Hydrogen & Clean Fuels - Abstract
Evaluation of Tantalum-Based Material for Hydrogen Separation at Elevated Temperatures and Pressures
The hydrogen permeability of bulk tantalum and tantalum coated with thin films of palladium was measured at temperatures from 623 to 1173 K and hydrogen partial pressures from 0.1 to 2.6 MPa in a flowing gas system.
Palladium coatings were deposited by both electroless plating (1-2 µl thick Pd layer) and cold plasma-discharge sputtering with two different thicknesses, 0.04 or 1.2 µm. All samples studied showed declining permeability values with surface fouling over time.