초록 ▼

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 f

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+δ,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 δ is a number where 0≤δ<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.

대표청구항 ▼

1. A dense single-phase membrane having both high ionic and electronic conductivity and capable of separating oxygen from an oxygen-containing gaseous mixture, wherein the membrane comprises a mixed metal oxide material with interstitial oxygen excess represented by the formula: AyA'y'A"y"BxB'x'B"x"

1. A dense single-phase membrane having both high ionic and electronic conductivity and capable of separating oxygen from an oxygen-containing gaseous mixture, wherein 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+δ where A, A' and A" are selected from group 1, 2 and 3 and the lanthanides; and B, B', B" and B'" are selected 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 δ is a number where 0≤δ2NiF4structure. 3. A dense single-phase membrane according to claim 1, wherein A, A' and A" are selected from group 2, 3 and the lanthanide metals. 4. A dense single-phase membrane according to claim 1, wherein the membrane comprises a mixed metal oxide material having a K2NiF4structure represented by the formula: La2Ni1-xBxO4+δ wherein x is between 0 and 1 and B is selected from nickel, iron, cobalt and copper. 5. A method for production of pure oxygen, which comprises bringing an oxygen-containing gas in contact with the membrane of claim 1, passing oxygen ions through the membrane, and oxidizing the oxygen ions to produce oxygen gas. 6. A method for oxygen enrichment of a sweep gas for fossil energy conversion, which comprises bringing an oxygen-containing gas in contact with the membrane of claim 1, passing oxygen ions through the membrane, oxidizing the oxygen ions to produce oxygen gas, and enriching the sweep gas with the oxygen gas. 7. A method for oxygen enrichment of a sweep gas for application in synthesis gas production, which comprises bringing an oxygen-containing gas in contact with the membrane of claim 1, passing oxygen ions through the membrane, oxidizing the oxygen ions to produce oxygen gas, and enriching the sweep gas with the oxygen gas. 8. A method for production of oxygen for application in a catalytic or non-catalytic process wherein oxygen is a reactant, which comprises bringing an oxygen-containing gas in contact with the membrane of claim 1, passing oxygen ions through the membrane, oxidizing the oxygen ions to produce oxygen gas, and introducing the oxygen gas into the catalytic or non-catalytic process.