Functionalized inorganic membranes for gas separation

Details Functionalized inorganic membranes for gas separation Functionalized inorganic membranes for gas separation

2008-07-08

2008-07-08

Lawrence, Frank M (Department: 1797)

Gas separation: processes

Selective diffusion of gases

Selective diffusion of gases through substantially solid...

C096S011000

Reexamination Certificate

active

07396382

ABSTRACT:
A porous membrane for separation of carbon dioxide from a fluid stream at a temperature higher than about 200° 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, La2O3, CeO2, ATiO3, AZrO3, AAl2O4, A1FeO3, A1MnO3, A1CoO3, A1NiO3, A2HfO3, A3CeO3, Li2ZrO3, Li2SiO3, Li2TiO3or a mixture thereof;wherein A is Mg, Ca, Sr or Ba;A1is La, Ca, Sr or Ba;A2is Ca, Sr or Ba; andA3is Sr or Ba.

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