CO.sub.2 separation from low-temperature flue gases

Patent · Tue Nov 30 00:00:00 EST 2010

OSTI ID:1017440

Dilmore, Robert ^[1]; Allen, Douglas ^[2]; Soong, Yee ^[3]; Hedges, Sheila ^[4]

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1. Irwin, PA
2. Salem, MA
3. Monroeville, PA
4. Bethel Park, PA

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 CO.sub.2 absorption 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.sub.2. Both methods also take advantage of the low-regeneration temperatures of CO.sub.2-bearing mineral systems such as Na.sub.2CO.sub.3/NaHCO.sub.3 and K.sub.2CO.sub.3/KHCO.sub.3.

• Research Organization: National Energy Technology Laboratory (NETL), Pittsburgh, PA, Morgantown, WV (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: NETL
• Assignee: The United States of America as represented by the United States Department of Energy (Washington, DC)
• Patent Number(s): 7,842,126
• Application Number: 12/241,430
• OSTI ID: 1017440
• Country of Publication: United States
• Language: English