Experimental Research For Ozone Generation Using High Frequency Dielectric Barrier Discharge

Dielectric Barrier Discharge is the mostly commercially used method for producing ozone, but the efficiency is still needed to promote. The first method is to enhance the frequency of driving voltage. In this paper, the influence of the gap width and work condition on ozone generation is studied. It mainly concludes these contents as follows:1st. The influence of voltage and flow rate on ozone production for different feed gases is studied. The results show that ozone concentration initially increases with increasing volume flow rate, reaches a maximum and then starts to decrease with further increase in flow rate in air, while it keeps decreasing in oxygen. Ozone concentration decreases when oxygen humidity increases. Ozone concentration reaches to 55 000 ppm when voltage is 3 064 V and volume flow rate is 30 L/h in oxygen.2nd. The influence of gap width on ozone generation and efficiency is studied. The results show that both ozone concentration and efficiency increases from zero to the highest level and then decreased as the voltage or output power of source increases. And they decreases with increasing gap width for fixed output power. As the gap becomes bigger, the voltage when ozone starts to be generated increases, and the voltage at which the maximum concentration reaches increases too. The highest yield and efficiency can't be reached at the same time for the same reactor. The highest efficiency reaches at a lower output power, while the highest yield reaches at a higher output power.3rd. The influence of Ar on ozone production is studied, at different Ar/O₂. The results are different from that in O₂. When the whole flow rate is 300 L/h and Ar/O₂ varies from 200/100 to 240/60, the efficiency decreases with increasing voltage or output power, and the highest efficiency reaches at low voltage and output power when Ar/O₂=200/100. The voltage starting producing ozone and the highest ozone concentration increases when Ar/O₂ decreases.4th. Numerical simulation of electric field in the reactor is carried out by finite element method. The result presents theoretical basis of the technology.