Asymmetry of Hydrogen Transfer through a Composite Membrane

Asymmetry of Hydrogen Transfer through a Composite Membrane Hydrogen mass transfer through a composite membrane represented by a film of palladium (or its alloys) applied onto a porous substrate has been studied. The hydrogen flux through the composite membrane has been shown to be governed by the ratio between the diffusion permeabilities of the film and the porous substrate, the mechanism of the transfer through the film, and the external pressure. It has been found that the intensity of hydrogen transfer through the composite membrane may depend on the transfer direction. The transfer is most asymmetric when the diffusion permeabilities of both layers are close and the hydrogen transfer in the film is limited by diffusion. At the same time, the transfer asymmetry effect does not arise when the hydrogen transfer in the film is limited by adsorption processes on its surface. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Colloid Journal Springer Journals

Asymmetry of Hydrogen Transfer through a Composite Membrane

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Publisher
Springer Journals
Copyright
Copyright © 2018 by Pleiades Publishing, Ltd.
Subject
Chemistry; Polymer Sciences; Surfaces and Interfaces, Thin Films
ISSN
1061-933X
eISSN
1608-3067
D.O.I.
10.1134/S1061933X18030158
Publisher site
See Article on Publisher Site

Abstract

Hydrogen mass transfer through a composite membrane represented by a film of palladium (or its alloys) applied onto a porous substrate has been studied. The hydrogen flux through the composite membrane has been shown to be governed by the ratio between the diffusion permeabilities of the film and the porous substrate, the mechanism of the transfer through the film, and the external pressure. It has been found that the intensity of hydrogen transfer through the composite membrane may depend on the transfer direction. The transfer is most asymmetric when the diffusion permeabilities of both layers are close and the hydrogen transfer in the film is limited by diffusion. At the same time, the transfer asymmetry effect does not arise when the hydrogen transfer in the film is limited by adsorption processes on its surface.

Journal

Colloid JournalSpringer Journals

Published: Jun 1, 2018

References

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