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Regeneration of Diesel Particulate Filter (DPF) using Ozone
Jae-ou Chae(채재우),Xin-hong Chen(진신홍),C. Purushothama(푸루소타마),Rui-qiang Liu(류서강),Ming-wei Li(이명위) 대한기계학회 2006 대한기계학회 춘추학술대회 Vol.2006 No.6
Recent years, automotive diesel engine emission standards become very strict, and it is hard to fulfill them just by using the current techniques of improving combustion. Therefore, the ceramic diesel particulate filter (DPF) is widely used for collecting soot from the exhaust gas of diesel engine. However, the DPF need being regenerated after the soot accumulation. This research deals with regeneration of the DPF using ozone, which comes from surface discharge occurred in a dielectric barrier discharge reactor. Pure oxygen was introduced into the reactor, and was discharged to form much activated species, including ozone and monatomic oxygen. When pure oxygen of 4 L/min at a temperature of 443 K is passed to the DPF through plasma reactor which is energized by 100 W for two hours, it has found a decrease in weight of soot by 2 grams. Comparing with the regenerating method via NO₂, the method using ozone is much friendlier to the environment, because ozone is very unstable.