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Effect of hydrogen-sulfide on the hydrogen permeance of palladium–copper alloys at elevated temperatures
The hydrogen permeance of several 0.1 mm thick Pd–Cu alloy foils (80 wt.% Pd–20 wt.% Cu, 60 wt.% Pd–40 wt.% Cu and 53 wt.% Pd–47 wt.% Cu) was evaluated using transient flux measurements at temperatures ranging from 603 to 1123 K and pressures up to 620 kPa both in the presence and absence of 1000 pp...
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Published in: | Journal of membrane science 2004-10, Vol.241 (2), p.219-224 |
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Main Authors: | , , , , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that cite this one |
Online Access: | Get full text |
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Summary: | The hydrogen permeance of several 0.1
mm thick Pd–Cu alloy foils (80
wt.% Pd–20
wt.% Cu, 60
wt.% Pd–40
wt.% Cu and 53
wt.% Pd–47
wt.% Cu) was evaluated using transient flux measurements at temperatures ranging from 603 to 1123
K and pressures up to 620
kPa both in the presence and absence of 1000
ppm H
2S. Sulfur resistance, as evidenced by no significant change in permeance, was correlated with the temperatures associated with the face-centered-cubic crystalline structure for the alloys in this study. The permeance of the body-centered cubic phase, however, was up to two orders of magnitude lower when exposed to H
2S. A smooth transition from sulfur poisoning to sulfur resistance with increasing temperature was correlated with the alloy transition from a body-centered-cubic structure to a face-centered-cubic structure. |
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ISSN: | 0376-7388 1873-3123 |
DOI: | 10.1016/j.memsci.2004.04.033 |