Rate of Oxidation of Sulfur Dioxide on Activated Carbon Surfacest

When a mixed gas of SO2, 02 and H2O is brought into contact with activated carbon, SO2 is oxidized to H2SO4 and accumulates in the, carbon. The amount of H2SO4, into which SO2 was converted, increased with time almost linearly until it reached 10 weight percent of the carbon in SO, base. In the region where the rate of oxidation reaction was constant, the effects of concentration of each gas and of temperature on the rate of reaction were investigated. The rate of the reaction showed a linear relation with SO2 concentration in gas phase when the concentration was less than 0.01", but, after a gradual change, with increasing SO2 con-centration, it became proportional to the square root of SO, concentration until it was over 1.0". The rate of the reaction was also proportional to the square root of concentration of O and H20. The apparent activation energy of this reaction was found to be from- to - kcal/mol. t Adsorption of Sulfur Dioxide on Activated Carbon in Flue Gas Desulfurization Process. III.