Heatup paths catalyst degradation

Fig. 12.7. Equilibrium curves, heatup paths and intercepts for 12 volume% S02 feed gas. 690 K feed gas gives a 915 K intercept temperature, in the catalyst degradation range. 660 K feed gas gives a 900 K intercept temperature, avoiding degradation.

Fig. 12.8. Heatup path, equilibrium curve and intercept for 660 K, 13 volume% S02 feed gas. With 13 volume% S02 and higher, catalyst degradation is likely even with 660 K feed gas. 660 K is about the lowest temperature at which V, alkali metal, S, 0, Si02 catalyst is fully active.

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See also in sourсe #XX -- [ ]

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