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Processes 2019, 7(2), 106; https://doi.org/10.3390/pr7020106

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

1
Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, De Rondom 70, 5612 AZ Eindhoven, The Netherlands
2
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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Abstract

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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