Method for removing hydrogen sulfide from sulfur-bearing industr

Details Method for removing hydrogen sulfide from sulfur-bearing industr Method for removing hydrogen sulfide from sulfur-bearing industr

1976-06-08

1978-04-18

Peters, G. O.

Chemistry of inorganic compounds

Sulfur or compound thereof

Elemental sulfur

423576, C01B 1700

Patent

active

040851990

ABSTRACT:
Integrating an absorption-desorption step, a Claus plant, and a catalytic hydrogen reactor in a recycle loop provides a gas-desulfuration plant that operates at a substantially zero emission level. Hydrogen sulfide is removed from industrial gas streams by absorption-desorption in a liquid absorbent. The resulting foul gas is then reacted with sulfur dioxide in a Claus reaction, i.e., the reaction of hydrogen sulfide with sulfur dioxide to form elemental sulfur and water. The tail gas from this Claus reaction is then passed through a catalytic hydrogenation reactor together with a supply of hydrogen to reduce the sulfur and sulfur compounds to hydrogen sulfide. The now reduced tail gas is then recycled back to the industrial gas, upstream of the absorption-desorption step.

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Naber et al., "Chemical Engineering Progress" vol. 69, No. 12, Dec. 1973, pp. 29-34.

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