Plasma / liquid (P/L) interfacial reaction for gas reduction reaction

The gas reduction reaction is a reaction that has become particularly important in recent years, such as ammonia synthesis and carbon dioxide reduction resource conversion. Although various reaction systems have been studied and proposed, we have found and studied the Plasma/Liquid (P/L) reaction as a gas reduction reaction that proceeds at the gas-liquid interface. The P/L reaction is carried out by spraying an activated gas onto the surface of the water phase and proceeding with the reaction of abstracting hydrogen atoms exposed on the surface of the water phase (hydrogen abstraction reaction). This reaction can proceed at room temperature, normal pressure, and without any catalyst. It is a reaction in which gas molecules (atoms) abstract hydrogen from water molecules, so in other words, it is a gas reduction reaction.

In the P/L reaction, various gases such as nitrogen and oxygen can be reduced. In this talk, I will introduce the research results of nitrogen reduction (ammonia NH₃ production) [3-7] and oxygen reduction (hydroxyl radical ·OH and other reactive oxygen production) [2]. In addition, in the research of the P/L reaction between oxygen and water, we have succeeded in developing and commercializing the process device "Radical Vapor Reactor". I will also introduce the "Radical Vapor Reactor", that can generate oxygen radicals with only oxygen and water and expose it to an object, and its various uses [8-10].