Method and apparatus for separating oxygen from a gaseous mixtur

Chemistry: electrical and wave energy – Processes and products – Electrostatic field or electrical discharge

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

204265, 204266, 204260, 204262, 204290R, 204292, C25B 102, C25B 900, C25B 1508

Patent

active

053022580

ABSTRACT:
A solid composition provides high oxygen ion conductivity, and includes a metal oxide combined with multiple dopants. The oxide may, for example, include zirconia, bismuth trioxide, thoria or halfnia. The dopants are chosen such that they are of similar ionic radius to the oxide, but such that they generally have different valences. For example, zirconium has a +4 valence, while dopants are usually chosen which have +2 or +3 valences. Possible dopants include materials such as magnesia, yttria, and oxides of calcium, barium, strontium, lanthanum, and scandium. It has been found that choosing the dopants such that they exist in the composition at specified ratios results in surprising ability to transport oxygen ions. In the case of a composition which includes magnesia and yttria dopants placed within a zirconia matrix, it has been found desirable to maintain the ratio of the mole percentages of the magnesia to the yttria in the range of from about 6.5:10 to about 9.5:10. Also disclosed are methods and apparatus for using the composition in removing oxygen and water from a mixture of gases. Such a process is valuable in the isolation and purification of both oxygen and the other gases in the mixture.

REFERENCES:
patent: Re28792 (1976-04-01), Ruka et al.
patent: 3640887 (1972-02-01), Anderson
patent: 3887387 (1975-06-01), Sturhahn
patent: 3914169 (1975-10-01), Horowitz
patent: 4205051 (1980-05-01), Takahashi et al.
patent: 4475994 (1984-10-01), Gagne et al.
patent: 4547281 (1985-10-01), Wang et al.
patent: 4659435 (1987-04-01), Brothers et al.
patent: 4725346 (1988-02-01), Joshi
patent: 4728584 (1988-03-01), Isenberg
patent: 4851103 (1989-07-01), Usami et al.
patent: 4879016 (1989-11-01), Joshi et al.
patent: 5007992 (1991-04-01), Weber
patent: 5017532 (1991-05-01), Sonnenberg et al.
patent: 5021137 (1991-06-01), Joshi et al.
patent: 5022975 (1991-06-01), Gordon
patent: 5045169 (1991-09-01), Feduska et al.
patent: 5186806 (1993-02-01), Clark et al.
"Revised Effective Ionic Radii and Systematic Studies of Interatomic Distances in Halides and Chalcogenides"; R. D. Shannon; Acta Cryst., 751-767 (1976).
"Oxygen Production Using Solid-State Zirconia Electrolyte Technology"; Jerry W. Suitor and Douglas J. Clark; Jet Propulsion Laboratory, California Institute of Technology, Pasadena, Calif.; Sep. 1990 or thereafter; pp. 127 through 132.
"Dense-Ceramic Oxygen Conducting Membranes"; GRI-90/0303; Apr. 1989 through Sep. 1990; pp. 33 through 35; four pages of references.
"A Model To Predict The Removal of Oxygen From Air Using A Zirconia Solid Electrolyte Membrane"; W. J. Marner, J. W. Suitor, and C. R. Glazer; Proceedings of the 23rd Intersociety Energy Conversion Conference; vol. 2, ASME, New York, 1988; pp. 265 through 271.
"The Zirconia Oxygen Separation Process"; Jet Propulsion Laboratory, Pasadena, Calif.; May 1987; pp. 2-1 through 2-5.
"Solid Electrolytes With Oxygen Ion Conduction"; E. C. Subbarao and H. S. Maiti; Solid State Ionics; 1984; vol. 11; pp. 317 through 338.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Method and apparatus for separating oxygen from a gaseous mixtur does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and apparatus for separating oxygen from a gaseous mixtur, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for separating oxygen from a gaseous mixtur will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-2096185

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.