Metal gas separation membrane
AssigneeSiemens Westinghouse Power Corporation
InventorsMary Anne Alvin, Jason Ryan Babcock
Life of this patent
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Abstract
A high temperature hydrogen gas separation membrane employing a physically interlocking barrier layer to form a spinel or intermetallic architecture bonding the metal barrier layer onto the surface of a fibrous metal medial structural support substrate. A tantalum/niobium interface layer is deposited on the barrier layer. The final layer is a precious metal such as palladium, which is deposited on the tantalum/niobium interface layer.
Claims8
A method of separating hydrogen gas from a gas stream, said method comprising the steps of:
- flowing the gas stream into contact with a chemisorption-dissociation-diffusion coating supported on a transmission member, the transmission member including a porous body of metal particles compacted and bonded together;
- diffusing disassociated hydrogen through a tantalum/niobium interface layer disposed between the chemisorption-dissociation-diffusion coating and a barrier layer
- diffusing dissociated hydrogen through the barrier layer, interposed between the transmission member and the tantalum/niobium interface layer;
- and
- exhausting hydrogen gas out of an opposite surface of the transmission member.
A gas separation membrane for separating hydrogen from a gas stream, the gas separation membrane comprising:
- a transmission member including a porous body of metal particles of a high temperature nickel based alloy compacted and bonded together the porous body having a first surface and a second surface opposite one another, the metal particles including a quantity of at least one of metal fibers and metal powder;
- a barrier layer being disposed on and bonded to the first surface to form a physical interlocking and spinel or intermetallic architecture;
- a chemisorption-dissociation-diffusion coating being disposed on the barrier layer;
- and
- the gas separation membrane being structured to receive the gas stream against one of the chemisorption-dissociation-diffusion coating and the second surface and permeate a quantity of hydrogen through the gas separation membrane and out of the other of the chemisorption-dissociation-diffusion coating and the second surface, the chemisorption-dissociation-diffusion coating being structured to permit chemisorption-dissociation-diffusion of hydrogen therethrough.
Dependencies are inferred from the claim text.