Systems, methods and materials for hydrogen sulfide conversion
AssigneeOhio State Innovation Foundation
InventorsLiang-Shih Fan, Sourabh G. Nadgouda, Kalyani V. Jangam
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Abstract
Systems and methods use bimetallic alloy particles for converting hydrogen sulfide (H2S) to hydrogen (H2) and sulfur (S), typically during multiple operations. In a first operation, metal alloy composite particles can be converted to a composite metal sulfide. In a second operation, composite metal sulfide from the first operation can be regenerated back to the metal alloy composite particle using an inert gas stream. Pure, or substantially pure, sulfur can also be generated during the second operation.
Claims27
A method comprising:
- contacting a first gaseous input stream comprising hydrogen sulfide (H2S) with a metal alloy particle at a temperature between 300° C. and 450° C., the metal alloy particle comprising at least a first metal component comprising a first metal, and a second metal component comprising a second metal that is different from the first metal,
- whereupon the hydrogen sulfide (H2S) in the first gaseous input stream reacts in a sulfidation reaction with the metal alloy particle to generate hydrogen gas (H2) and one or more sulfide minerals,
- collecting a first gaseous product stream comprising the hydrogen gas (H2);
- after collecting the first gaseous product stream, contacting a second gaseous input stream comprising at least one inert gas with the one or more sulfide minerals, thereby generating sulfur gas and regenerating the metal alloy particle;
- and
- collecting a second gaseous product stream comprising the sulfur gas.
A metal alloy particle for use in a method of converting H2S to hydrogen (H2) and sulfur, the metal alloy particle comprising a first metal component, a second metal component, and at least one secondary material,
- wherein the first metal component comprises iron, the second metal component comprises chromium, and the at least one secondary material is molybdenum, nickel, cobalt, manganese, tungsten, vanadium or a combination thereof.
Dependencies are inferred from the claim text.