Treatment of a gas stream containing hydrogen sulphide

Details Treatment of a gas stream containing hydrogen sulphide Treatment of a gas stream containing hydrogen sulphide

C - Chemistry, Metallurgy

01

B

C01B 17/04 (2006.01) B01D 53/00 (2006.01) B01D 53/14 (2006.01) B01D 53/52 (2006.01) B01D 53/73 (2006.01)

Patent

CA 2354305

Sour gas containing hydrogen sulphide has hydrogen sulphide absorbed therefrom in an absorbent in a vessel 4. A hydrogen sulphide rich gas stream is formed by desorbing hydrogen sulphide from the absorbent in a vessel 12. The resulting hydrogen sulphide rich gas stream is partially burned in a furnace 32. Resulting sulphur dioxide reacts therein with residual hydrogen sulphide to form sulphur vapour which is extracted in a condenser 44. Residual sulphur dioxide and sulphur vapour are reduced to hydrogen sulphide in catalyst stage 54 of a reactor 50. Water vapour is removed from the resulting reduced gas stream by direct contact with water in a quench tower 60. At least part of the resulting water vapour depleted gas stream is sent to the vessel 4 with the incoming sour gas stream.

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