HYDROGEN PERMEABLE MEMBRANE INCLUDING OF PdCu ALLOY AND METHOD FOR PURIFYING HYDROGEN WITH HYDROGEN PERMEABLE MEMBRANE
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United States of America
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Issued Date -
Nov 21, 2024
app pub date -
Aug 22, 2022
filing date -
Aug 22, 2022
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Abstract
A hydrogen permeable membrane that includes a PdCu alloy and can be used for hydrogen purification. The hydrogen permeable membrane includes 38.75 mass % or more and 39.5 mass % or less of Cu with the balance being Pd and inevitable impurities as the PdCu alloy, and the area percentage of a β phase on an arbitrary cross section is 95% or more. The hydrogen permeable membrane of the present invention has a hydrogen permeability coefficient ϕ of 2.0×10−8 mol/m·S·Pa1/2 or more at any temperature in a temperature range of 150° C. or higher and 350°° C. or lower. This value exceeds the hydrogen permeability coefficient of a PdCu alloy membrane containing Cu concentration of 40 mass %, which has been thus far considered to be optimal, demonstrating that the present invention is excellent in terms of hydrogen permeability.
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