Characteristics of PM formed by quenching of toluene pool flame using metal mesh

Abstract

Nanometer size Particulate Matter (PM) exhausted from internal combustion engine is one of the major air pollutants, and its reduction technologies are required. In this study, to clarify characteristics of PM formed by flame quenching process, a laminar pool flame of toluene was quenched using a slide and rotary metal mesh system, and PM exhausted by quenching process was analyzed. Activation energy of PM at various quenching position in the flame were measured by a thermo gravimetric analyzer. As a result, it was found that oxidative properties were differed depending on quenching position. Initial oxidation temperature of soot contained in PM raised with an increasing of quenching position. In addition, by quenching the flame using a metal mesh, PM with a low activation energy of oxidation was exhausted.