![]() ![]() Now consider the first-order reaction in a porous flat plate catalyst pellet so that both external (interphase) and internal (intraphase) transport limitations are encountered. In Section 6.2, it was shown that the concentration of reactant A on the external surface of the catalyst is related to both the mass transfer coefficient, k, and the surface rate constant, ks. ![]() Ĭonsider a first-order reaction occurring on a nonporous flat plate catalyst pellet. As shown previously, the mole balance in a slab is given by. To evaluate the effectiveness factor for a first-order, isobaric, nonisothermal, flat plate catalyst pellet, the material and energy balances must be solved simultaneously. The porosity (i ) and tortuosity (t ) of the flat plate catalyst pellet are then used to calculate the ejfective diffusivities associated with each component according to. Set up the equations necessary to calculate the effectiveness factor for a flat-plate catalyst pellet in which the following isothermal reaction takes place. Flat plate catalyst pellets Develop expressions for the Thiele modulus and the concentration profile of A for the following reversible first-order reaction that takes place in a flat plate catalyst pellet. ![]()
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