Nonthermal Plasma Regeneration of Diesel Particulate Filter

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.