Norskhydro Asa

Rita Glenne

Stein Julsrud

Bent Erlend Vigeland

Turid Breivik

The present invention relates to a dense single-phase membrane having both high ionic and electronic conductivity and capable of separating oxygen from an oxygen containing gaseous mixture, where the membrane comprises a mixed metal oxide material with interstitial oxygen excess represented by the formula A A&prime; A&Prime; B B&prime; B&Prime; B&prime;&Prime; O , where A, A&prime; and A&Prime; are chosen from group 1, 2 and 3 and the lanthanides; and B, B&prime;, B&Prime; and B&prime;&Prime; are chosen from the transition metals according to the periodic table of the elements adopted by IUPAC wherein 0&lE;y&lE;2, 0&lE;y&prime;&lE;2, 0&lE;y&Prime;&lE;2, 0&lE;x&lE;1, 0&lE;x&prime;&lE;1, 0&lE;x&Prime;&lE;1, 0&lE;x&prime;&Prime;&lE;1, and x and y each represents a number such that y&plus;y&prime;&plus;y&Prime;&equals;2, x&plus;x&prime;&plus;x&Prime;&plus;x&prime;&Prime;&equals;1, and &dgr; is a number where 0&lE;&dgr;<1 quantifying the oxygen excess. Furthermore, the invention relates to a use of the membrane for production of pure oxygen, oxygen enrichment of a sweep gas for fossil energy conversion, for synthesis gas production and for production of oxygen for application in any catalytic or non-catalytic processes wherein oxygen is one of the reactants.

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Porsgrunn, Norway

Rita Glenne