Combined kinetic charging of particles on the precipitating electrode in a corona field

Abstract

In this paper, we give the results of the theoretical study concerning the combined kinetic charging of the particles on the precipitating electrode in a corona field by taking into account contact charging. We derive some mathematical equations that allow us to determine the limit charge values on the particles and the charging kinetics of the particles. It has been demonstrated that the limit charge value on the particle can be less than the value calculated using the Pauthenier theory. In the case when the time constant ratio of contact and field charging mechanisms is equal to the ratio of the maximum charges of these charging mechanisms, we find that the sign of the limit charge on the particle has changed.

Effect of Dielectric Barrier Discharge on the Sorption Properties of Disperse Porous Materials in CO2−Silicagel and SF6−Silicagel Systems

“…However, the concentration of charged particles in the discharge channel will rapidly increase by the DBD acting on the adsorbent. 21,22 In this case, it must be assumed to be the distance between the ion and its image into account, instead of the distance R 12 . As seen in eq 7, the adsorption energy is a function of the distance between the adsorbent surface and the atoms of the molecules to be adsorbed.…”

“…Even if the concentration of charged particles is less than the concentration of neutral particles, this assumption is still valid. However, the concentration of charged particles in the discharge channel will rapidly increase by the DBD acting on the adsorbent. , In this case, it must be assumed to be the distance between the ion and its image into account, instead of the distance R 12 . As seen in eq 7, the adsorption energy is a function of the distance between the adsorbent surface and the atoms of the molecules to be adsorbed. , Therefore, to analyze the formation of ion−molecular complexes on the adsorbent surface, the probable distance between the ion approaching to the adsorbent surface from discharge channel and the image of the ion must be determined.…”

Calculation of electrical field of spherical and cylindrical gas voids in dielectrics by taking surface conductivity into consideration

“…In this case, in order to determine the charge q(t) on the particle, first the surface charge density s is determined by using the formulas defined for V 1 and V 2 potential values in accordance with the shape of the void. Then, to find q(t), the obtained surface charge density is integrated over all surface of the particle (Alisoy et al, 2004a). Thus, q(t) expressions for semi-spherical or semi-cylindrical particle will be obtained as COMPEL 24,4 …”

“…In this case, in order to determine the charge q ( t ) on the particle, first the surface charge density σ is determined by using the formulas defined for V 1 and V 2 potential values in accordance with the shape of the void. Then, to find q ( t ), the obtained surface charge density is integrated over all surface of the particle (Alisoy et al , 2004a). Thus, q ( t ) expressions for semi‐spherical or semi‐cylindrical particle will be obtained as Equation 45 Equation 46 In order to show how the surface conductivity of the particle affects the contact charging, the variation of charging kinetic of the semi‐spherical particle for different values of γ s has been drawn in Figure 4 in accordance with the equation (24) for time constant τ 1 (similar graphic has been obtained for cylindrical gas void by using the equation (25) for time constant τ 3 ).…”

An analysis of corona field charging kinetics for polydisperse aerosol particles by considering concentration and mobility

“…In general, the most widely used methods for charging particles in EIT are the charging of particles in a volume charged electric field (field charging) and charging particles by high voltage electrode contact (contact charging). As is known, charging of particles in a volume consists of two processes: (i) directed movement of the ions onto the particle by the effect of an external electric field and (ii) diffusion of the ions onto the surface of the particle [5][6][7][8][9][10][11][12]. The degrees of intensity of these processes depend on the size of the particle.…”