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A regeneration of DPF with collected PM was investigated using the low temperature atmospheric pressure nonthermal plasma. The method is to use the NO2 and radicals induced by the plasma reactor to burn carbon soots deposited on DPF. First, the performances on the conversion of NO to NO2 of the three types of DPF plasma reactors were evaluated on various conditions. Next, a regeneration experiment was carried out using a barrier type pulsed corona plasma reactor. As a result, the regeneration of DPF using the plasma was confirmed when the gas temperature was 250°C.

A direct incineration or regeneration of DPF with collected PM was investigated using atmospheric pressure nonthermal plasma which was induced inside DPF. The method is to use the NO2 and radicals induced by the plasma to burn carbon soots deposited on DPF. Conversion of NO to NO2 was evaluated using three types of DPF honeycomb plasma reactors. Then, the regeneration experiment was carried out using a DPF honeycomb plasma reactor. As a result, it was confirmed that the pressure drop decreased when the plasma was turned on and the regeneration of DPF was confirmed at the low temperature of 200°C.