Palladium-coated Vanadium-alloy membranes for Hydrogen Separation.

Conference · Fri Dec 31 23:00:00 EST 2004

OSTI ID:978003

Paglieri, S N ^[1]; Pesiri, D R ^[2]; Dye, R C ^[3]; Birdsell, S A ^[4]; Snow, R C ^[5]

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1. Stephen N.
2. David R.
3. Robert C.
4. Stephen A.
5. Ronny C.

Hydrogen-separating membranes have the potential to generate pure hydrogen from abundant fossil fuel supplies such as coal, for use in fuel cells. Foils of V{sub 0.95}Ti{sub 0.05} and V{sub 0.88}Cu{sub 0.12} (at. %) coated with thin films of Pd or Pd alloy (Pd-Ag) were fabricated and tested for hydrogen permeability and stability during operation at temperatures from 320-450 C. Vanadium-alloy foils were ion-milled and coatings between 50 and 200 nm thick were applied to both sides insitu, via electron beam evaporation PVD. The membranes were completely permselective for hydrogen. Hydrogen flux stability was dependent on palladium coating thickness, with constant flux observed during tests at 350 C, and slow decline observed at 400 C that accelerated at higher temperatures.

• Research Organization: Los Alamos National Laboratory
• Sponsoring Organization: DOE
• OSTI ID: 978003
• Report Number(s): LA-UR-05-6246
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
08 HYDROGEN
29 ENERGY PLANNING, POLICY, AND ECONOMY
30 DIRECT ENERGY CONVERSION
ALLOYS
COAL
COATINGS
ELECTRON BEAMS
EVAPORATION
FOSSIL FUELS
FUEL CELLS
HYDROGEN
MEMBRANES
PALLADIUM
PERMEABILITY
STABILITY
THICKNESS
THIN FILMS