Electrostatic precipitator corona discharge

Back corona (back ionization) The discharge phenomenon that takes place from a particulate layer in an electrostatic precipitator. 

Corona The luminous discharge that appears at the surfaces of a conductor in an electrostatic precipitator due to air ionization. 

Monodispersed polystyrene latex particles 1.049 pm in diameter (std dev = 0.0587 pm) were captured utilizing a radial flow parallel-plate mobility analyzer (Tardos et. al. 1984). The mobility of the particles was determined from measurements of the collection efficiency of the analyzer by sampling particle number density for the inlet and exit flows (Figure 3-10). The principle was fundamentally that of electrostatic precipitation. The particles were charged by a corona discharge. The particles capture efficiency in the mobility... 

In electrostatic precipitators incorporating a corona discharge, the charge on a single quartz particle 115 /xm in diameter is increased to 0.2 10 elementary charges, or 0.32 10" C. In this case, the image force is about 4.6 dyn, i.e., far greater than the ordinary level of adhesive forces. 

Previous attempts have been made to develop reactions using electrical oxidation of gas pollutants. One of these was an electrochemical flow reactor (essentially an electrostatic precipitator with a catalyst) developed to oxidize a large volume of gas with hydrocarbon pollutants. However, the reactor apparently precipitated the hydrocarbons to the inner wall (outer electrode) of the reactor in the presence of corona discharge [22]. In the present study, no precipitates or dye deposits were observed in the reaction vessel after bleaching had taken place. 

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