Membrane diffusion and flux response (Q5961673)

A linear diffusion-convection equation for the transport of a single chemical component through a membrane is coupled with a linear reaction equation describing interaction of the diffusing chemical reactant with an immobile reactant. Expressions are derived for the flux responses in and out of the membrane, where a given concentration is applied at one side of the membrane while zero concentration is maintained at the other. These fluxes are compared with the fluxes in an experiment in which the imposed boundary concentration at the two faces of the membrane are interchanged.