Air contains 21% oxygen, 78% nitrogen, 0.9% argon and 0.1% other gases. AirSep Oxygen Generating Systems separate oxygen from compressed air through a unique Pressure Swing Absorption process. The PSA process uses molecular sieve (a synthetic zeolite), which attracts (absorbs) nitrogen from air at high pressure and releases (desorbs) it at a low pressure.
AirSep Oxygen Generators use two vessels filled with molecular sieve as absorbers. As compressed feed air flows through one of the vessels, the molecular sieve absorbs nitrogen. The remaining oxygen passes through the vessel and exits as the product gas.
Before the absorber becomes saturated with nitrogen, the feed air is diverted to the second vessel. At that point, the sieve in the first vessel regenerates by desorbing the nitrogen through depressurization and purging it with oxygen from the second vessel.
This process is then repeated in the second vessel to complete a cycle that allows the oxygen generator to deliver a constant flow of produce oxygen at 90% minimum purity. Under normal operating conditions, the molecular sieve is completely regenerative and will last indefinitely. To see how a PSA system operates please click here.
View our range of Oxygen Generators here.
Ozone is represented as O3, a triatomic module consisting of 3 oxygen atoms. It is a powerful oxidising agent, far stronger than ordinary diatomic oxygen, represented as O2.
In the UV process air is passed over a special lamp emitting light in the wavelength 185nm. This wavelength is part of the spectrum known as UVC and is dangerous to unprotected eyes and skin. It produces an effect similar to sunburn which on the eyes can be very painful.
When air is exposed to this light some molecules of oxygen are split into individual atoms and recombine with existing oxygen molecules (O2) to form ozone (O3).
A similar process occurs when air or oxygen is passed through a small space between plates which have a very high voltage applied to them. One of the plates would have the high voltage and the other would be connected to earth. The high voltage generates a corona which would be visible as a blue/purple light. Oxygen passing through this corona causes some of the molecules to be split into individual oxygen atoms which then recombine with existing oxygen molecules to form ozone (O3).
Ozone (O3) is short lived lasting for only 15-20 minutes but in that time it will combine with organic and some inorganic compounds to form a different compound. The combination of oxygen with another compound is known as oxidation. If the organic compound is in the form of a pathogen then the pathogen will be destroyed.
Ozone is measured in an environment in ppm (parts per million) or ppb (parts per billion). When dissolved in water it is measured in mg/litre or ppm.
When reviewing the overall output of an ozone generator the measurement is in gm/hr or mg/hr. To look at the efficiency or concentration output of an ozone generator you could look at gm/m3, ppm or percent weight in air or oxygen (10% is a high reading). The concentration alone is not a measurement of total output without knowing the volume of the output, i.e. a generator output stated in ppm would be meaningless without stating the amount of gas produced at this concentration.
Reducing the temperature, increasing the concentration of oxygen in the feed gas and reducing the moisture content will increase the output of ozone from a CD ozone generator. Our ozone generators are rated at an ozone output that they produce in a normal service configuration. We do not make unrealistic claims of high outputs that are only achievable under extraordinary conditions.
There are discussions of various ozone generators producing nitric acid as a by-product. This can occur when nitrogen and moisture are both present in the high voltage corona discharge area. This would really only occur if the feed was ambient air. The amount of acid produced is small but if the use is in food processing for instance then it would be important to ensure a suitable trap is placed in the line. Our ozone generator components are made from quartz and 316 grade stainless steel and will not be affected by acid. UV ozone generators do not suffer from this problem.
View our range of Ozone Generators here.