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Effect of PH3 on Stability of LST Ceramic Anode in Coal Syngas

Stability of La substituted SrTiO3 anode in coal syngas fuel was investigated. La0.25Sr0.75TiO3 and (La0.25Sr0.75)0.9TiO3 pellets were annealed in simulated coal syngas with 1 ppm PH3 atmosphere at 900 oC for 100 hrs. Sr3(PO4)2 and TiO2 were observed on the surface of each sample after the exposure...

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Bibliographic Details
Published in:ECS transactions 2013-01, Vol.57 (1), p.1577-1583
Main Authors: Chen, Gang, Kishimoto, Haruo, Yamaji, Katsuhiko, Kuramoto, Koji, Gong, Mingyang, Liu, Xingbo, Hackett, Gregory, Gerdes, Kirk, Horita, Teruhisa
Format: Article
Language:English
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Summary:Stability of La substituted SrTiO3 anode in coal syngas fuel was investigated. La0.25Sr0.75TiO3 and (La0.25Sr0.75)0.9TiO3 pellets were annealed in simulated coal syngas with 1 ppm PH3 atmosphere at 900 oC for 100 hrs. Sr3(PO4)2 and TiO2 were observed on the surface of each sample after the exposure test. XRD and SEM/EDS results indicate that most Sr3(PO4)2 was formed on the surface of stoichiometric LST. Chemical stability of LST for PH3 was effectively improved by changing the A-site deficient composition.
ISSN:1938-5862
1938-6737
DOI:10.1149/05701.1577ecst