FUEL 237 |
| Thin self-supported permeable membranes of palladium alloys such as Pd60Cu40 have many applications in which hydrogen separation is required. High permeability membranes have been fabricated by magnetron sputtering onto a pretreated silicon substrate followed by lift-off to form free standing high quality films of controllable alloy composition down to 3 µm in thickness. Using these methods, Pd60Cu40 membranes 12 inches in diameter have been made with thicknesses ranging from 2 to 15 microns. The highest flux recorded was 242 SCFH/ft2 with a 2 µm thick Pd53Cu47 at 400 °C and 20 psig feed pressure which when extrapolated is over twice the 2010 Department of Energy pure H2 flux target. Several membranes have been made with the same permeability, but with different thicknesses and these membranes are highly selective. The fabrication process, hydrogen separation performance, and physical property characteristics of these vacuum deposited palladium alloys for hydrogen separation will be discussed. |
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Inorganic Membranes for Energy and Environmental Applications
1:30 PM-6:30 PM, Wednesday, August 22, 2007 Boston Park Plaza -- Chartes River Room, Oral
Division of Fuel Chemistry |