Thermal reduction of sulfur dioxide to sulfur in a single reaction furnace
OwnerMahin Rameshni, Stephen L Santoinventors
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Abstract
Processes for the thermal reduction of sulfur dioxide to elemental sulfur in a single reaction furnace are disclosed. The reaction furnace contains an alumina monolith that performs as an active catalyst. The reaction furnace is followed by a Claus conversion zone, wherein H2S and SO2 react to produce additional elemental sulfur. Three methods to eliminate soot formation and two methods to consume produced H2 and CO are described. One or combination of these methods may be employed which consists of a) adding steam (water vapor), b) adding recycled sulfur or c) adding recycled tail gas.
Claims21
A process for the production of sulfur from sulfur dioxide (SO2)-containing effluent streams, the process comprising:
- a) forming a mixture of oxygen containing gas with a hydrocarbon gas stream and feeding this mixture together with a separate stream of sulfur dioxide containing gas in a single Catalytic reaction furnace zones, containing an “Alumina Monolith” which performs as an Active Catalyst wherein reactions occur at an elevated temperature for a period of time sufficient to produce an effluent stream comprising sulfur (S), hydrogen, CO, and water;
- b) the process comprises 2 different reaction zones:
- a single Catalytic reaction furnace zone, and a Claus Catalytic conversion zone;
- c) contacting the effluent gas stream from the catalytic reaction furnace zones in one or more Claus catalytic reaction stages comprising one or more catalysts;
- and;
- d) recovering elemental sulfur from the product gas stream.
Dependencies are inferred from the claim text.