Hydrogen Permeation and Chemical Stability of a Ni-BaCe_(0.6)Zr_(0.2)Nd_(0.2)O_(3-δ) Cermet Membrane

A new Ni-BaCe0.6Zr0.2Nd0.2O3-δ(Ni-BZCN6) cermet membrane was investigated to separate hydrogen from hydrogen-containing mixtures.Hydrogen permeation properties of the membrane and permeation stability under atmospheres containing CO2 and H2O were in-vestigated under different conditions.Hydrogen permeation flux increases with increasing temperature.When the feed gas was moistened by 3% H2O, the flux was about 2-5 times that not moistened.It reached 0.073 cm3/(min cm2) at 900 °C when a wet feed gas of 80% H2/He was used.After 100 h operation under 30% CO2, the membrane still keeps a steady permeation flux.These results suggest that the Ni-BZCN6 membrane is suitable for hydrogen separation from mixed gas containing H2 and CO2.