Hydrogen Permeation Properties and Chemical Stability of Novel Pd-Free Alloy Membranes Based on the V-Y System

Abstract

No investigation has yet been accomplished to screen the yttrium-doped effects on vanadium-based metal membranes. Synthesis, hydrogen permeation properties, and chemical stability of a novel palladium (Pd)-coated V99Y1 alloy membrane are presented. Hydrogen permeation experiments have been performed to investigate the hydrogen transport properties through the Pd-coated V99Y1 alloy membrane in the pressure range of 1.53.0 bar under pure hydrogen as well as H2-CO2 and H2-CO gas mixtures at 400 degrees C. The maximum hydrogen permeation rate was similar to 32mLmin1cm2 for a 0.5mm thick membrane under pure hydrogen. The results offer new directions in the synthesis of novel non-Pd-based metal membranes for hydrogen separation in precombustion capture applications.