Gas desulfurization
Abstract
Abstract A PROCESS FOR REMOVING SULFUR COMPOUNDS FROM SULFUR PLANT TAIL GASES COMPRISING SO2, COS, CS2, ENTRAINED AND VAPORIZED S, AND H2S WHICH COMPRISES: (A) OXIDIZING THE TAIL GAS STREAM TO CONVERT COS, CS2 AND ENTRAINED AND VAPORIZED S TO SO2 AND CO2, AND THEREBY OBTAIN AN OXIDIZED GAS STREAM COMPRISING SO2 AND CO2, (B) FEEDING THE OXIDIZED GAS STREAM TO A HYDROGENATING ZONE AND THEREIN HYDROGENATING THE OXIDIZED GAS STREAM BY A PROCESS WHICH COMPRISES CONTACTING THE OXIDIZED GAS STREAM WITH A HYDROGENATION CATALYST AT A TEMPERATURE BETWEEN 400* AND 900*F., AND IN THE PRESENCE OF HYDROGEN GAS TO OBTAIN A HYDROGENATED GAS STREAM (C) SCRUBBING H2S AND CO2, (C) SCRUBBING H2S FROM THE HYDROGENATED GAS STREAM TO OBTAIN A PURIFIED STREAM. IT IS PARTICULARLY PREFERRED TO MAINTAIN AT LEAST 0.4 MOLE H2O IN THE OXIDIZED GAS STREAM FED TO THE HYDROGENATION ZONE PER MOLE OF SAID OXIDIZED GAS STREAM IN ORDER TO MAINTAIN THE COS CONCENTRATION IN THE EFFLUENT FROM THE HYDROGENATION ZONE AT A VERY LOW PART PER MILLION LEVEL.
Inventors
- 👤 J Merrill
Bibliographic Details
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