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How to apply KINETIC rate equation on walls

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Old   August 28, 2008, 08:07
Default How to apply KINETIC rate equation on walls
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I have a 2-D micro-channel (simplerectangular) with 300 micro-meter width and 3291 micro-meter lenght. The catalyst is loaded on the both walls. At inlet mixture of water & methanol is supplied and due to catalystic wall reaction we get hydrogen and carbon-dioxide at out let. Flow is laminar, diffusion through walls is nigligible.

Now I have a "steam reforming" rate equation with units [mol/(m^2.s)].

How I can apply this kinatic rate equation on walls? I can apply it as a FLUX or as sink/source terms at walls for methanol and hydrogen? (as methanol is consuming and hydrogen is producing)
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