Effect of PH 3 on Stability of LST Ceramic Anode in Coal Syngas

Stability of La substituted SrTiO 3 anode in coal syngas fuel was investigated. La 0.25 Sr 0.75 TiO 3 and (La 0.25 Sr 0.75 ) 0.9 TiO 3 pellets were annealed in simulated coal syngas with 1 ppm PH 3 atmosphere at 900 o C for 100 hrs. Sr 3 (PO 4 ) 2 and TiO 2 were observed on the surface of each sampl...

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Published in:ECS transactions 2013-10, 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 SrTiO 3 anode in coal syngas fuel was investigated. La 0.25 Sr 0.75 TiO 3 and (La 0.25 Sr 0.75 ) 0.9 TiO 3 pellets were annealed in simulated coal syngas with 1 ppm PH 3 atmosphere at 900 o C for 100 hrs. Sr 3 (PO 4 ) 2 and TiO 2 were observed on the surface of each sample after the exposure test. XRD and SEM/EDS results indicate that most Sr 3 (PO 4 ) 2 was formed on the surface of stoichiometric LST. Chemical stability of LST for PH 3 was effectively improved by changing the A-site deficient composition.
ISSN:1938-5862
1938-6737
DOI:10.1149/05701.1577ecst