METHOD FOR REMOVING SULPHUR COMPOUNDS FROM A RESIDUAL GAS SUCH AS A RESIDUAL GAS FROM A CLAUS PROCESS SULPHUR PLANT, AND RECOVERING SAID COMPOUNDS AS SULPHUR

摘要

A residual gas is processed by hydrogenation and hydrolysis (1) to combine the sulphur compounds into a single compound H2S, cooling (4, 10) to a temperature within a range THETA -180 DEG C, where THETA is the dew point of the water in the gaseous effluent from the hydrogenation and hydrolysis step, and selective catalytic oxidation (2a) of the H2S into sulphur at a temperature within the range THETA -180 DEG C, wherein a sulphur deposit is formed on the catalyst and the sulphur-loaded catalyst is periodically regenerated (2b), followed by cooling of the regenerated catalyst within the range THETA -180 DEG C to enable reuse in the catalytic oxidation step.