factor to the calculated rate of reaction at the boundaries with a catalyst. Since I don't have access to the boundary equations and species equations, what is the best way to add the experiment/geometry ratio factor?

I was thinking of multiplying the rate constant by the factor to increase/reduce the rate of the reactions.

Thanks a lot

A CFD free user September 29, 2013 16:01

Quote:

Originally Posted by mahmohammad (Post 454157)
Dear all,

I'm trying to simulate H2/O2 catalytic reaction on Pt. I'm using Fluent coupled with Chemkin to do that. I can do it just fine and I get reasonable results. But when I want to compare it against the experiments, I need to take the experimentally measured active catalyst sites into account. It's done by multiplying an F factor to the calculated rate of reaction at the boundaries with a catalyst. Since I don't have access to the boundary equations and species equations, what is the best way to add the experiment/geometry ratio factor?

I was thinking of multiplying the rate constant by the factor to increase/reduce the rate of the reactions.

Thanks a lot

Hi dude
If you mean to set the value for specific active area in surface reaction which has a unit (1/m), then you can access it from Cell zone condition/ (interest zone)/ reaction/ surface to volume ratio (1/m)
Hope it helps


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