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2 Polish Journal of Chemical Technology

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The influence of a high voltage electrode design on electrical parameters of the ozone generator

Jaroszyńska-Wolińska J., Wroński M.

Polish Journal of Chemical Technology

2002

Vol. 4, nr 2

8-11

The application of high-voltage electrode of an altered design to cylindrical ozonizer creates new potential for obtaining higher efficiency of an ozone formation process. It has been found that the new design of an inner high-voltage electrode brings a change to the discharge character and influences the rate of an ozone synthesis process. The shape of Lissajou's curves obtained, indicates the mixed character of the discharges in an ozonizer with a new design at helix electrodes. This type of electrodes had a various number of windings per unit length and per diameters. Experiments have been performed within the range of voltage values of 4.0 - 8.5 kV, (50 Hz and 150 Hz), the discharge gap was 2 mm or 4.5 mm and within the range of inlet gas flow of 30 - 100 dcmYh. It have been shown that application of a high-voltage electrode with a mean number of windings per unit length and oxygen as inlet gas yields the highest ozone concentration at the same value of specific energy.

Ozone synthesis-mechanism and technology

Ozonek J., Wroński M., Polio I.

Polish Journal of Chemical Technology

2000

Vol. 2, nr 1

19-24

An operational principle of discharge elements applied in ozonizers- chemical plasma reactors for silent discharge generation has been discussed. An analysis of phenomena occurring in ozone synthesis reactors has been presented and on that basis requirements to be met in order to obtain the highest efficiency of an ozone synthesis process have been formulated. The principal quantitative factors that characterize an ozone generation process are the following: energy consumption, concentration of the obtained ozone, and material efficiency of the process. The effect of the applied dielectric material, reaction zone volume, and the design of electrodes on the process efficiency has been experimentally tested. Along with the testing, an analysis of the ozone synthesis kinetics in the conditions that resemble the operation of an industrial installation has been done. The course of the synthesis of nitrogen oxides in an ozonizer fed with air and in the conditions of a big power load has also been analyzed. Dependences of the concentration of individual nitrogen oxides on the specific energy in a discharge zone have been obtained. From among a number of factors responsible for high energy consumption during the ozone synthesis process it is an irreversible change of part of electrical energy into heat and an unproductive heating up of a substrate gas in a discharge gap that are the most important ones. The following factors can have advantageous effect on the reduction of energy losses: a discharge gap of a smaller size, an adequate type of the applied electrode, and the kind of gas introduced to the reactor (air or oxygen).