CO 2 separation from low-temperature flue gases

Details CO 2 separation from low-temperature flue gases CO 2 separation from low-temperature flue gases

2008-09-30

2010-11-30

Lawrence, Frank M (Department: 1775)

Gas separation: processes

Liquid contacting

And recycle or reuse of contact liquid for further contact

C095S205000, C423S225000, C423S232000

Reexamination Certificate

active

07842126

ABSTRACT:
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 CO2absorption 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 CO2. Both methods also take advantage of the low-regeneration temperatures of CO2-bearing mineral systems such as Na2CO3/NaHCO3and K2CO3/KHCO3.

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