Defectless hydrogen separation membrane, production method for defectless hydrogen separation membrane and hydrogen separation method
AssigneesJx Nippon Oil & Energy Corporation, National Institute of Advanced Industrial Science and Technology
InventorsYasuyuki Matsumura, Takashi Maeda, Minoru Ogawa, Eiji Negishi
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Abstract
A defect-free hydrogen separation membrane includes a metal thin membrane. The metal thin membrane includes a first metal layer composed of palladium on a porous support without substantial penetration into surface pores of the porous support and a second metal layer on the first metal layer. The second metal layer is a product of palladium deposition and closes defects being open on the surface of the first metal layer.
Claims19
A defect-free hydrogen separation membrane comprising a metal thin membrane including a first metal layer composed of palladium on a porous support without substantial penetration into surface pores of said porous support and a second metal layer on said first metal layer, wherein said second metal layer is a product of palladium deposition and closes defects being open on the surface of said first metal layer.
A defect-free hydrogen separation membrane comprising a metal thin membrane including a first metal layer, composed of at least one kind of metal forming a palladium alloy, on a porous support without substantial penetration into surface pores of said porous support and a second metal layer on said first metal layer wherein said second metal layer is a product of deposition of at least one kind of metal forming a palladium alloy and closes defects being open on the surface of said first metal layer.
A method for producing a defect-free hydrogen separation membrane, comprising:
- an activation step of immersing one surface of a porous support in a solution containing an activating metal;
- a first metal layer forming step of immersing said one surface of the porous support in a plating solution containing palladium ions to form a first metal layer containing palladium;
- and
- a pressure difference applying step of immersing said one surface of the porous support with said first metal layer in a plating solution containing palladium ions, such that a pressure at the one surface side of the porous support is higher than a pressure at the other surface side, wherein palladium closes defects being open on the surface of said first metal layer during deposition on the surface.
A method for producing a defect-free hydrogen separation membrane, comprising:
- an activation step of immersing one surface of a porous support in a solution containing an activating metal;
- a first metal layer forming step of immersing said one surface of the porous support in a plating solution containing metal ions forming a palladium alloy to form a first metal layer containing at least one kind of metal contained in the palladium alloy;
- and
- a pressure difference applying step of immersing said one surface of the porous support with said first metal layer in a plating solution containing palladium ions or metal ions forming the palladium alloy, such that a pressure at the one surface side of the porous support is higher than a pressure at the other surface side,
- wherein at least one kind of the metal forming the palladium alloy closes defects being open on the surface of said first metal layer during deposition on the surface.
Dependencies are inferred from the claim text.