Composition for extracting oxygen from fluid streams

Compositions – Electrically conductive or emissive compositions – Metal compound containing

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252521, 501103, H01B 106, C04B 3548

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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

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