Methods for separating oxygen from oxygen-containing gases [electronic resource].

Published: Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy, 2000.
Additional Creators: United States. Department of Energy. Office of Scientific and Technical Information

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Summary

This invention provides mixed conducting metal oxides particularly useful for the manufacture of catalytic membranes for gas-phase oxygen separation processes. The materials of this invention have the general formula: A.sub.x A'.sub.x A".sub.2-(x+x') B.sub.y B'.sub.y B".sub.2-(y+y') O.sub.5+z ; where x and x' are greater than 0; y and y' are greater than 0; x+x' is less than or equal to 2; y+y' is less than or equal to 2; z is a number that makes the metal oxide charge neutral; A is an element selected from the f block lanthanide elements; A' is an element selected from Be, Mg, Ca, Sr, Ba and Ra; A" is an element selected from the f block lanthanides or Be, Mg, Ca, Sr, Ba and Ra; B is an element selected from the group consisting of Al, Ga, In or mixtures thereof; and B' and B" are different elements and are independently selected from the group of elements Mg or the d-block transition elements. The invention also provides methods for oxygen separation and oxygen enrichment of oxygen deficient gases which employ mixed conducting metal oxides of the above formula. Examples of the materials used for the preparation of the membrane include A.sub.x Sr.sub.x' B.sub.y Fe.sub.y' Co.sub.2-(y+y') O.sub.5+z, where x is about 0.3 to about 0.5, x' is about 1.5 to about 1.7, y is 0.6, y' is between about 1.0 and 1.4 and B is Ga or Al.

Report Numbers

E 1.99:us 6165431
us 6165431

Other Subject(s)

Methods Separating Oxygen Oxygen-Containing Gases Provides Mixed Conducting Metal Oxides Particularly Useful Manufacture Catalytic Membranes Gas-Phase Oxygen Separation Processes Materials Formula 2- 2- Z Equal Equal Z Makes Metal Oxide Charge Neutral Element Selected Block Lanthanide Elements Element Selected Mg Sr Element Selected Block Lanthanides Mg Sr Element Selected Consisting Mixtures Elements Independently Selected Elements Mg D-Block Transition Elements Provides Methods Oxygen Separation Oxygen Enrichment Oxygen Deficient Gases Employ Mixed Conducting Metal Oxides Formula Examples Materials Preparation Membrane Sr 2- Z Separation Processes Mixed Conducting Mixed Conducting Oxygen Enrichment Containing Gases Provides Methods Independently Selected Catalytic Membrane Separation Process Oxygen-Containing Gas Metal Oxide Metal Oxide Metal Oxide Particularly Useful Metal Oxides Metal Oxides Element Selected Element Selected Element Selected Element Selected Containing Gas Separating Oxygen Transition Elements Transition Element Oxygen Separation Oxygen Separation Charge Neutral Oxygen-Containing Gases Conducting Metal Conducting Metal

Note

Published through SciTech Connect.
01/01/2000.
"us 6165431"
Schwartz, Michael; Sammells, Anthony F.; Mackay, Richard.
Eltron Research, Inc., Boulder, CO

Funding Information

FG03-96ER82215

View MARC record | catkey: 14404655