Abstract
The hydrogen flux degradation in hydrogen permeation tests of Pd/Nb30Ti35Co35 (at.%)/Pd composite membranes was experimentally investigated at temperatures from 400 to 650 °C. The hydrogen fluxes through the Pd/Nb30Ti35Co35/Pd membranes during isothermal long-term hydrogen permeation tests above 500 °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.
Original language | English |
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Article number | 117922 |
Number of pages | 11 |
Journal | Journal of Membrane Science |
Volume | 601 |
DOIs | |
Publication status | Published - 1 Mar 2020 |
Keywords
- Aggregation
- Degradation
- Hydrogen permeability
- Interdiffusion
- Pd/NbTiCo/Pd