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Metal-organic frameworks for Xe/Kr separation

United States Patent

July 22, 2014
View the Complete Patent at the US Patent & Trademark Office
Metal-organic framework (MOF) materials are provided and are selectively adsorbent to xenon (Xe) over another noble gas such as krypton (Kr) and/or argon (Ar) as a result of having framework voids (pores) sized to this end. MOF materials having pores that are capable of accommodating a Xe atom but have a small enough pore size to receive no more than one Xe atom are desired to preferentially adsorb Xe over Kr in a multi-component (Xe--Kr mixture) adsorption method. The MOF material has 20% or more, preferably 40% or more, of the total pore volume in a pore size range of 0.45-0.75 nm which can selectively adsorb Xe over Kr in a multi-component Xe--Kr mixture over a pressure range of 0.01 to 1.0 MPa.
Ryan; Patrick J. (Vernon Hills, IL), Farha; Omar K. (Morton Grove, IL), Broadbelt; Linda J. (Glenview, IL), Snurr; Randall Q. (Evanston, IL), Bae; Youn-Sang (Evanston, IL)
Northwestern University (Evanstone, IL)
13/ 974,406
August 23, 2013
CONTRACTUAL ORIGIN OF THE INVENTION This invention was made with government support under Grant No. DE-FG02-03ER15457 awarded by the Department of Energy. The government has certain rights in the invention.