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Abstract

Systems and methods are described that utilize mixed conductive membranes in conjunction with solid oxide electrolysis in a single unit operation. The mixed conductive membranes of the systems are high-flux electrochemical separation membranes that can selectively and efficiently capture CO₂ from a source gas, e.g., a flue gas or fuel gas, by transporting the CO₂ across the membrane in the form of carbonate ions followed by oxidation of the carbonate-ions at the second side of the membrane to reform CO₂ in a capture stream. The solid oxide electrolysis can be immediately downstream of the capture system to convert the CO₂ into CO and H₂O into H₂, for example thereby forming syngas thereby capturing CO₂ and converting it to a more useful form.

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First Claim