Long-term stability of thin-film Pd-based supported membranes

Niek de Nooijer, Alba Arratibel Plazaola, Jon Meléndez Rey, Ekain Fernandez, David Alfredo Pacheco Tanaka, Martin van Sint Annaland, Fausto Gallucci (Corresponding author)

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Membrane reactors have demonstrated a large potential for the production of hydrogen via reforming of different feedstocks in comparison with other reactor types. However, the long-term performance and stability of the applied membranes are extremely important for the possible industrial exploitation of these reactors. This study investigates the long-term stability of thin-film Pd-Ag membranes supported on porous Al 2 O 3 supports. The stability of five similarly prepared membranes have been investigated for 2650 h, up to 600 °C and in fluidized bed conditions. Results show the importance and the contribution of the sealing of the membranes at temperatures up to 500 °C. At higher temperatures the membranes surface deformation results in pinhole formation and a consequent decrease in selectivity. Stable operation of the membranes in a fluidized bed is observed up to 450 °C, however, at higher temperatures the scouring action of the particles under fluidization causes significant deformation of the palladium surface resulting in a decreased selectivity.

Original languageEnglish
Article number106
Number of pages23
Issue number2
Publication statusPublished - 1 Feb 2019


  • Fluidized bed
  • Hydrogen production
  • Membrane reactors
  • Membrane stability
  • Palladium based membranes


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