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Hydrogen Purification using Ultra-Thin Palladium Films Supported on Porous Anodic Alumina Membranes

Published online by Cambridge University Press:  01 February 2011

Alexander Kirchner ,
Ian W.M. Brown ,
Mark E. Bowden  and
Tim Kemmitt
Alexander Kirchner
Affiliation:
[email protected], Industrial Research Ldt., MacDiarmid Institute, Gracefield Road, PO Box 31-310, Lower Hutt, N/A, New Zealand, ++ 64 4 931 3155
Ian W.M. Brown
Affiliation:
[email protected], MacDiarmid Institute for Advanced Materials and Nanotechnology, Industrial Research, PO Box 31-310, Lower Hutt, N/A, New Zealand
Mark E. Bowden
Affiliation:
[email protected], MacDiarmid Institute for Advanced Materials and Nanotechnology, Industrial Research, PO Box 31-310, Lower Hutt, N/A, New Zealand
Tim Kemmitt
Affiliation:
[email protected], MacDiarmid Institute for Advanced Materials and Nanotechnology, Industrial Research, PO Box 31-310, Lower Hutt, N/A, New Zealand
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Abstract

Nanostructured anodic alumina membranes have been utilized as high-temperature stable supports for 150 nm thick continuous palladium films. The palladium has been deposited by vacuum evaporation onto the rotating substrate. The thermal stability of the resulting compound membranes has been demonstrated for temperatures up to 700ºC under a reducing atmosphere. Hydrogen permeation has been measured up to 280ºC, where the permeability has a value of 2.5·10-7 mol m-2 s-1 Pa-1. At the same time the selectivity factor over carbon dioxide is at least 33.

Keywords

Pdfilmdiffusion
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1023: Symposium JJ – Functional Nanoscale Ceramics for Energy Systems , 2007 , 1023-JJ09-02
Copyright
Copyright © Materials Research Society 2007

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