DBD technology

3rd Chemistry World Conference

Presentration on the MediPlas® system: More than a simple ozone generator

From June 14-15, 2023, the 3rd Chemistry World Conference will be held in virtual format. The theme is “Modifying Chemistry with the Novelties that Accomplish Future Goals.” Special emphasis will be placed on the significant contribution of chemistry to the progress of humanity and to solving fundamental problems of today’s society. The prestigious group of participants includes business leaders, scientists, researchers, chemists, chemical engineers and academic experts.

Dr. Stefan Nettesheim, Managing Director of relyon plasma, will give a presentation on the MediPlas® system on the first day of the event. This will emphasize that the system is more than just a simple ozone generator.

Abstract to the presentation

With the help of the abstract, you can get an idea in advance of what content you can expect during the presentation:

Dielectric barrier discharge flow reactors are among the most efficient technologies for producing oxygen-based ozone. When ambient air is used, the chemistry becomes much more complex and involves many competing reaction pathways, resulting in a mixture of ozone with nitrogen oxide components, nitric acids and peroxides. The process parameters that determine to some degree the composition of the result are: Composition and humidity of the incoming gas, power density of the dielectric barrier discharge, amplitude of the electrical excitation, and process temperature.

We have developed a reactor for typical flow rates of 0-10 slm with integrated active Peltier cooling that provides high control over the process temperature. The custom driver circuit can adjust the power density (via PWM) and the amplitude of the excitation voltage. The driver also includes a feedback signal proportional to the discharge intensity. A well-defined output including very high ozone concentrations of more than 30,000 ppm can be achieved with very high stability.

However, for some sterilization and medical applications, we have shown that the sweet spot for germicide is not necessarily the operating point of highest ozone concentration, but that the nitric oxide species in combination with moisture and peroxides play a crucial role. The components described in this paper can be easily integrated into a wide variety of systems and can be specifically controlled to optimize the desired effects.

More information about the Chemistry World Conference can be found here.

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