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Circulating moving bed system for CO.sub.2 separation, and method of same

United States Patent

9,527,029
December 27, 2016
View the Complete Patent at the US Patent & Trademark Office
A circulating moving bed and process for separating a carbon dioxide from a gas stream is disclosed. The circulating moving bed can include an adsorption reactor and a desorption reactor, and a sorbent that moves through the two reactors. The sorbent can enter the adsorptive reactor and one end and move to an exit point distal to its entry point, while a CO.sub.2 feed stream can enter near the distal point and move countercurrently through the sorbent to exit at a position near the entry point of the sorbent. The sorbent can adsorb the CO.sub.2 by concentration swing adsorption and adsorptive displacement. The sorbent can then transfer to a regeneration reactor and can move countercurrently against a flow of steam through the regeneration reactor. The sorbent can be regenerated and the carbon dioxide recaptured by desorbing the carbon dioxide from the sorbent using concentration swing desorption and desorptive displacement with steam.
Elliott; Jeannine Elizabeth (Superior, CO), Copeland; Robert James (Arvada, CO)
TDA RESEARCH, INC. (Wheat Ridge, CO)
14/ 325,519
20150010452
July 8, 2014
STATEMENT OF FEDERALLY SPONSORED RESEARCH Portions of this disclosure were made with Government support under Grant Number DE-NT0005497, awarded by The Department of Energy. The Government may have certain rights in the disclosure.