The method of volume averaging is used to derive the diffusive mass transfer boundary conditions for transport between the micro-pores (-region) and the fluid in the macro-pores (-region) in a catalyst pellet. In this configuration, the mass jump boundary condition between the homogeneous regions takes the form
−n · (D∇cA ) + n · (D · ∇cA ) = Keff cA ,
where Keff is the effective reaction rate coefficient at the inter-region. In this study, a closure is derived in order to predict this average jump coefficient as a function of the microstructure of the porous layer and the Thiele modulus. The jump coefficient predicted for three inter-region structures is presented.
- Closure problem,
- Porous media,
- Reaction jump coefficient
Available at: http://works.bepress.com/francisco_j_valdes_parada/10/