| US 7,556,676 B2 | ||
| Composite oxygen ion transport membrane | ||
| Nagendra Nagabhushana, Williamsville, N.Y. (US); Jonathan Andrew Lane, Amherst, N.Y. (US); Gervase Maxwell Christie, Buffalo, N.Y. (US); and Bart Antonie van Hassel, Getzville, N.Y. (US) | ||
| Assigned to Praxair Technology, Inc., Danbury, Conn. (US) | ||
| Filed on Aug. 22, 2006, as Appl. No. 11/507,486. | ||
| Prior Publication US 2008/0047431 A1, Feb. 28, 2008 | ||
| Int. Cl. B01D 53/22 (2006.01) | ||
| U.S. Cl. 96—11 [96/4; 95/54] | 10 Claims |
| 1. A composite oxygen ion transport membrane comprising:
a dense layer having an electronic phase and an ionic phase;
said electronic phase is (LauSrvCe1−u−v)wCrxMnyVzO3−5, where u is from about 0.7 to about 0.9, v is from about 0.1 to about 0.3 and (1−u−v) is greater than or equal to zero, w
is from about 0.94 to about 1, x is from about 0.67 to about 0.77, y is from about 0.2 to about 0.3, z is from about 0.015
to about 0.03, and x+y+z=1;
said ionic phase is Zrx′Scy′Az′O2−δ, where y′ is from about 0.08 to about 0.15, z′ is from about 0.01 to about 0.03, x′+y′+z′=1 and A is Y or Ce or mixtures
of Y and Ce;
a porous support layer, said porous support layer formed of Zrx″Ay″O2−δ, where y″ is from about 0.03 to about 0.05, x″+y″=1, A is Y or Sc or Al or Ce or mixtures of Y, Sc, Al and Ce.
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