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Heat recovery from sorbent-based CO.sub.2 capture

United States Patent

March 10, 2015
View the Complete Patent at the US Patent & Trademark Office
The present invention provides a method of increasing the efficiency of exothermic CO.sub.2 capture processes. The method relates to withdrawing heat generated during the exothermic capture of CO.sub.2 with various sorbents via heat exchange with a working fluid. The working fluid is provided at a temperature and pressure such that it is in the liquid state, and has a vaporization temperature in a range such that the heat arising from the reaction of the CO.sub.2 and the sorbent causes a phase change from liquid to vapor state in whole or in part and transfers heat from to the working fluid. The resulting heated working fluid may subsequently be used to generate power.
Jamal; Aqil (Richmond, TX), Gupta; Raghubir P. (Durham, NC)
Research Triangle Institute (Research Triangle Park, NC)
13/ 993,903
December 16, 2011
FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT This invention was made with United States Government Support under Grant No. DE-FC26-07NT43089, awarded by the Department of Energy. The United States Government has certain rights in this invention.