The effect of coexisting gases upon H permeation through a Ti-Ni-Pd membrane was studied. It was found that N, CO2 and He did not influence H permeation

through the dense membrane. However, CO influenced the H flux at 400 to 500C. The results showed that, at low CO concentrations (with up-stream H2 >80%), the H flux through the membrane decreased faster than linearly while, with up-stream H2 <80%, the slope was linear but lower than the theoretical one.

Ti-Ni-Pd Dense Membranes - the Effect of the Gas Mixtures on the Hydrogen Permeation. A.Basile, F.Gallucci, A.Iulianelli, G.F.Tereschenko, M.M.Ermilova, N.V.Orekhova: Journal of Membrane Science, 2008, 310[1-2], 44-50