After-H2SO4-Making Calculations

Fig. 20.5. 3 - 1 acid plant with one Cs catalyst bed (660 K gas input) and three K, Na catalyst beds (690 and 720 K). Maximum SO2 oxidation is obtained with the Cs catalyst in bed 4, i.e. after H2SO4 making. Bed 3 Oust before H2SO4 making) is nearly as good. The calculations are all based on Table 20.1 s values - except for gas input temperature. 

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