Characteristics of liquid‐phase continuous arc discharge plasma. Issue 11 (5th July 2022)

• Record Type: Journal Article
• Authors: Wang, Quanli; Xin, Yanbin; Sun, Bing
• Is Part Of: Plasma processes and polymers. Volume 19:Issue 11(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-07-05
• Subjects: continuous arc discharge plasma -- discharge characteristics -- liquid‐phase; Plasma polymerization -- Periodicals; Plasma-enhanced chemical vapor deposition -- Periodicals; Plasma chemistry -- Periodicals
• DOI: 10.1002/ppap.202200046
• Languages: English
• ISSNs: 1612-8850

Abstract

Abstract: Liquid‐phase discharge has the advantages of high plasma density, simultaneous generation of multiple physical and chemical effects, and high gas‐liquid mass transfer efficiency. However, the large‐capacity treatment of liquid by plasma has always been a research difficulty. In this study, liquid‐phase continuous arc (LCA) discharge plasma is realized for the first time, which can quickly propagate for a long distance in liquid. To better understand this new type of liquid‐phase discharge, the time‐space characteristics, electrical characteristics, optical characteristics and particle characteristics of the LCA discharge plasma are diagnosed. The results show that the LCA discharge plasma can achieve a rapid propagation over 1 m in the liquid, and the propagation time is on the order of milliseconds. Meanwhile, the discharge can directly generate a variety of active species (·OH, ·O, ·H, H2 O2 ) in the liquid, which can be continuously produced as the plasma moves. The LCA discharge plasma has good application prospects in water treatment, energy conversion, and so on. Abstract : This is a study on a new type of discharge plasma called liquid‐phase continuous arc (LCA), which can achieve long‐distance and high‐speed plasma transportation in liquids. LCA can be maintained at a nonequilibrium state with high plasma density and high gas‐liquid mass transfer efficiency; meanwhile, LCA can generate reactive oxygen species with high production rate, which can be also continuously produced as the plasma moves. These advantages make LCA discharge have great application prospects in the fields of large‐capacity water treatment, new material preparation and energy conversion.