Abstract
Catalytic aflertreatment technology for exhaust gas emitted from fossil fuel combustor or combustion engines is now approaching to a practical limit because the temperature of exhaust gases decreases with increase in the fuel combustion efficiency. Further, the prices of rare or precious metals are significantly increasing. Therefore,nonthermal plasma aftertreatment becomes more important in a near future. In this paper, our recent experimental achievements on plasma emission control for diesel engines and combustor is reviewed