Man Tim Lee

US Patent:

7896953, Mar 1, 2011

Filed:

Dec 15, 2008

Appl. No.:

12/335049

Inventors:

D. Yogi Goswami - Gainesville FL, US
Man Su Lee - Houston TX, US
Nikhil K. Kothurkar - Tampa FL, US
Elias K. Stefanakos - Tampa FL, US

Assignee:

University of South Florida - Tampa FL

International Classification:

B01D 53/14
B01D 53/62

US Classification:

95139, 95148, 96154, 252184, 423230

Abstract:

A process and device to capture of COat its originating source, such as a power plant, is disclosed. Absorbent material is recharged by desorbing CO, 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 750 C. and no COin N. Under the more severe calcination condition at 850 C. and 20 wt % COin N, 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.