Oxidation of Soot Trapped by Diesel Particulate Membrane Filter Made of SiC Nanoparticles

Abstract

The apparent activation energy of soot oxidation on a diesel particulate membrane filter (DPMF) was lower than on conventional DPF’s. The membrane layer of the DPMF, consisting of SiC nanoparticles. was covered by a silicon-oxycarbide layer containing single-nanosized Pt particles. In this study, the carbon black (CB) oxidation temperature with varying contact area between SiC nanoparticle and CB was evaluated. The CB oxidation temperature was observed to depend on the amount of oxygen adsorbed on the surface of the silicon-oxy-carbide layer. Moreover, CB was oxidized by adsorbed oxygen on the surface of the SiC nanoparticle. Pt increased oxygen adsorption.