The Role of the Thermodynamic Factor in Hydrogen Diffusion in Metal and Alloy Membranes
2014 ◽
Vol 349
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pp. 1-23
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Keyword(s):
The role of the thermodynamic factor in determining the magnitude of Ficks diffusion constant, DH, for H in metals and alloys is discussed using mainly Pd and its fcc alloys as examples because data are available for some of these systems over a wide range of H contents. Procedures are given for obtaining DH*, the concentration-independent diffusion constant, from DH under permeation conditions where the H concentration varies through the membrane; which is the common situation for H2purification membranes where pupstream>> pdownstream. The role of the thermodynamic factor in H diffusion through multi-layer membranes will also be discussed.
2020 ◽
Vol 21
(6)
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pp. 2099
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Keyword(s):
2019 ◽
Vol XLII-4/W18
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pp. 1153-1157
Keyword(s):
2018 ◽
Vol 6
(2)
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pp. 196
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2006 ◽
Vol 22
(1)
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pp. 63-129
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Keyword(s):
2013 ◽
Vol 14
(3)
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pp. 61-67
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Keyword(s):
Keyword(s):