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AssigneeInstitut Francais du Petrole
InventorsPaul Broutin, Andre Buisson, Philippe Legoit
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A device for separating hydrogen from gaseous mixtures containing it or for purifying gaseous hydrogen, comprising an outer casing (2) fiIled with a plurality of tubes (3) made of a suitable palladium based alloy, which tubes are closed at one end (4). The tubes are fixed in substantially seal-tight manner, at the open end side (5), to a part at least of a base (6) made of a metal alloy, the composition of which is such that its expansion coefficient in hydrogen is substantially equal to that of the alloy of the tubes. The base can be integrally formed and made of the above-mentioned alloy, or it can comprise a ring of substantially the same composition as that of the tubes adhering thereto by way of an autogenous soldering.
A device for separating hydrogen in gaseous mixtures or for purifying gaseous hydrogen, comprising an outer casing (2) enclosing at least one tube (3) made of a hydrogen-permeable palladium base alloy, wherein at least one of the ends of the at least one tube (3) is fixed in a substantially sealtight manner to a part, at least, of a base (6) having at least one hole therein for enclosing said at least one end, said base being made of a metal alloy of a composition such that said metal alloy has an expansion coefficient in hydrogen substantially equal to that of the palladium-based alloy of the tube, said fixed tube having an external diameter less than the internal diameter of said at least one hole.
A device for separating hydrogen and gaseous mixtures or for purifying gaseous hydrogen, comprising an outer casing (2) enclosing at least one tube (3) made of an appropriate palladium-based alloy, wherein at least one of the ends of the at least one tube (3) is fixed in a substantially sealtight manner to a part, at least, of a base (6) made of a metal alloy having a composition such that said metal alloy has an expansion coefficient in hydrogen substantially equal to that of the palladium-based alloy of the tube and wherein the base comprises two parts, a first part (14), which is of substantially the same composition as said at least one tube and which encloses said at least one tube, and a second part, which is metal or formed from a second alloy of different composition from that of the alloy forming the first part, said parts of the base adhering to one another in a substantially sealtight manner.
Dependencies are inferred from the claim text.