B - Operations – Transporting – 01 – D
Patent
B - Operations, Transporting
01
D
183/2
B01D 53/22 (2006.01) B01D 59/14 (2006.01) C01B 3/50 (2006.01)
Patent
CA 1192847
Abstract of the Disclosure For separation of hydrogen and its isotopes from a gas mixture by diffusion through a membrane impermeable to other gases, a membrane of niobium and/or tantalum bases is provided on the gas access side with a coating of an alloy of palladium with at least 45 atomic % Cu or at least 50 atomic percent Ag or at least 7 atomic % Y. When the copper alloy coating is used, the mem- brane material is saturated with copper. Before such saturation, the membrane material is generally an alloy containing from 10 to 30% Ti, 3 to 10% V, 0 to 25% Nb and at least 30% Ta, all by weight, and preferably it is of a composition of 20 to 25% Ti, 5 to 7.5% V, 0 to 25% Nb and at least 50% Ta, being saturated with copper and/or silver, while a copper and/or silver palladium alloy coating is used. Such inherently oxidation sensitive membranes can be stabilized by provision of an internal intermediate layer in the form of a melt forming or containing an alkaline metal hydride or an alkaline earth metal hydride. A melt containing alkaline metal and/or alkaline earth metal which forms a hydride, brought into contact on the secondary side of a membrane in accordance with the invention, provides a hydrogen sink on the secondary side and mitigates internal hydride formation and secondary side oxidation of the membrane.
417510
Behr Friedrich
Schulten Rudolf
Weirich Walter
Kernforschungsanlage Julich Gesellschaft Mit Beschrankter Haftun
Smart & Biggar
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