Non Thermal Plasma Aftertreatment of Particulates - Theoretical Limits and Impact on Reactor Design

Uneven Dielectric Barrier Discharge Reactors for Diesel Particulate Matter Removal

“…used a non-thermal plasma (NTP) reactor in which ceramic balls are packed between two electrodes to treat PM and NO x in exhaust gases from a Nissan 2.7 l IDI diesel engine [7]. They found that the NTP reactor has effects on the oxidation of PM in diesel exhausts at a low temperature; PM can be removed at an energy efficiency of 2.9 g/kWh.…”

“…Typical after treatment methods for removing PM include using diesel particulate filter (DPF) or catalyst-based DPF (CB-DPF) [2][3][4] and nonthermal plasmas [5][6][7][8]. The first attempt for the reduction of the visible and thus disturbing black smoke by the use of particulate traps were taken early in the 60s.…”

Influence of Polarity and Rise Time of Pulse Voltage Waveforms on Diesel Particulate Matter Removal Using an Uneven Dielectric Barrier Discharge Reactor

“…They reported that the soot emitted from a 2 l diesel engine (1,200 rpm, 111 Nm) can be completely eliminated when the peak voltage is above 7 kV [16]. In 2000, Thomas et al used a non-thermal plasma (NTP) reactor in which ceramic balls are packed between two electrodes to treat PM and NO x from a Nissan 2.7 l IDI diesel engine [17]. They have demonstrated that PM can be removed by plasma discharges within the NTP reactor.…”

“…Extensive literature has provided information on the mechanism of PM oxidative removal, simulation of PM oxidation, and experiments using real exhaust gases [8][9][10][11][12][13][14][15][16][17][18][19][20][21]. Related with the mechanism of PM oxidative removal, the oxidation mechanism of carbon materials (such as graphite and carbon nanotube) are helpful as the main component of PM is graphite-like carbon of graphene basic structural element.…”

Experimental investigation of catalytic soot oxidation and pressure drop characteristics in wall-flow diesel particulate filters

“…The system, shown in Figure 1.16, utilizes a bed of ceramic pellets placed between two cylindrical electrodes. Perforation and a system of channels in the inner electrode direct the exhaust gas flow through the pellet bed [56]. It was found that the chemistry in the case of the single-stage plasma PM-reducing device appears to be quite different.…”