Production of Plasma-Activated Water Using a Closed-Loop System Without Exhaust Gas Emission

Authors:
Publisher website
Google Scholar
Abstract
Plasma-activated water (PAW) is a subfield of plasma nitrogen fixation, and various plasma sources have been explored for its production. Active research is underway for its application in agriculture and biotechnology. In this study, we demonstrated the feasibility of an eco-friendly, NO x emission-free PAW production system by developing a closed-loop system that recycles unreacted gases generated during PAW production. The system was designed to allow natural inflow of gas from the outside in proportion to the volume of gas dissolved into the water, thereby maintaining equilibrium between the internal pressure and atmospheric pressure. A comparative experiment was conducted on the nitrogen-to-oxygen mixing ratio between the internal gas and the inflowing gas. It was confirmed that the system operated most stably at a nitrogen-to-oxygen ratio of 1:2. Although a higher oxygen ratio increased power consumption and could enhance the PAW production capacity, it was observed that when the oxygen ratio exceeded 50%, the nitrate production efficiency plateaued at approximately 55 g/kWh. These findings suggest that the amount of gas drawn into the closed-loop PAW production system can serve as a real-time indicator of the system’s performance.
Funding Information
  • Samsung

This publication has 52 references indexed in Scilit: