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US 8,911,539 B2Granted
Process for the separation of carbon dioxide from flue gas
AssigneesChevron U.S.A. Inc., University of South Alabama
InventorsDaniel Chinn, Russell Evan Cooper, Zunqing He, James H. Davis, Jr., Kevin N. West, Hye Kyung Timken, Michael S. Driver
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Abstract
A process and system for separating CO2 from a flue gas stream is disclosed. The process involves (a) contacting a flue gas stream containing water vapor and CO2 with an ionic absorbent under absorption conditions to absorb at least a portion of the CO2 from the flue gas stream and form a CO2-absorbent complex; wherein the ionic absorbent comprises a cation and an anion comprising an amine moiety; and (b) recovering a gaseous product having a reduced CO2 content.
Claims13
A system comprising:
- (a) a supply of a flue gas stream containing water vapor and CO2;
- (b) a supply of an ionic absorbent comprising a cation and an anion comprising an amine moiety;
- (c) a supply of a diluent, wherein the diluent is selected from the group consisting water, a monohydric alcohol, a polyol, and mixtures thereof, and
- (d) an absorption unit for contacting the flue gas stream and an aqueous solution comprising the ionic absorbent and diluent under absorption conditions to absorb at least a portion of the CO2 from the flue gas stream and fbrm a CO2-absorbent complex and a gaseous product having a reduced CO2, content;
- wherein the total amount of water is from about 15 to about 80 wt. %, based on the total weight of the aqueous solution.
2 more elements
Dependencies are inferred from the claim text.