| 摘要 |
PROBLEM TO BE SOLVED: To provide a hydrogen separation membrane having high hydrogen separation performance and passing-through speed, with little restriction for using environment. SOLUTION: The outer circumferential face of a porous support 12 of the hydrogen separation membrane 10 is covered with a compact membrane 14, while the silica-based material of a thin thickness selectively allows only hydrogen to pass through in the thickness direction and no other gases. The hydrogen passing performance of the silica-based material is enhanced as the passing resistance becomes lower with the thinner membrane thickness. Thereby, the hydrogen separation membrane 10 provided with the membrane 14 consisting of the thin silica-based material of 1-200 nm thickness on the outer circumferential face of the support 12, selectively allows only hydrogen to pass with a high speed to provide the high hydrogen separation performance and passing-through speed. Since the support 12 and membrane 14 are composed of ceramics, the hydrogen separation membrane 10 is hardly deteriorated even in a high temperature atmosphere or in a steam atmosphere, having characteristics with little restriction for using environment. COPYRIGHT: (C)2007,JPO&INPIT
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