Method for reducing carbon dioxide emissions and water contamination potential while increasing product yields from carbon gasification and energy production processes
First Claim
1. A method for reducing the carbon dioxide emissions, increasing product yield and process efficiency from any operation which oxidizes carbon. These improvements are accomplished by incorporating the carbon dioxide to carbon monoxide reduction reaction with or without the conversion of carbon monoxide to hydrogen via the water-gas shift reaction.
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Abstract
Carbon dioxide from a process which oxidizes a carbon containing feed is separated and reduced to carbon monoxide using a carbon dioxide reduction reactor [22, 26] coupled to a water gas shift reactor [14], to simultaneously reduce carbon dioxide emissions and increase the product yield of clean fuels. In the preferred underground carbon gasification application, these reduction and shift reactions are substantially promoted by utilizing temporary [24] and permanent storage [28] of the carbon dioxide and carbon monoxide coupled with cyclic operational procedures. Additional advantages include carbon dioxide sequestration, removal of contaminants from the groundwater affected by the process and the ability to influence groundwater flow patterns to improve gasification efficiency and reduce potential environmental effects.
8 Citations
19 Claims
- 1. A method for reducing the carbon dioxide emissions, increasing product yield and process efficiency from any operation which oxidizes carbon. These improvements are accomplished by incorporating the carbon dioxide to carbon monoxide reduction reaction with or without the conversion of carbon monoxide to hydrogen via the water-gas shift reaction.
- 11. A method for sequestering carbon dioxide or other wastes in spent underground carbon gasification reactors while simultaneously controlling the migration of groundwater and underground process water to improve process efficiency and control contaminant migration.
- 16. A method to remediate the water in the still contaminated, underground coal gasification reactors.
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