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

Kód výsledku v 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>

Nalezeny alternativní kódy

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

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10305 - Fluids and plasma physics (including surface physics)

Projekt

<a href="/cs/project/GA22-11456S" target="_blank" >GA22-11456S: Výzkum fundamentálních interakcí hydrodynamické kavitace a nízkoteplotního plazmatu ke zvýšení dezinfekčních účinků</a><br>

Návaznosti

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

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název periodika

Plasma sources science & technology

ISSN

0963-0252

e-ISSN

1361-6595

Svazek periodika

34

Číslo periodika v rámci svazku

6

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

18

Strana od-do

—

Kód UT WoS článku

001513710700001

EID výsledku v databázi Scopus

2-s2.0-105009152112