Can it Produce Ozone?

Yes- providing there is free oxygen in the surrounding atmosphere.

But why so many paper just mention that the method of producing ozone is corona discharge instead of spark discharge? Can spark discharge produce it? Thank you.

Yes. Corona discharge, UV light and electrical discharge are the most common methods of generating Ozone, O₃. If you are near a very large electrical spark, such as an arcing power distribution transformer or a downed high voltage transmission wire you can smell the pungent odor of Ozone. Fire fighters in suburban and rural area often smell it when a power line is down and arcing. They are there to prevent other things from catching fire, NOT TO STOP THE ARCING.

Corona Discharge

http://www.lenntech.com/library/ozone/generation/ozone-generation.htm

Electrical Discharge

http://en.wikipedia.org/wiki/Ozone

Good Luck, Old Salt

But if the voltage is about 15kV, and the frequency is about 1Hz, can this condition produce the ozone? Our device is a Kelven Water Dropper.Thank you.

This WILL produce ozone. The high electrical potential across a significant gap will definitely produce ozone, just the same as lightning does. Quantities produced and efficiencies are a different question.

In answer to your post #2, probably because corona discharge is primarily used as one of the most PRACTICAL ways of generating ozone when required, which spark discharge is not. Therefore it would be logical that available research is predominantly about corona discharge.

Thank you.

Ozone can be generated by AC and DC spark discharges, Corona discharge, lightning strikes and several other methods. Corona discharge is recently the most frequent method of ozone generation due to economic reasons. As long as the arcing is maintained there will be ozone from an electrical spark discharge. The major factors are the surface area, distance between electrodes, shape of the electrodes, the voltage and the available current.

The French were the first to use ozone generated from sparks for water purification and sewage purification, as early as the 1950's. Corona discharge was not used until approx. 1980, for these purposes.

There used to be an classic experiment with the generation of ozone for "advanced inorganic chem labs". Using all glass units zinc chloride solution is placed in the center tube of a lab condenser and an wire placed in it. Aluminum foil is then wrapped around the outside (jacket) of the condenser. A neon sign or oil burner transformer secondary is then connected between the zinc chloride and the aluminum foil. Air or oxygen is then passed through the cooling jacket of the condenser and power applied to the primary of the transformer. This causes some sparking within the jacket which generates ozone. IF DOING THIS EXPERIMENT USE ALL NECESSARY SAFETY PRECAUTIONS! This is the method, not the same apparatus, the French used for ozone production in water and sewage treatment.

Good Luck, Old Salt

Thanks a lot.

Ozone can be created with out the spark discharge just the potential between two plates. The process is use for industrial odor control. So if the potential is there to produce a spark then it has the potential to produce ozone.