| 摘要 |
Permeable membrane porous substrate and a functional layer provided on the surface of and/or inside the porous substrate, the functional layer having a hydrogen permeation rate of 1x10-10 mol/s.m2.Pa or more, and satisfying at least one of the following properties (1) through (3):(1) Hydrogen is selectively caused to permeate preferentially to water vapor.(2) When a test tube containing ethylene glycol and sealed with the permeable membrane is placed in a 85° C. oven, the ethylene glycol decrease rate measured is 1x10-2 g/hour or less, per square centimeter (1 cm2) of the permeable membrane.(3) When a test tube containing 5% ammonium adipate ethylene glycol solution and sealed with the permeable membrane is placed in a 85° C. oven for 2 days, the acid quantity of the solution is 5x10-3 equivalent or less, per square centimeter of the permeable membrane.
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