Mass transfer with heterogeneous and first order homogeneous reaction using the film theory

Abstract

The problem of mass transfer with both first order irreversible homogeneous and an arbitrary heterogeneous reaction has been analyzed using the film theory, subject to the assumption of a linear profile of reactant between the bulk phase and the heterogeneous reaction surface. The enhancement factor is shown to depend on the product of two dimensionless groups. One is analogous to the usual group arising from mass transfer and first order irreversible reaction, and the other is a Damköhler number which describes the transport of the reactant to and reaction on the surface. The result is discussed in the context of solubilization of an insoluble liquid amphiphile by an aqueous surfactant solution. A maximum in the flux enhancement is observed because of the resistances associated with transport of the reactant species to the reaction surface.