Composite oxygen transport membrane
US9486735B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 16, 2015 |
| Grant date | Nov 8, 2016 |
| Priority date | — |
| Expiry date | Sep 16, 2035 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24999
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method is described of producing a composite oxygen ion membrane and a composite oxygen ion membrane in which a porous fuel oxidation layer and a dense separation layer and optionally, a porous surface exchange layer are formed on a porous support from mixtures of (Ln1-xAx)wCr1-yByO3-δ and a doped zirconia. Preferred materials are (La0.8Sr0.2)0.95Cr0.7Fe0.3O3-δ for the porous fuel oxidation layer, (La0.8Sr0.2)0.95Cr0.5Fe0.5O3-δ for the dense separation layer, and (La0.8Sr0.2)0.95Cr0.3Fe0.7O3-δ for the porous surface exchange layer. Firing the said fuel activation and separation layers in nitrogen atmosphere unexpectedly allows the separation layer to sinter into a fully densified mass.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.