A process for the high selective conversion of the pollutant so2 into sulphur

Abstract

The application discloses a process for high-selectivity conversion of pollutants SO2 into sulfur, which fixes and deeply reduces low-concentration SO2 into H2S through a catalytic removal and deep reduction process; on the basis, H2S is high-selectivity and low-conversion into sulfur through a short-process Claus process combined with a low-temperature catalytic oxidation process, or H2S is high-selectivity and low-conversion into sulfur through a low-temperature catalytic oxidation process by controlling the speed of catalytic regeneration to control the concentration of hydrogen sulfide in a lower range. The process route can realize near-zero emission of pollutants SO2 and production of sulfur with high added value, high selectivity, convenient storage and transportation, realizes high-value resource of pollutants SO2, and does not have problems such as slagging and scaling, and has significant technical and economic advantages compared with the limestone-wet desulfurization, ammonia desulfurization and activated coke desulfurization processes.