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US 12,502,650 B2Granted
Calcination process
AssigneeOrigen Power Ltd
InventorTim Kruger
Life of this patent
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Abstract
Described is the use of a mineral comprising a metal carbonate fraction and a fuel fraction, such as oil shale or coal shale, in a calcination process. The disclosed process can advantageously result in carbon dioxide being removed from the atmosphere. Further, in the process, heat energy generated during calcination can be used to separate oxygen from air, so that the oxygen can be fed back into the system. Alternatively or in addition, heat energy may also be used to compress the gaseous carbon dioxide generated from the calcination process.
Claims17
A process comprising:
- (a) providing a mineral comprising a metal carbonate fraction and a fuel fraction, wherein the fuel fraction has a calorific value which is at least 50% of the energy needed to calcine the metal carbonate fraction, and combusting the mineral in the presence of oxygen, water vapour and carbon dioxide, to generate a metal oxide, water vapour, carbon dioxide and heat;
- wherein the mineral is combusted in a mixture of gases comprising 5 to 20% by volume water vapour, 15 to 25% by volume oxygen, and 60 to 75% by volume carbon dioxide.
Dependencies are inferred from the claim text.