Glow discharge in water cavitation cloud with improved efficiency for hydrogen peroxide production

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26210%2F26%3A0201055" target="_blank" >RIV/00216305:26210/26:0201055 - isvavai.cz</a>

Alternative codes found

RIV/67985939:_____/25:00637052 RIV/00216224:14310/25:00144370

Result on the web

<a href="https://iopscience-iop-org.ezproxy.lib.vutbr.cz/article/10.1088/1361-6595/addf79" target="_blank" >https://iopscience-iop-org.ezproxy.lib.vutbr.cz/article/10.1088/1361-6595/addf79</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1088/1361-6595/addf79" target="_blank" >10.1088/1361-6595/addf79</a>

Result language

angličtina

Original language name

Glow discharge in water cavitation cloud with improved efficiency for hydrogen peroxide production

Original language description

The previously developed AC discharge in a dense hydrodynamic cavitation cloud (HCC) in water (called CaviPlasma) was modified to enhance hydrogen peroxide production efficiency. The experimental setup consisted of a closed water circuit with a reservoir. Treated water was pumped through a Venturi nozzle to create a HCC. Alternating high voltage (HV) imposed on electrodes ignited the discharge in this cloud of water vapors and droplets. Optimization of the hydraulic circuit eliminated the vacuum pump and prolonged the cavitation cloud, so both electrodes are in the cavitation cloud. The absence of the water column between the cavitation cloud's end and the electrode opposite the nozzle significantly reduced the resistance of the discharge branch of the circuit. This change considerably altered the discharge ignition and regime of operation. Consequently, electrical power losses decreased, and higher power delivery to the discharge was achieved. The system operated with input HV power ranging from 0.3 kW to 2 kW and water flow rates from 1.2 m3h-1 to 2.0 m3h-1.These modifications increased the efficiency of hydrogen peroxide (H2O2) production, achieving an energy yield of 12.4 gkWh-1, compared to the previous 9.6 gkWh-1, and a peak production rate of 17.6 gh-1, seven times higher than the former 2.4 gh-1. The discharge properties were studied using optical and electrical diagnostics. Optical emission spectroscopy proved the production of H, O and OH species in the discharge. The time development of the discharge was followed by phase-resolved discharge imaging using an ICCD camera. The positive bias of current flowing in the discharge tube was observed, which could be attributed to the displacement of the positively charged species (ions) flowing in the same direction as the cavitation cloud.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10305 - Fluids and plasma physics (including surface physics)

Project

<a href="/en/project/GA22-11456S" target="_blank" >GA22-11456S: Exploring fundamental interactions of hydrodynamic cavitation and low-temperature plasma to enhance the disinfection effects</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2025

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Plasma sources science & technology

ISSN

0963-0252

e-ISSN

1361-6595

Volume of the periodical

34

Issue of the periodical within the volume

6

Country of publishing house

GB - UNITED KINGDOM

Number of pages

18

Pages from-to

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UT code for WoS article

001513710700001

EID of the result in the Scopus database

2-s2.0-105009152112