Practical method of CO 2 sequestration

Details Practical method of CO 2 sequestration Practical method of CO 2 sequestration

2011-03-01

2011-03-01

Lawrence, Frank M (Department: 1775)

Gas separation: processes

Solid sorption

Inorganic gas or liquid particle sorbed

C095S148000, C096S154000, C252S184000, C423S230000

Reexamination Certificate

active

07896953

ABSTRACT:
A process and device to capture of CO2at its originating source, such as a power plant, is disclosed. Absorbent material is recharged by desorbing CO2, 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 CO2in N2. Under the more severe calcination condition at 850° C. and 20 wt % CO2in N2, 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.

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