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Title: Solid state proton and electron mediating membrane and use in catalytic membrane reactors

Patent ·
OSTI ID:871894
 [1];  [1];  [1]
  1. Boulder, CO
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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-x B'.sub.x O.sub.3-y wherein A is selected from Ca, Sr or Ba ions; B is selected from Ce, Tb, Pr, or Th ions; B' 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' ion such that the stoichiometric ratio A:B:B' is 1:1-x:x where 0.2.ltoreq..times.0.5, repeatedly calcining and milling the combined powders until a single-phase material is obtained and pressing and sintering the singlephase material to obtain a membrane.

Research Organization:
Eltron Research, Inc., Boulder, CO (United States)
DOE Contract Number:
FG02-91ER81165
Assignee:
Eltron Research, Inc. (Boulder, CO)
Patent Number(s):
US 5821185
OSTI ID:
871894
Country of Publication:
United States
Language:
English

References (6)

Evaluation of Cathode Materials for the Electrochemical Membrane  H 2 S  Separator journal June 1991
The electrochemical oxidative dimerization of methane journal July 1992
Construction and operation of fuel cells based on the solid electrolyte BaCeO3:Gd journal February 1991
Electrocatalytic Methane Dimerization with a Yb‐Doped SrCeO3 Solid Electrolyte journal June 1991
Electrochemical Methane Activation to C 2 -Hydrocarbons Using Protonic Conductor journal September 1992
Oxide ion conduction in ytterbium-doped strontium cerate journal September 1988

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