Thermochemical cycle for splitting hydrogen sulfide

Details Thermochemical cycle for splitting hydrogen sulfide Thermochemical cycle for splitting hydrogen sulfide

1988-12-08

1991-03-12

Russel, Jeffrey E.

Chemistry of inorganic compounds

Sulfur or compound thereof

Elemental sulfur

423416, 4236481, C01B 1704, C01B 306, C01B 3126

Patent

active

049991787

ABSTRACT:
A thermochemical cycle for the recovery of hydrogen and sulfur by splitting hydrogen sulfide, based upon initial reactions between the hydrogen sulfide and carbon dioxide or carbon monoxide. The cycle exists in three versions, two utilizing the initial reaction of hydrogen sulfide and carbon dioixide. One of these versions utilizes high temperature for the initial step for production of carbon monoxide for use in the shift reaction to produce hydrogen. The other conducts the initial step of moderate temperature in the presence of a desiccant to increase the yields of carbonyl sulfide and carbon disulfide, which are subsequently subjected to high temperature reactions to produce the carbon monoxide for the shift reaction. The third version employs the reaction of hydrogen sulfide with carbon monoxide at moderate temperatures producing original hydrogen and fractions including carbonyl sulfide and carbon disulfide, which are later reacted at high temperatures for production of carbon monoxide and sulfur, the carbon monoxide being recycled to the initial reaction.

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Mellor, A Comprehensive Treatise on Inorganic and Theoretical Chemistry, Longmans, Green and Co. 1946, vol. V, pp. 972, 974, 975.

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