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TitlePalladium coated porous anodic alumina membranes for gas reforming processes
Publication TypeJournal Article
Year of Publication2010
AuthorsWu, J.P., Brown I.W.M., Bowden M.E., and Kemmitt T.
JournalSolid State Sciences
Pagination1912 - 1916
Date Published2010
ISSN12932558 (ISSN)
KeywordsAcids, Aluminum foil, Anodisation, Carbon dioxide, Ceramic membranes, Chemical corrosion, Electroless deposition, Fast deposition, Gas permeable membranes, Gas separations, High efficiency, High purity, hydrogen, Hydrogen gas, Hydrogen selectivity, Hydrogen separation, Increased temperature, Metal film, Nanostructured ceramic, Nanostructured membranes, nitrogen, Palladium, Plating solutions, Porous anodic alumina, Porous anodic alumina membranes, Reforming process, Strong acids, Ultrathin coatings
AbstractNanostructured ceramic membranes with ultrathin coatings of palladium metal have been demonstrated to separate hydrogen gas from a gas mixture containing nitrogen with 10% carbon dioxide and 10% hydrogen at temperatures up to 550 °C. The mechanically robust and thermally durable membranes were fabricated using a combination of conventional and high-efficiency anodisation processes on high purity aluminium foils. A pH-neutral plating solution has also been developed to enable electroless deposition of palladium metal on templates which were normally prone to chemical corrosion in strong acid or base environment. Activation and thus seeding of palladium nuclei on the surface of the template were essential to ensure uniform and fast deposition, and the thickness of the metal film was controlled by time of deposition. The palladium coated membranes showed improved hydrogen selectivity with increased temperature as well as after prolonged exposure to hydrogen, demonstrating excellent potential for gas separation technologies. © 2010 Elsevier Masson SAS. All rights reserved.

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