Chemical stability and hydrogen permeation performance of Ni–BaZr0.1Ce0.7Y0.2O3−δ in an H2S-containing atmosphere
2008; Elsevier BV; Volume: 183; Issue: 1 Linguagem: Inglês
10.1016/j.jpowsour.2008.05.015
ISSN1873-2755
AutoresShumin Fang, Lei Bi, Xiusheng Wu, Haiying Gao, Chusheng Chen, Wei Liu,
Tópico(s)Magnetic and transport properties of perovskites and related materials
ResumoComposite membranes based on Ni and Zr-doped BaCeO3 are promising for hydrogen separation. Such composites show high proton conductivity and adequate chemical stability in H2O and CO2, but may be unstable in H2S. In this work, the hydrogen permeation performance of Ni–BaZr0.1Ce0.7Y0.2O3−δ was measured in an H2S-containing atmosphere at 900 °C. The hydrogen permeation flux began to degrade in 60 ppm H2S and decreased by about 45% in 300 ppm 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 suggest that reaction between H2S and doped BaCeO3 caused the performance loss of the Ni–BaZr0.1Ce0.7Y0.2O3−δ.
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