Diesel particulate matter and NO_x removals using a pulsed corona surface discharge

Abstract

A pulsed corona surface discharge (PCSD) system was established for particulate matter (PM)

Uneven Dielectric Barrier Discharge Reactors for Diesel Particulate Matter Removal

“…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. Also in 2000, we reported that carbon (activated carbon) oxidation using a pulsed spark discharge has an energy efficiency as high as 4-10 g/kWh, which implied that PM removal using such a plasma discharge has potential for practical use as an after treatment method for diesel exhausts [12].…”

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

“…The experimental apparatus consists of a diesel engine (Toyota, 2 liter, 4-cycle, direct injection) and a hydro dynamometer test cell equipped with a performance measurement system, which was described in detail elsewhere [18,19]. The diesel engine was operated at an output of 3.0 kW and the flow rate of exhaust gas was 76 Nm 3 /h.…”

“…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.…”

“…Yao et al found that undiluted PM emitted from a 2 l diesel engine can be removed using a DBD reactor which is driven by a pulsed corona surface discharge (PCSD). The energy efficiency of PM removal (the weight of removed PM per injected energy) reached a level of 3.6 g-PM/kWh with 42% PM removal [18,19]. Recently, we developed an uneven DBD reactor where corona discharges take place uniformly in each gap between uneven alumina plates and uneven electrodes for the removal of PM from the exhaust gas of a 2 l diesel engine [20,21].…”

Control of Diesel Gaseous and Particulate Emissions with a Tube-Type Wet Electrostatic Precipitator

“…to form molecular nitrogen (N 2 ), NO 2 , nitrous acid (HNO 2 ) or nitric acid (HNO 3 ). 20,21 Previous studies have also showed that a corona discharge in air may lead to a production of NO x at 3.6 ϫ 10 14 molecules/J of energy input. 25 Ozone (O 3 ) is a byproduct of the nonthermal plasma reactor and its generation rate is governed by the amounts of atomic oxygen (O) principally generated by the reaction of excited nitrogen and oxygen molecules (N 2 * and O 2 *) with the molecular oxygen (O 2 ).…”