Solid state proton and electron mediating membrane and use in catalytic membrane reactors
This invention provides catalytic proton and electron mediating membranes useful in catalytic reactors. The membranes have an oxidation and a reduction surface and comprise a single-phase mixed metal oxide material of the formula: AB{sub 1{minus}x}B{prime}{sub x}O{sub 3{minus}y} wherein A is selected from Ca, Sr or Ba ions; B is selected from Ce, Tb, Pr, or Th ions; B{prime} is selected from Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Al, Ga, or In ions, or combinations thereof; and x is greater than or equal to 0.02 and less than or equal to 0.5. The membranes can further comprise a catalyst on either the oxidation or reduction surface, or both. Membranes include those which are fabricated by combining powders of metal oxides or metal carbonates of metal A ion, metal B ion and metal B{prime} ion such that the stoichiometric ratio A:B:B{prime} is 1:1{minus}x:x where 0.2{<=}{times}0.5, repeatedly calcining and milling the combined powders until a single-phase material is obtained and pressing and sintering the single phase material to obtain a membrane. 6 figs.
- Research Organization:
- Eltron Research Inc
- Sponsoring Organization:
- USDOE, Washington, DC (United States); National Science Foundation, Washington, DC (United States)
- DOE Contract Number:
- FG02-91ER81165
- Assignee:
- Eltron Research, Inc., Boulder, CO (United States)
- Patent Number(s):
- US 5,821,185/A/
- Application Number:
- PAN: 8-492,949; CNN: Contract 111-9260336
- OSTI ID:
- 675814
- Resource Relation:
- Other Information: PBD: 13 Oct 1998
- Country of Publication:
- United States
- Language:
- English
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Solid state proton and electron mediating membrane and use in catalytic membrane reactors
Solid state proton and electron mediating membrane and use in catalytic membrane reactors