Process for producing hydrogen and sulphur from hydrogen sulphide
AssigneeDavy International Aktiengesellschaft
InventorsLars Hellmer, Gerhard Keunecke, Rainer Lell, Ghazi R. Al-Muddarris, Reinhard Pachaly, Adolf Stauffer, V. Rao Vangala
Life of this patent
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Abstract
A process is provided for the production of hydrogen and sulphur from a gas containing hydrogen sulphide. Such a process comprises passing the gas through a cracking zone at a temperature of from about 850.degree. C. to 1600.degree. C., cooling the cracked gas to a temperature of from about 110.degree. C. to 150.degree. C., and separating the condensed elemental sulphur. The uncracked hydrogen sulphide is separated and returned to the cracking zone; the remaining gas is withdrawn as hydrogen-rich gas.
Claims14
A process for the production of hydrogen and sulphur by thermal cracking, said process comprising:
- (A) conducting a hydrogen sulphide-containing feed gas through a cracking zone maintained at a temperature of from about 850.degree. C. to 1600.degree. C., to thereby effect cracking of the hydrogen sulphide in said feed gas;
- (B) cooling the cracked gas to temperatures of from about 110.degree. to 150.degree. C. to thereby condense elemental sulphur formed by the cracking;
- (C) separating said elemental sulfur condensed by said cooling from said cracked gas;
- (D) heating the cracked gas, after said separation of the condensed sulfur, to temperatures in the range of from 100.degree. to 400.degree. C.;
- (E) conducting the heated cracked gas over a hydrogenation catalyst;
- (F) washing the cracked gas with a basic and/or with a physically acting washing liquid in order to separate uncracked and reconverted hydrogen sulfide therefrom;
- (G) desorbing the separated hydrogen sulfide from said washing liquid and recycling the desorbed hydrogen sulfide to the cracking zone;
- and
- (H) drawing off the residual gas after separation of said elemental sulfur and said uncracked and reconverted hydrogen sulfide as hydrogen-rich gas.
Dependencies are inferred from the claim text.