Simultaneous Removal of NOx, SOx, and Soot in Diesel Engine Exhaust by Plasma/Oil Dynamics Means

The soot included in the exhaust gas from a diesel-engine vehicle (Nissan LD20, 2 liters) has been eliminated completely (100 %) independent of the load and cruising speed by a noveltechnique using a combination of discharge plasma and oil dynamics. As far as we know, this is the first success in suppressing the black exhaust gas. The NO_x (NO₂ + NO) and SO_x components have also been reduced about 70 % at a lotation number of 1200 rpm and a load of 7kg-m (the maximum torque at 1200 rpm is about 11.4 kg m), corresponding to 60 % of full load. This simultaneous treatment has become possible by using oil. The SO_x elimination is the first report in our investigation. Thus, the worst three air pollutants, soot, SO_x and NO_x, are removed simultaneously.