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

Abstract

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.

Inventors:
; ;
Issue Date:
Research Org.:
Eltron Research Inc
Sponsoring Org.:
USDOE, Washington, DC (United States); National Science Foundation, Washington, DC (United States)
OSTI Identifier:
675814
Patent Number(s):
5,821,185
Application Number:
PAN: 8-492,949; CNN: Contract 111-9260336
Assignee:
Eltron Research, Inc., Boulder, CO (United States) PTO; SCA: 320303; 360201; PA: EDB-99:002020; SN: 98002028019
DOE Contract Number:  
FG02-91ER81165
Resource Type:
Patent
Resource Relation:
Other Information: PBD: 13 Oct 1998
Country of Publication:
United States
Language:
English
Subject:
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; 36 MATERIALS SCIENCE; CHEMICAL REACTORS; MEMBRANES; CATALYSTS; REDOX REACTIONS; CERAMICS; CHEMICAL COMPOSITION; CHEMICAL PREPARATION; POWDER METALLURGY; FABRICATION

Citation Formats

White, J.H., Schwartz, M., and Sammells, A.F. Solid state proton and electron mediating membrane and use in catalytic membrane reactors. United States: N. p., 1998. Web.
White, J.H., Schwartz, M., & Sammells, A.F. Solid state proton and electron mediating membrane and use in catalytic membrane reactors. United States.
White, J.H., Schwartz, M., and Sammells, A.F. Tue . "Solid state proton and electron mediating membrane and use in catalytic membrane reactors". United States.
@article{osti_675814,
title = {Solid state proton and electron mediating membrane and use in catalytic membrane reactors},
author = {White, J.H. and Schwartz, M. and Sammells, A.F.},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1998},
month = {10}
}