PEM Low-Pressure Electrolytic Ozone
Technical Overview
High-voltage corona method: This process uses air as its raw material, maintaining a specific discharge gap between two parallel high-voltage electrodes separated by a dielectric material. When high voltage is applied across the electrodes, the resulting heat excites oxygen molecules in the air, enabling them to absorb energy and collide with each other, ultimately forming ozone. While the corona method produces ozone using an air source—where nitrogen constitutes over 78% of the air—under high-voltage conditions, nitrogen reacts with oxygen to create a new compound: nitrogen dioxide, an internationally recognized toxic substance and one of the known contributors to cancer development. Additionally, the technical limitations of the high-voltage corona method restrict the ability to produce highly concentrated ozone; typically, the ozone concentration achieved under normal operating conditions ranges from 1% to 3% by weight.
Low-pressure electrolysis: This process uses water as the raw material and a solid-state noble-metal polymer as the electrolyte. By applying low-pressure electrolysis to water (H₂O), oxygen is separated to produce ozone, achieving an ozone concentration by weight of up to 18–20%. The resulting ozone gas is accompanied solely by oxygen—free of any harmful byproducts.
The emergence of third-generation ozone technology—PEM low-pressure electrolysis ozone generation—has significantly expanded the applications of ozone. This innovative method overcomes the limitations of traditional high-voltage corona discharge, featuring a non-consumable core electrode that drastically reduces operating costs. Moreover, it produces ozone at concentrations more than six times higher than those achieved by conventional high-voltage corona systems. Notably, this process generates ozone without releasing harmful substances like nitrogen oxides, ensuring zero secondary pollution in the process. As a result, it truly embodies a low-carbon, eco-friendly, and energy-efficient product. Consequently, its application scope is even broader, making it an inevitable trend in the evolution of ozone production technology.
Performance and Features of Low-Pressure Electrolytic Ozone Equipment
1. The resulting ozone concentration, by weight, is several times higher than that produced by the high-voltage corona method (reaching up to 20%). At low pressure, the minimum concentration is 18%, while at high pressure, it peaks at 3%. Notably, the low-pressure concentration is at least six times greater than the high-pressure level.
2. The ozone gas produced contains no nitrogen oxides (nitric oxide, nitrogen dioxide) and is free of carcinogenic substances.
3. Utilizes low-voltage electrolysis technology (3–5V), eliminating any risk of electrical hazards. It produces no electromagnetic waves or noise, ensuring seamless coexistence with other precision instruments without causing interference.
4. The ozone generator uses pure water as its gas source, eliminating the need for an oxygen supply or any additional equipment external to the high-pressure ozone unit during operation—making it easy to use, safe, and highly reliable. Additionally, because low pressure eliminates the requirement for air pre-treatment or cooling, no auxiliary devices are needed at all.
5. Low electrode wear, enabling continuous operation with an exceptionally long service life.
6. Operates reliably regardless of the working environment or temperature, with humidity resistance up to 90%. Particularly suitable for water production facilities in damp environments.
7. Pure water circulates for self-cooling, eliminating the risk of overheating caused by continuous equipment operation.
8. Due to the high ozone concentration produced, introducing an equivalent amount of ozone into water using this method can achieve significantly higher ozone levels in the water.
9.20% high-concentration ozone is used for air disinfection and sterilization. 80% oxygen is utilized to enhance indoor environmental quality and increase the oxygen content of the air.
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