| 摘要 |
<p>"" A process for the removal of H2S from a feed gas, and the production of sulfur therefrom, is effected by oxidation with oxygen at temperatures between 250.degree. and 450.degree.F. The oxidation is conducted in the presence of an extremely stable oxidation catalyst comprising an oxide and/or sulfide of vanadium supported on a non-alkaline porous refractory oxide. Sulfur deposition and consequent catalyst deactivation are prevented by maintaining the partial pressure of free sulfur in the oxidation reactor below that necessary for condensation. H2, CO, and light hydrocarbons present in the feed gas are not oxidized. Typical uses of the process include the removal of H2S and the production of sulfur from sour natural gases or gases obtained from the gasification of coal. Feed gases which contain SO2 and H2S in mole ratios greater than 0.5, or which contain other gaseous sulfur compounds such as COS, CS2, SO3 and mercaptans, are desulfurized by catalytically converting all such sulfur components to H2S and subsequently removing the H2S from the product gas by catalytic oxidation to elemental sulfur. This two-step catalytic process is especially contemplated for the desuliurization of Claus tail gases.</p> |
