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Preparation of activated water using a hollow cathode discharge device with water as the electrode
ID：75 View Protection：ATTENDEE Updated Time：2025-10-11 22:46:35 Hits：196 Poster Presentation

Start Time：2025-11-09 09:07（Asia/Shanghai）

Duration：1min

Session：P Poster presentation » P11.Renewable energy system

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Abstract
Plasma activated water (PAW) faces limitations in large-scale applications due to its high energy cost, partly caused by insufficient interaction between plasma and liquid. This study develops an atmospheric-pressure hollow cathode discharge system using a water electrode, which effectively minimizes electrode erosion while substantially increasing the plasma-water contact area, leading to improving energy transfer efficiency and activation performance. Through systematic investigation of discharge parameters influencing solution properties (pH, H₂O₂, NO₂⁻, NO₃⁻, ONOO⁻), the results reveals monotonic variations with reaction time and optimal values at specific nitrogen ratios. Energy cost analysis demonstrates that under 60% nitrogen discharge for 5 minutes, the energy cost can be reduced to 27.73 MJ/mol—significantly lower than the minimum value reported in existing literature (40.60 MJ/mol). This work confirms the potential of hollow cathode discharge for energy-efficient PAW production and offers crucial guidance for energy cost optimization.
 
Keywords
hollow cathode discharge, plasma activated water, electrodeless discharge, energy cost
Speaker
Yulin Xu
None School of Electrical and Electronic Engineering, Huazhong University of Science and Technology

Submission Author
Yulin Xu School of Electrical and Electronic Engineering, Huazhong University of Science and Technology
Xinpei Lu School of Electrical and Electronic Engineering, Huazhong University of Science and Technology
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Important Date

  • Conference Date

    Nov 07

    2025

    to

    Nov 09

    2025

  • Oct 30 2025

    Draft paper submission deadline

  • Nov 10 2025

    Registration deadline

Sponsored By
IEEE西南交通大学IAS学生分会
Organized By
西南交通大学电气工程学院
SPACI车网关系研究室
四川大学电力系统稳定与高压直流输电研究团队
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