“Superpermeability” and “pumping” of atomic hydrogen through palladium membranes

Permeation of atomic as well as molecular hydrogen through palladium membranes has been investigated experimentally in the temperature range from room temperature to 200 °C and at a higher incident flux of hydrogen atoms on palladium surface than in previous studies. The results demonstrate that phe...

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Bibliographic Details
Published inJournal of membrane science Vol. 320; no. 1; pp. 528 - 532
Main Authors Zheludkevich, M.L., Gusakov, A.G., Voropaev, A.G., Kozyrski, E.N., Raspopov, S.A., Vecher, A.A.
Format Journal Article
LanguageEnglish
Published Elsevier B.V 15.07.2008
Subjects
Atomic hydrogen
Palladium membrane
Permeation
Superpermeability
Thermodynamical model
Atomic hydrogen
Thermodynamical model
Superpermeability
Palladium membrane
Permeation
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Summary:Permeation of atomic as well as molecular hydrogen through palladium membranes has been investigated experimentally in the temperature range from room temperature to 200 °C and at a higher incident flux of hydrogen atoms on palladium surface than in previous studies. The results demonstrate that phenomena of ‘superpermeability’ and ‘pumping’ of atomic gases through metal membranes are of a common nature. A theoretical model based on chemical thermodynamics and diffusion theory adequately describes the quantitative relationships observed in experiments. It was found that permeability of atomic hydrogen depends strongly on the magnitude of surface incident flux and membrane temperature.
ISSN:0376-7388
1873-3123
DOI:10.1016/j.memsci.2008.04.045