Transport and Reaction in Porous Catalysts

Given the transport fluxes for all species inside the catalyst particle, as modeled in Section 3.4.3. a steady-state mass balance considering the simultaneous transport and chemical reaction gives 

In the packed-bed reactor, the molar concentrations and temperature at the exterior of the catalyst particle are coupled to the respective fluid-phase concentrations and temperature through the interfacial fluxes given in Eqs. (3.3-1) and (3.3-2). Overall mass and heat transfer coefficients are often used to describe these interfacial fluxes, similar in structure to Eqs. (3.2-1) and (3.2-2). Complete solution of the packed-bed reactor model 

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