| 摘要 |
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 AyA'y'A''y''BxB'x'B''x''B'''x'''O4+delta, where A, A' and A'' are chosen from group 1, 2 and 3 and the lanthanides; and B, B', B'' and B''' are chosen from the transition metals according to the periodic table of the elements adopted by IUPAC wherein 0<=y<=2, 0<=y'<=2, 0<=y''<=2, 0<=x<=1, 0<=x'<=1, 0<=x''<=1, 0<=x'''<=1, and x and y each represents a number such that y+y'+y''=2, x+x'+x''+x'''=1, and delta is a number where 0<=delta<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. |
