Fluid separation devices capable of operating under high carbon dioxide partial pressures which utilize creep-resistant solid-state membranes formed from a mixed conducting multicomponent metallic oxide
US6056807A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 26, 1998 |
| Grant date | May 2, 2000 |
| Priority date | — |
| Expiry date | Jan 26, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2235/9669
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The present invention presents a fluid separation device capable of separating oxygen from an oxygen-containing gaseous mixture which utilizes at least one solid-state membrane comprising a dense mixed conducting multicomponent metallic oxide layer formed from a mixed conducting multicomponent metallic oxide represented by the formula EQU Ln.sub.x A'.sub.x A".sub.x B.sub.y B'.sub.y O.sub.3-z, wherein Ln is an element selected from the f block lanthanides, A' is selected from Group 2, A" is selected from Groups 1, 2 and 3 and the f block lanthanides, and B,B' are independently selected from the d block transition metals, excluding titanium and chromium, wherein 0.ltoreq.x<1, 0<x'.ltoreq.1, 0.ltoreq.x"<1, 0<y<1.1, 0.ltoreq.y'<1.1,x+x'+x"=1.0, 1.1>y+y'>1.0 and z is a number which renders the compound charge neutral. The subject mixed conducting multicomponent metallic oxides demonstrate improved resistance to degradation by carbon dioxide and sulfur dioxide and improved oxygen flux and reduced creep rates at operating temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.