Corona reactor

Corona discharge is the simplest type of plasma generator. A feature of the corona discharge, which differentiates it from the other discharges, is that no dielectric is involved. Instead, an electron avalanche is initiated from a sharp metallic surface where the radius of curvature is small. The electric field has to be pulsed in order to prevent the plasma from going into the thermal mode and forming an arc. The electric field in corona reactors is about 50 kV/cm. 

Huang, L. and Matsuda, H. (2004) Removal of NO by a pulsed-corona reactor combined with in situ absorption, AIChE J. 50, 2676-81. 

These types of corona reactors involve simultaneous application of non-thermal plasma above liquid surface and direct high voltage electrical discharge in liquid phase. That is achieved by the combination of different electrode... 

Figure 5. Configuration of hybrid corona reactors (A) series and (B) parallel.

T0084 Battelle Pacific Northwest Laboratory, Gas-Phase Corona Reactor... 

T0070 ARS Technologies, Inc., Pneumatic Fracturing Extraction T0084 Battelle Pacific Northwest Laboratory, Gas-Phase Corona Reactor T0087 Battelle Pacific Northwest National Laboratory, Liquid Corona... 

Battelle Pacific Northwest Laboratories Gas-Phase Corona Reactor Abstract... 

The gas-phase corona reactor (GPCR) uses high-voltage alternating-current fields to create a nonequilibrium plasma that destroys volatile organic compounds (VOCs) in off-gas products. 

TABLE 1 Summary of Estimated Costs in Dollars/Ton (0.90718 metric ton) for Various Feed Rates and Influent Concentrations for Gas-Phase Corona Reactor Treatment of Volatile Organic Compounds... 

Figure 20 Schematic of two configurations for a pulsed corona reactor (a) ground electrode submerged in liquid and (b) ground electrode suspended above the liquid surface. The immersed electrode in both cases is a point electrode (reprinted with permission from Grymonpre et al, 2004 Copyright 2004 American Chemical Society). For a variety of other reactor configurations, see Locke et al. (2006).

Figure 14-5. Schematic representation of Figure 14-4. Schematic representation of corona reactor with a rotating drum on corona reactor. which the substrate is placed.

The relatively low yield and the complexity of the reaction products does not allow an unequivocal designation of reaction mechanism or of the mode of energy transfer in the corona environment. However, where possible, we have proposed reaction mechanisms which are consistent with our results to date. These mechanisms are summarized in Figure 6. Studies are underway to obtain deuterium exchange data in the corona reactor, and mass spectral data are being evaluated. Investigation of the utility of corona chemistry will be extended to other volatile compounds. 

Since the power which can be dissipated in a corona reactor or cell is a function of the supply frequency, we have settled arbitrarily on the... 

The ratings for the basic electrical components are dependent upon the characteristics of the corona reactor and the impedance load which it represents to the power supply. Corona reactor values which affect these ratings are ... 

The corona reactor represents a capacitive load on the major items of the power supply equipment, up to the time of corona initiation. Since this generally results in a poor power factor, there are two possible means of solution ... 

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