Process for reducing total sulfur content of Claus off-gases

Patent · Tue Mar 30 04:00:00 EST 1976

OSTI ID:7328156

Groenendaal, W; Kock, H G.A.; Loof, P

An improved Claus off-gas treating process is disclosed where sulfur dioxide and other convertible sulfur compounds present in the off-gas are catalytically reduced to hydrogen sulfide by mixing said off-gases with the hot gaseous product of the combustion of a carbonaceous fuel with an oxygen-containing gas in a line burner to heat the off-gases to a temperature above 175/sup 0/C and passing the heated gaseous product together with a hydrogen-containing gas over a reduction catalyst thereby converting substantially all of the sulfur dioxide and other convertible sulfur compounds present to hydrogen sulfide which is subsequently removed with an absorbent. The improvement comprises introducing hydrogen-containing gas required in the catalytic reduction step directly into the line burner at a point where the temperature of the gaseous product of combustion is sufficiently high to support spontaneous combustion between the hydrogen so introduced and any excess oxygen which may be present in the combustion product. 3 Claims, 2 Drawing Figures.

• Assignee: Shell Oil Co.
• Patent Number(s): US 3947547
• OSTI ID: 7328156
• Country of Publication: United States
• Language: English

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54 ENVIRONMENTAL SCIENCES
AIR POLLUTION
CATALYSIS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL REACTIONS
CLAUS PROCESS
COMBUSTION
CRYOGENIC FLUIDS
ELEMENTS
FLUIDS
GASEOUS WASTES
HYDROGEN
HYDROGEN COMPOUNDS
HYDROGEN SULFIDES
NONMETALS
OFF-GAS SYSTEMS
OXIDATION
OXIDES
OXYGEN COMPOUNDS
POLLUTION
PURIFICATION
REDUCTION
REMOVAL
SULFIDES
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
WASTES