Hydrogen permeation properties of Pd-coated V89.8Cr10Y0.2 alloy membrane using WGS reaction gases

The influence of co-existing gases on the hydrogen permeation was studied through a Pd-coated V89.8Cr10Y0.2 alloy membrane. Preliminary hydrogen permeation experiments have been confirmed that hydrogen flux was 6.26 ml/min/cm2 for a Pd-coated V89.8Cr10Y0.2 alloy membrane (thick: 0.5 mm) using pure hydrogen as feed gas. Also, the hydrogen permeation flux decreased with decrease of hydrogen partial pressure at constant pressure when H2/CO2 and H2/CO2/H2S mixture applied as feed gas respectively and permeation fluxes were satisfied with Sievert's law in different feed conditions. It was found from XRD and SEM results after permeation test that the Pd-coated V89.8Cr10Y0.2 alloy membrane had good stability and durability for various mixture feeding conditions.

► The V89.8Cr10Y0.2 alloy membranes were fabricated successfully.
► The effect of feeding condition on the hydrogen permeation was investigated.
► The V89.8Cr10Y0.2 membrane showed a maximum flux of 6.26 ml/min/cm2 at 400 °C.
► The V89.8Cr10Y0.2 membrane showed an excellent stability and durability.