Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7746187 | Solid State Ionics | 2014 | 4 Pages |
Abstract
Long-term isothermal experiments of soot combustion were performed on Yttria-stabilized Zirconia, an oxygen ionic conductor, at 370, 390 and 410 °C. At these temperatures, isotopic experiment confirms that mobile YSZ bulk oxygens oxidize soot at the soot/YSZ interface. In parallel, the surface oxygen exchange process replenishes YSZ oxygen atoms. After long-term isothermal experiments, HR-TEM observations reveal that the remaining soot particles form a continuous thin film on some YSZ grains, which inhibits the oxygen potential gradient, then stopping the oxidation process. All these experiments are in good agreement with the proposed fuel-cell type mechanism of soot on YSZ.
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Authors
E. Obeid, M.N. Tsampas, S. Jonet, A. Boréave, L. Burel, M.C. Steil, G. Blanchard, K. Pajot, P. Vernoux,