Abstract
Hydrogen transport by 100-μm-thick vanadium and palladium membranes was studied in the pressure range from 1 × 10−8 to 4.5 × 10−1 MPa at a temperature of 400°C. Both sides of the vanadium membrane were covered by 2 μm of palladium (Pd-V-Pd) for facilitating the dissociative absorption and associative desorption of H2 molecules. At low pressures, hydrogen flux densities through vanadium and palladium membranes are nearly the same; at high pressures, the flux through the vanadium membrane becomes 16 times larger than the flux through the palladium membrane and attains a value of 2.4 scc cm−2 s−1. This flux of permeating hydrogen is larger than all values ever observed earlier for membranes made of group 5 metals or any other unsupported metal membranes.
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Original Russian Text © V.N. Alimov, A.O. Busnyuk, M.E. Notkin, A.I. Livshits, 2014, published in Pis’ma v Zhurnal Tekhnicheskoi Fiziki, 2014, Vol. 40, No. 5, pp. 88–94.
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Alimov, V.N., Busnyuk, A.O., Notkin, M.E. et al. Hydrogen transport by group 5 metals: Achieving the maximal flux density through a vanadium membrane. Tech. Phys. Lett. 40, 228–230 (2014). https://doi.org/10.1134/S1063785014030031
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DOI: https://doi.org/10.1134/S1063785014030031