Abstract
A rate equation for water-gas shift reaction over a high-temperature shift catalyst (Fe/sub 2/O/sub 3/-Cr/sub 2/O/sub 3/) has been developed. This rate equation accounts for the effects of temperature, pressure, age of the catalyst, and H/sub 2/S content of the reacting gases on the catalyst behavior. The effect of diffusion of reactants and products inside the catalyst pores has also been considered. Subsequently, this rate equation has been used in a mathematical model developed for design and simulation calculation of high-temperature water-gas shift reactors. Agreement between experimental data and the calculated results is generally very good.
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