Chemistry of inorganic compounds – Hydrogen or compound thereof – Elemental hydrogen
Patent
1982-05-11
1983-12-20
Meros, Edward J.
Chemistry of inorganic compounds
Hydrogen or compound thereof
Elemental hydrogen
423522, 423539, 423543, 423567R, 423659, 126436, 606419, 6064115, C01B 116
Patent
active
044217340
ABSTRACT:
A method of storing heat is provided utilizing a chemical cycle which interconverts sulfuric acid and sulfur. The method can be used to levelize the energy obtained from intermittent heat sources, such as solar collectors. Dilute sulfuric acid is concentrated by evaporation of water, and the concentrated sulfuric acid is boiled and decomposed using intense heat from the heat source, forming sulfur dioxide and oxygen. The sulfur dioxide is reacted with water in a disproportionation reaction yielding dilute sulfuric acid, which is recycled, and elemental sulfur. The sulfur has substantial potential chemical energy and represents the storage of a significant portion of the energy obtained from the heat source. The sulfur is burned whenever required to release the stored energy.
A particularly advantageous use of the heat storage method is in conjunction with a solar-powered facility which uses the Bunsen reaction in a water-splitting process. The energy storage method is used to levelize the availability of solar energy while some of the sulfur dioxide produced in the heat storage reactions is converted to sulfuric acid in the Bunsen reaction.
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A. Braggi, G. Beghi, "Decomposition of Sulphuric Acid Using Hot Air A Process Applied to Thermochemical Cycles for Hydrogen Production".
Conference: "Energy to the 21st Century", Proceedings of the 15th Intersociety Energy Conversion Engineering Conference, pp. 2003-2007.
GA Technologies Inc.
Leeds Jackson
Meros Edward J.
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