Hydrogen transport through tubular membranes of palladium-coated tantalum and niobium
- Michigan State Univ., East Lansing, MI (United States). Chemical Engineering Dept.
Palladium-based membranes have been used for decades in hydrogen extraction because of their high permeability and good surface properties and because palladium, like all metals, is 100% selective for hydrogen transport. The authors describe experiments with hydrogen-extraction membranes made of palladium-coated niobium and tantalum heat-exchanger tubers. The cost was about $45/ft of 3/8 inch tubular membrane, and the fluxes were as high as 0.001 47 mol/m{sup 2} s Pa{sup 1/2} at 420 C. The main transport resistance is in the refractory metal substrate. Durability tests showed a 15% reduction in flux for 31 days of continuous membrane operation. Assuming durability is maintained for at least 1 year, this price and flux should allow competitive application for hydrogen recovery in petrochemical plants and for membrane reactors.
- DOE Contract Number:
- FG02-93ER81625
- OSTI ID:
- 212210
- Journal Information:
- Industrial and Engineering Chemistry Research, Vol. 35, Issue 2; Other Information: PBD: Feb 1996
- Country of Publication:
- United States
- Language:
- English
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