PPPS-2013: Analysis of influences of dielectric and electrical properties on particle charging

Summary form only given. Particles with dimension less than 2.5μm (PM2.5) pose a notable health risk. Potentially, airborne PM2.5 particles can penetrate deep into the human respiratory system. Electrostatic precipitation of fine and ultra-fine particulate matter, including an impulsive micro-electrostatic precipitation technology [1], is proven to be an efficient method for air cleaning in industrial and domestic environments. One of the factors which impacts on the efficiency of precipitation is the electric charge accumulated by particles in non-thermal corona plasma discharges.Recent studies [2] show that the rate of charging depends on the dielectric and electrical properties of both the particles to be removed and the external medium. This paper presents an investigation of the influence of the dielectric and electrical properties (conductivity and permittivity) on the charging process associated with particles in the space charge developed by non-thermal plasma. Precipitation efficiency as a function of the dielectric and electrical properties of airborne particles and external mediums is discussed in this paper.