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Title: High capacity carbon dioxide sorbent

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.
Inventors:
; ;
Issue Date:
OSTI Identifier:
1213459
Assignee:
TDA Research, Inc. (Wheat Ridge, CO) DOESC
Patent Number(s):
9,120,079
Application Number:
14/217,218
Contract Number:
SC0006239
Resource Relation:
Patent File Date: 2014 Mar 17
Research Org:
TDA Research, Inc., Wheat Ridge, CO (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES

Works referenced in this record:

Characterization and application of activated carbon produced by H3PO4 and water vapor activation
journal, October 2006

Effects of activated carbon surface chemistry and pore structure on the adsorption of organic contaminants from aqueous solution
journal, January 2002

A new model for calculating the adsorption equilibrium constant of water vapor in micropores of activated carbon
journal, June 2014