Ion transport membranes with catalyzed dense layer

Details Ion transport membranes with catalyzed dense layer Ion transport membranes with catalyzed dense layer

1994-01-12

1996-10-29

Pal, Asok

Catalyst, solid sorbent, or support therefor: product or process

In form of a membrane

95 54, 96 4, B01J 3510, B01J 2028

Patent

active

055696333

ABSTRACT:
The present invention relates to surface catalyzed ion transport membranes which demonstrate superior oxygen flux. The membranes comprise a dense multicomponent metallic oxide layer having a first surface and a second surface wherein the first surface is coated with a catalyst such as a metal or an oxide of a metal selected from Groups II, V, VI, VII, VIII, IX, X, XI, XV and the F Block lanthanides of the Periodic Table of the Elements. One or more porous layers formed from a mixed conducting multicomponent metallic oxide or a material which is not mixed conducting under process operating conditions may be formed contiguous to the second surface of the dense layer. The claimed membranes are capable of separating oxygen from oxygen-containing gaseous mixtures.

REFERENCES:
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patent: 5210059 (1993-05-01), Matturo et al.
patent: 5240473 (1993-08-01), Carolan et al.
patent: 5240480 (1993-08-01), Thorogood et al.
J. N. Armus, "Catalysis with Permselective Inorganic Membranes" Applied Catalysis, vol. 49, (1989), pp. 1-25.
Chany et al., "Formation of a Metastable Ordered Surface Phase Due to Competitive Diffusion & Absorption Kinetics: Oxygen on Pd.", Physical Review Letters, vol. 59, (1987), pp. 296-299.
Sekido et al., "Electric-Ionic Conductivity in Peroviskite-Type Oxides" Solid State Ionics, vol. 37, (1990), pp. 253-259.

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