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US 7,288,136 B1Granted
High capacity immobilized amine sorbents
AssigneeUnited States of America Department of Energy
InventorsMcMahan L. Gray, Kenneth J. Champagne, Yee Soong, Thomas Filburn
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Abstract
A method is provided for making low-cost CO2 sorbents that can be used in large-scale gas-solid processes. The improved method entails treating an amine to increase the number of secondary amine groups and impregnating the amine in a porous solid support. The method increases the CO2 capture capacity and decreases the cost of utilizing an amine-enriched solid sorbent in CO2 capture systems.
Claims8
A method for producing a CO2-capturing sorbent complex, the method comprising:
- a) identifying an amine which reacts with CO2 to form carbonate at temperatures ranging from 25° C. to 65° C.;
- b) increasing the number of secondary amine groups on the amine, thereby modifying the amine;
- c) treating a solid porous substrate with the modified amine so as to cause the modified amine to adhere to the substrate;
- and
- d) regenerating the modified amine in situ in the presence of water vapor.
2 more elements
Dependencies are inferred from the claim text.