Fuel-Cell type Oxidation of Soot on YSZ

P. VERNOUX; E. OBEID; L. LIZARRAGA; M.N. TSAMPAS; A. BOREAVE; M.C. STEIL; G. BLANCHARD; K. PAJOT

Kyoto

Conferencia; The 19th International Conference on Solid State Ionics; 2013

The International Society for Solid State Ionics (ISSI) and The Solid State Ionics Society of Japan (SSIJ)

The automotive pollution control is an urgent need, especially due to future, ever more stringent, legislations. Since 2011, all new Diesel cars, sold in the European Community, are equipped with a Diesel Particulate Filter (DPF) to drastically remove soot particulates. DPFs consist of porous wall-flow monolithic structures which are composed of many parallel alternately plugged channels with porous walls. Particulate Matter(PM) in the Diesel exhaust is filtered by the porous walls which separate adjacent channels. DPFs must be periodically regenerated. This is accomplished by burning the trapped soot particles off. Different technologies were developed; most of them are using a catalyst to promote the oxidation of PM. This study reports the ability of a purely ionically conducting ceramic, Yttria- Stabilized Zirconia (YSZ), to oxidize soot particles. The catalytic mechanism was investigated by using 18O2. In addition to YSZ powder, porous YSZ membranes were developed to simulate DPF porous walls and were tested in quasi real conditions.