Compositions – Electrically conductive or emissive compositions – Metal compound containing
Patent
1992-03-19
1995-01-10
Valentine, Donald R.
Compositions
Electrically conductive or emissive compositions
Metal compound containing
252521, 501103, H01B 106, C04B 3548
Patent
active
053804678
ABSTRACT:
Methods of and apparatus for generating high purity oxygen. Employed for this purpose is a "membrane cell" comprised of a praseodymia-modified, yttria-stabilized zirconia film that is fabricated onto a porous support, typically a tube of calcia-stabilized zirconia. This cell has the capability of "pumping" oxygen. As a consequence, oxygen in a pressurized fluid stream on the outer face of the membrane can be extracted from that stream and pumped as oxygen ions through the membrane without parasitic electric power and then released on the opposite side of the porous support tube as pure (electrolytic grade) oxygen. Extraction of pure oxygen continues as long as an oxygen partial pressure differential is maintained across the mixed conduction, "shorted" membrane. Oxygen thus produced can be used in industrial processes--for example, in coal gasification--or for other purposes.
REFERENCES:
patent: 3950273 (1976-04-01), Jones
patent: 4093879 (1978-06-01), Marchant et al.
patent: 4971830 (1990-11-01), Jensen
patent: 5017532 (1991-05-01), Sonnenberg et al.
patent: 5035962 (1991-07-01), Jensen
Feduska William
Kunkle Richard P.
Lin Ching-Yu
Valentine Donald R.
Westinghouse Electric Company
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