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Processes 2019, 7(2), 106;

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

Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, De Rondom 70, 5612 AZ Eindhoven, The Netherlands
Tecnalia Energy and Environment Division. Mikeletegi Pasealekua 2, 20009 San Sebastian-Donostia, Spain
Author to whom correspondence should be addressed.
Received: 16 January 2019 / Revised: 1 February 2019 / Accepted: 13 February 2019 / Published: 16 February 2019
(This article belongs to the Special Issue Catalysis in Membrane Reactors)
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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 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. View Full-Text
Keywords: Palladium based membranes; membrane stability; membrane reactors; fluidized bed; hydrogen production Palladium based membranes; membrane stability; membrane reactors; fluidized bed; hydrogen production

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Nooijer, N.; Arratibel Plazaola, A.; Meléndez Rey, J.; Fernandez, E.; Pacheco Tanaka, D.A.; Sint Annaland, M.; Gallucci, F. Long-Term Stability of Thin-Film Pd-Based Supported Membranes. Processes 2019, 7, 106.

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