High-performance boron-doped vanadium–aluminum alloy membranes for hydrogen separation

Abstract In this letter, our aim is to explore the properties of a new class of high-performance membranes for hydrogen separation applications prepared from boron-doped vanadium–aluminum alloys. In particular, we present the first hydrogen permeation characteristics of Pd-coated V99.8 − xAlxB0.2 (x = 0, 10) alloy membranes. Membranes have been investigated in the pressure range 1.5–3.0 bar under pure hydrogen and hydrogen–carbon dioxide gas mixture at 400 °C. Hydrogen flux is found on the order of 48 mL/min/cm2 for a Pd-coated V99.8B0.2 alloy membrane (thickness: 0.5 mm) using pure hydrogen as the feed gas.

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