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High capacity carbon dioxide sorbent

United States Patent

9,120,079
September 1, 2015
View the Complete Patent at the US Patent & Trademark Office
The present invention provides a sorbent for the removal of carbon dioxide from gas streams, comprising: a CO.sub.2 capacity of at least 9 weight percent when measured at 22.degree. C. and 1 atmosphere; an H.sub.2O capacity of at most 15 weight percent when measured at 25.degree. C. and 1 atmosphere; and an isosteric heat of adsorption of from 5 to 8.5 kilocalories per mole of CO.sub.2. The invention also provides a carbon sorbent in a powder, a granular or a pellet form for the removal of carbon dioxide from gas streams, comprising: a carbon content of at least 90 weight percent; a nitrogen content of at least 1 weight percent; an oxygen content of at most 3 weight percent; a BET surface area from 50 to 2600 m.sup.2/g; and a DFT micropore volume from 0.04 to 0.8 cc/g.
Dietz; Steven Dean (Englewood, CO), Alptekin; Gokhan (Boulder, CO), Jayaraman; Ambalavanan (Denver, CO)
TDA Research, Inc. (Wheat Ridge, CO)
14/ 217,218
March 17, 2014
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT This invention was made using U.S. government funding through the U.S. Department of Energy contract Nos. DE-FE0000469 and DE-SC0006239 and Environmental Protection Agency contract No. EP-D-11-051. The government has certain rights in this invention