Long-Term Stability of Thin-Film Pd-Based Supported Membranes

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 exploitatio...

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Bibliographic Details
Published in:Processes 2019-02, Vol.7 (2), p.106
Main Authors: Nooijer, Niek, Arratibel Plazaola, Alba, Meléndez Rey, Jon, Fernandez, Ekain, Pacheco Tanaka, David, Sint Annaland, Martin, Gallucci, Fausto
Format: Article
Language:English
Subjects:
Alloys
Aluminum oxide
Deformation mechanisms
Fluidized beds
Hydrogen
Hydrogen production
Investigations
Membrane reactors
Membranes
Natural gas
Palladium
Pinholes
Reactors
Reforming
Selectivity
Silver
Stability
Thin films
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Summary: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 Al2O3 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.
ISSN:2227-9717
2227-9717
DOI:10.3390/pr7020106