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US 2009/0010834 A1Published application
Process for the Thermal Reduction of Sulfur Dioxide to Sulfur
AssigneeWorleyparsons Group, Inc.
InventorMahin Rameshni
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Abstract
Processes for the thermal reduction of sulfur dioxide to elemental sulfur are described and disclosed. The processes described include three general reaction sections, including the reaction furnace portion where the SO2-containing stream is combusted, the hydrogenation portion wherein the effluent from the reaction furnace is hydrogenated over an appropriate catalyst, and a Claus conversion portion, wherein residual H2S and SO2 are further reacted to produce additional elemental sulfur.
Claims20
A process for the production of sulfur from sulfur dioxide (SO2)-containing effluent streams, the process comprising:
- contacting an oxygen-containing gas stream with a sulfur dioxide-containing gas stream and a hydrocarbon gas stream in a reaction furnace for a period of time sufficient to produce a reducing gas effluent stream comprising hydrogen sulfide (H2S) and hydrogen gas;
- contacting the reducing gas effluent stream from the reaction furnace with an activated catalyst in a first reaction zone comprising a catalyst system at a temperature effective for the reaction between hydrogen sulfide and sulfur dioxide to generate a product gas stream comprising elemental sulfur and water by way of the Claus reaction;
- further contacting the effluent gas stream from the first reaction zone with one or more additional catalytic reaction zones comprising one or more additional catalysts;
- and
- recovering the elemental sulfur from the product gas stream.
2 more elements
Dependencies are inferred from the claim text.