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Regenerable immobilized aminosilane sorbents for carbon dioxide capture applications

United States Patent

September 16, 2014
View the Complete Patent at the US Patent & Trademark Office
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A method for the separation of carbon dioxide from ambient air and flue gases is provided wherein a phase separating moiety with a second moiety are simultaneously coupled and bonded onto an inert substrate to create a mixture which is subsequently contacted with flue gases or ambient air. The phase-separating moiety is an amine whereas the second moiety is an aminosilane, or a Group 4 propoxide such as titanium (IV) propoxide (tetrapropyl orthotitanate, C.sub.12H.sub.28O.sub.4Ti). The second moiety makes the phase-separating moiety insoluble in the pores of the inert substrate. The new sorbents have a high carbon dioxide loading capacity and considerable stability over hundreds of cycles. The synthesis method is readily scalable for commercial and industrial production.
Gay; McMahan (Pittsburgh, PA), Choi; Sunho (Chestnut Hill, MA), Jones; Christopher W. (Mableton, GA)
Georgia Tech Research Corporation (Atlanta, GA), U.S. Department of Energy (Washington, DC)
13/ 212,284
August 18, 2011
CONTRACTUAL ORIGIN OF THE INVENTION The United States Government has rights in this invention pursuant to the employer-employee relationship of the Government to the inventor as a U.S. Department of Energy employee at the National Energy Technology Laboratory.