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Regenerable sorbent technique for capturing CO.sub.2 using immobilized amine sorbents

United States Patent

August 6, 2013
View the Complete Patent at the US Patent & Trademark Office
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The disclosure provides a CO.sub.2 absorption method using an amine-based solid sorbent for the removal of carbon dioxide from a gas stream. The method disclosed mitigates the impact of water loading on regeneration by utilizing a conditioner following the steam regeneration process, providing for a water loading on the amine-based solid sorbent following CO.sub.2 absorption substantially equivalent to the moisture loading of the regeneration process. This assists in optimizing the CO.sub.2 removal capacity of the amine-based solid sorbent for a given absorption and regeneration reactor size. Management of the water loading in this manner allows regeneration reactor operation with significant mitigation of energy losses incurred by the necessary desorption of adsorbed water.
Pennline; Henry W. (Bethel Park, PA), Hoffman; James S. (South Park, PA), Gray; McMahan L. (Pittsburgh, PA), Fauth; Daniel J. (Pittsburgh, PA), Resnik; Kevin P. (White Oak, PA)
U.S. Department of Energy (Washington, DC)
13/ 052,331
March 21, 2011
GOVERNMENT INTERESTS The United States Government has rights in this invention pursuant to the employer-employee relationship of the Government to the inventors as U.S. Department of Energy employees and site-support contractors at the National Energy Technology Laboratory.