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The method of volume averaging is used to derive the diffusive mass transfer boundary conditions for transport between the micro-pores (ω-region) and the fluid in the macro-pores (η-region) in a catalyst pellet. In this configuration, the mass jump boundary condition between the homogeneous regions takes the form-nηω·(Dγ∇〈cAγ〉ηγ)+nηω·(εγDω·∇〈cAγ〉ωγ)=Keff〈cAγ〉ωγ,where Keff is the effective reaction...
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