[11a-E204-1~9] 8.5 Plasma phenomena, emerging area of plasmas and their new applications

9:15 AM - 9:30 AM JST(12:15 AM - 12:30 AM UTC)Presentation by Applicant for JSAP Young Scientists Presentation Award

[11a-E204-2] Establishment of Plasma-Highspeed Water Column and Droplets Flow System for Net OH Flux Experimental Evaluation

〇(M2)Xiao Yuan¹, Shota Sasaki¹, Kazuki Takeda¹, Siqi Deng¹, Kalyani Barman¹, Toshiro Kaneko¹ (1.Grad. Sch. Of Eng.Tohoku Univ.)

Keywords:

Atmospheric-pressure plasma,plasma-liquid interface,reactive oxygen and nitrogen species

A plasma–highspeed water column and droplet flow system was developed with the aim of quantitatively evaluating the gas–liquid interfacial transfer mechanism of reactive oxygen and nitrogen species from atmospheric pressure plasma into liquid, with particular focus on the net OH flux. By observing and controlling the morphology of the water flow using a highspeed camera, the water within the entire plasma region was regulated to form either a continuous water column or discrete droplets. Through the combination of OH_aq concentration attenuation measurements employing terephthalic acid as a chemical probe and an axially or spherically symmetric reaction diffusion model, more accurate estimation of net OH flux was achieved compared to previous researches.