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Practical method of CO.sub.2 sequestration

United States Patent

March 1, 2011
View the Complete Patent at the US Patent & Trademark Office
A process and device to capture of CO.sub.2 at its originating source, such as a power plant, is disclosed. Absorbent material is recharged by desorbing CO.sub.2, so that it may be sequestered or used in another application. Continual recharging results in loss of absorbent surface area, due to pore plugging and sintering of particles. Calcium oxide or calcium hydroxide was immobilized to a fibrous ceramic-based fabric substrate as a thin film and sintered, creating an absorbent material. The samples were characterized, showing continuous cyclic carbonation conversions between about 62% and 75% under mild calcination conditions at C. and no CO.sub.2 in N.sub.2. Under the more severe calcination condition at C. and 20 wt % CO.sub.2 in N.sub.2, yttria fabric was superior to alumina as a substrate for carbon dioxide capture and the reactivity of the calcium oxide absorbent immobilized to yttria was maintained at the same level in the 12 cycles.
Goswami; D. Yogi (Gainesville, FL), Lee; Man Su (Houston, TX), Kothurkar; Nikhil K. (Tampa, FL), Stefanakos; Elias K. (Tampa, FL)
University of South Florida (Tampa, FL)
12/ 335,049
December 15, 2008
GOVERNMENT INTEREST This invention was made with Government support under Grant DE-FG36-04GO14224, awarded by the U.S. Department of Energy. The Government has certain rights in the invention.