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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.

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Abstract
1. INTRODUCTION
2. EXPERIMENTAL
3. RESULTS AND DISCUSSION
4. CONCLUSIONS
REFERENCES

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UCI(KEPA) : I410-ECN-0101-2009-550-016798856