Acid gas hydrogen sulfide

Sulfur Plant Acid gas (hydrogen sulfide and carbon dioxide) is fed to a sulfur plant, where the hydrogen sulfide is converted to elemental sulfur by partial oxidation with air. 

Sulfur is quite versatile it can be used as an agricultural insecticide or as a raw material for making sulfuric acid, as shown in Figure 2.12. To make sulfur, acid gas (hydrogen sulfide, sulfur dioxide, and carbon dioxide) from the various refinery amine units is collected and fed to a sulfur plant. In a typical sulfur plant, the acid gas is fed to a reaction furnace. The hydrogen sulfide is first partially burned at 2,500° F (1,370° C) and 15 psia (103 kPa) in the reaction furnace to form sulfur dioxide next, it is passed through a waste heat boiler and then passed over catalyst beds at 500°F (260° C) and 15 psia (103 kPa) in the converters. Sulfur is condensed from the effluent of successive converters and solidified in pits. 

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