Rate of Oxidation of Sulfur Dioxide on Activated Carbon Surfacest

Abstract

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.