Description of a Corona Discharge Ozone Generator and Its Process

Corona Discharge Ozone Generator

The term corona comes from the electric field that is diffused from dielectric material. Corona discharge ozone generators are mostly used in industrial uses. Corona discharge ozone generators can create high quantities of ozone and can create a purer form of ozone.  This allows a decrease in irritating gasses or harmful gases.


Corona discharge or CD ozone systems involve varied technologies but operate relatively the same. Dry oxygen-containing gas passes through an electromagnetic field. An electromagnetic field is used to split up the oxygen molecules. This allows molecules to attach to other oxygen molecules. The ozone is then attracted to their contaminate that is trying to be eliminated. Currents can be divided into three different types. These are low frequency (50- 100 Hz), medium frequency (100- 1,000 Hz) and high frequency (1,00 and up Hz). Due to the use of electrical energy and the heat of the corona discharge, cooling via water or air must be used.

Another critical part to using a corona discharge ozone generator is the air being fed into the machine. Proper air preparation is a must. The gas must be very dry ( -80F°). This is because anything with more moisture in it can affect the ozone production. This leads the ozone to be more acidic. Nitric acid can form inside the machine; it is very corrosive. Once a part of the machine is corroded is will increase the amount of maintenance, time to produce ozone, and money.