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Functionalized inorganic membranes for gas separation

United States Patent

7,396,382
July 8, 2008
View the Complete Patent at the US Patent & Trademark Office
A porous membrane for separation of carbon dioxide from a fluid stream at a temperature higher than about 200.degree. C. with selectivity higher than Knudsen diffusion selectivity. The porous membrane comprises a porous support layer comprising alumina, silica, zirconia or stabilized zirconia; a porous separation layer comprising alumina, silica, zirconia or stabilized zirconia, and a functional layer comprising a ceramic oxide contactable with the fluid stream to preferentially transport carbon dioxide. In particular, the functional layer may be MgO, CaO, SrO, BaO, La.sub.2O.sub.3, CeO.sub.2, ATiO.sub.3, AZrO.sub.3, AAl.sub.2O.sub.4, A.sup.1FeO.sub.3, A.sup.1MnO.sub.3, A.sup.1CoO.sub.3, A.sup.1NiO.sub.3, A.sup.2HfO.sub.3, A.sup.3CeO.sub.3, Li.sub.2ZrO.sub.3, Li.sub.2SiO.sub.3, Li.sub.2TiO.sub.3 or a mixture thereof; wherein A is Mg, Ca, Sr or Ba; A.sup.1 is La, Ca, Sr or Ba; A.sup.2 is Ca, Sr or Ba; and A.sup.3 is Sr or Ba.
Ku; Anthony Yu-Chung (Rexford, NY), Ruud; James Anthony (Delmar, NY), Molaison; Jennifer Lynn (Marietta, GA), Schick; Louis Andrew (Delmar, NY), Ramaswamy; Vidya (Niskayuna, NY)
General Electric Company (Niskayuna, NY)
11/ 263,165
20070068382
October 31, 2005
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH AND DEVELOPMENT This invention was made with Government support under contract number DOE NETL DE-FC26-05NT42451 awarded by the U.S. Department of Energy. The Government may have certain rights in the invention.