Composite membranes based on Ni and Zr-doped BaCeO3 were promising for

hydrogen separation. Such composites showed high proton conductivity and

adequate chemical stability in H2O and CO2, but may be unstable in H2S. Here, the

hydrogen permeation performance of Ni–BaZr0.1Ce0.7Y0.2O3−δ was measured in an

H2S-containing atmosphere at 900C. The hydrogen permeation flux began to

degrade in 60ppm H2S and decreased by about 45% in 300ppm H2S. After

hydrogen permeation tests, X-ray diffraction analysis revealed the formation of

BaS, doped CeO2, Ni3S2 and Ce2O2S. Analysis of the microstructure and phase

composition, and results of thermodynamic calculations suggested that reaction

between H2S and doped BaCeO3 caused the performance loss of the Ni–

BaZr0.1Ce0.7Y0.2O3−δ

Chemical Stability and Hydrogen Permeation Performance of Ni–

BaZr0.1Ce0.7Y0.2O3−δ in an H2S-Containing Atmosphere. S.Fang, L.Bi, X.Wu,

H.Gao, C.Chen, W.Liu: Journal of Power Sources, 2008, 183[1], 126-32