Soot Incineration of Diesel Particulate Filter Using Honeycomb Nonthermal Plasma

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.