Isothermal catalytic oxidation of diesel soot on Yttria-stabilized Zirconia

被引：14
作者：
Obeid, E. [1 ]
Tsampas, M. N. [1 ]
Jonet, S. [1 ]
Boreave, A. [1 ]
Burel, L. [1 ]
Steil, M. C. [2 ]
Blanchard, G. [3 ]
Pajot, K. [3 ]
Vernoux, P. [1 ]
机构：
[1] Univ Lyon 1, CNRS, Inst Rech Catalyse & Environm Lyon, UMR 5256, F-69626 Villeurbanne, France
[2] CNRS Grenoble INP UJF, UMR 5279, Lab Electrochim & Physicochim Mat & Interfaces, F-38402 St Martin Dheres, France
[3] PSA PEUGEOT CITROEN, Ctr Tech Velizy, F-78943 Velizy Villacoublay, France
来源：
SOLID STATE IONICS | 2014年 / 262卷
关键词：
Yttria-stabilized Zirconia; Soot combustion; Fuel-cell type mechanism; Diesel particulate filters; Surface oxygen exchange; EXPERIMENTAL MICROKINETIC APPROACH; CERIA/SOOT CONTACTS; LA3+-DOPED CEO2; COMBUSTION; MECHANISM; ABATEMENT; IMPACT; OXYGEN; O-2; NOX;
D O I：
10.1016/j.ssi.2013.12.015
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Long-term isothermal experiments of soot combustion were performed on Yttria-stabilized Zirconia, an oxygen ionic conductor, at 370,390 and 410 degrees 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. (C) 2013 Elsevier B.V. All rights reserved.
引用
收藏
页码：253 / 256
页数：4
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