Abstract: Disclosed is a nonthermal plasma-based exhaust gas particulate matter reduction apparatus for preventing an arcing phenomenon, the apparatus comprising: a chamber which is a tubular body having exhaust gas flowing therein and is connected to a ground power supply; a power supply device which is disposed outside the chamber and includes a voltage generation unit for generating a steady-state voltage at which maximum efficiency of a nonthermal plasma phenomenon is generated; an emitter which is disposed inside the chamber and generates nonthermal plasma between the chamber by having the steady-state voltage applied thereto; a rod which applies the steady-state voltage to the emitter by electrically connecting the voltage generation unit and the emitter; and an arcing prevention unit which prevents an arcing phenomenon from occurring between the rod and the chamber by providing insulation between the rod and the chamber.

Abstract: A disclosed system for reducing particulate matter in an exhaust gas includes: a first conductor provided in the form of a tubular body through which a gas stream flows, and to which a ground power supply is connected; a second conductor disposed within the first conductor and having an emitter which comes into contact with the gas stream and generates non-thermal plasma (NTP); and an insulator for electrically separating the second conductor from the first conductor, in which a predetermined level of direct current voltage is continuously applied to the second conductor.