Journal
JOURNAL OF MEMBRANE SCIENCE
Volume 601, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.memsci.2020.117922
Keywords
Pd/Nb30Ti35Co35/Pd; Degradation; Hydrogen permeability; Aggregation; Interdiffusion
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Funding
- National Natural Science Foundation of China [51771066, 51571075, 51274077]
- program of China Scholarships Council
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The hydrogen flux degradation in hydrogen permeation tests of Pd/Nb30Ti35Co35 (at.%)/Pd composite membranes was experimentally investigated at temperatures from 400 to 650 degrees C. The hydrogen fluxes through the Pd/Nb30Ti35Co35/Pd membranes during isothermal long-term hydrogen permeation tests above 500 degrees C exhibit two hydrogen-flux-decline steps. The aggregation of the Pd-catalytic layer and the boundary layer formed between Pd and Nb30Ti35Co35 due to interdiffusion were experimentally confirmed contributing to the degradation of the hydrogen flux through the Pd/Nb30Ti35Co35/Pd membrane. Modelling work was carried out to reveal and validate the temperature-dependence of the two attributing factors to the degradation of hydrogen permeation flux.
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