Degradation of Pd/Nb30Ti35Co35/Pd hydrogen permeable membrane: a numerical description

Xiao Liang, Xinzhong Li (Corresponding author), Hiromi Nagaumi, Jingjie Guo, Fausto Gallucci, Martin van Sint Annaland, Dongmei Liu (Corresponding author)

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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 languageEnglish
Article number117922
Number of pages11
JournalJournal of Membrane Science
Volume601
DOIs
Publication statusPublished - 1 Mar 2020

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Keywords

  • Aggregation
  • Degradation
  • Hydrogen permeability
  • Interdiffusion
  • Pd/NbTiCo/Pd

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