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

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URI: http://hdl.handle.net/11556/700
ESSN: 2227-9717
DOI: 10.3390/pr7020106
Publication date
2019-02-01
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MDPI AG
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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.
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Palladium based membranes , Membrane stability , Membrane reactors , Fluidized bed , Hydrogen production
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journal article
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Nooijer, Niek, Alba Arratibel Plazaola, Jon Meléndez Rey, Ekain Fernandez, David Pacheco Tanaka, Martin Sint Annaland, and Fausto Gallucci. “Long-Term Stability of Thin-Film Pd-Based Supported Membranes.” Processes 7, no. 2 (February 16, 2019): 106. doi:10.3390/pr7020106.