The United States of America As Represented by the Department of Energy

Sheila Hedges

Yee Soong

Douglas E Allen

Robert Dilmore

Two methods are provide for the separation of carbon dioxide from the flue gases. The first method utilizes a phase-separating moiety dissolved in an aqueous solution of a basic moiety to capture carbon dioxide. The second method utilizes a phase-separating moiety as a suspended solid in an aqueous solution of a basic moiety to capture carbon dioxide. The first method takes advantage of the surface-independent nature of the COabsorption reactions in a homogeneous aqueous system. The second method also provides permanent sequestration of the carbon dioxide. Both methods incorporate the kinetic rate enhancements of amine-based scrubbing while eliminating the need to heat the entire amine solution (80% water) in order to regenerate and release CO. Both methods also take advantage of the low-regeneration temperatures of CO-bearing mineral systems such as NaCO/NaHCOand KCO/KHCO.

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Sheila Hedges