Competitive reactions in Cl− solutions treated by plasma-supplied O atoms

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389021%3A_____%2F20%3A00536059" target="_blank" >RIV/61389021:_____/20:00536059 - isvavai.cz</a>

Výsledek na webu

<a href="https://iopscience.iop.org/article/10.1088/1361-6463/abb5d6" target="_blank" >https://iopscience.iop.org/article/10.1088/1361-6463/abb5d6</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1088/1361-6463/abb5d6" target="_blank" >10.1088/1361-6463/abb5d6</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Competitive reactions in Cl− solutions treated by plasma-supplied O atoms

Popis výsledku v původním jazyce

Reactions accompanying the hypochlorite formation in Cl− solutions oxidized by plasma-supplied O atoms were studied. The concentration of oxychlorine compounds from reaction of O atoms with solutions of NaCl, NaOCl and NaClO2 was measured. The concentration dependence of O + Cl− reaction rate was evaluated using the simplified kinetic model leading to estimation of the 2nd order rate constant, k = 1.64 ± 0.01 × 105 M−1s−1. The limiting reaction rate at highly concentrated NaCl corresponds well with the delivery rate of O atoms to the gas-liquid interface calculated from the previously measured O concentration at the plasma jet outlet. Virtually all plasma-supplied O atoms can be captured by Cl− ions in highly concentrated solutions. The measurements confirmed the reactions O + OCl−, and O + ClO2− as loss channels decreasing the hypochlorite production in O-treated Cl− solutions. These loss channels are less effective at more acidic pH, where the formation of ClO2− is minimized and as a consequence, also the solution post-discharge reactivity. The validity of described reaction system was confirmed by chemical kinetics modelling. The fitted rate coefficients for the O reactions with ionic Cl forms were 3–4 orders of magnitude lower than those predicted in the literature.

Název v anglickém jazyce

Competitive reactions in Cl− solutions treated by plasma-supplied O atoms

Popis výsledku anglicky

Reactions accompanying the hypochlorite formation in Cl− solutions oxidized by plasma-supplied O atoms were studied. The concentration of oxychlorine compounds from reaction of O atoms with solutions of NaCl, NaOCl and NaClO2 was measured. The concentration dependence of O + Cl− reaction rate was evaluated using the simplified kinetic model leading to estimation of the 2nd order rate constant, k = 1.64 ± 0.01 × 105 M−1s−1. The limiting reaction rate at highly concentrated NaCl corresponds well with the delivery rate of O atoms to the gas-liquid interface calculated from the previously measured O concentration at the plasma jet outlet. Virtually all plasma-supplied O atoms can be captured by Cl− ions in highly concentrated solutions. The measurements confirmed the reactions O + OCl−, and O + ClO2− as loss channels decreasing the hypochlorite production in O-treated Cl− solutions. These loss channels are less effective at more acidic pH, where the formation of ClO2− is minimized and as a consequence, also the solution post-discharge reactivity. The validity of described reaction system was confirmed by chemical kinetics modelling. The fitted rate coefficients for the O reactions with ionic Cl forms were 3–4 orders of magnitude lower than those predicted in the literature.

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/GA19-25026S" target="_blank" >GA19-25026S: Charakterizace chemicky reaktivních kapalin produkovaných nerovnovážným plazmatem</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2020

Kód důvěrnosti údajů

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

Název periodika

Journal of Physics D-Applied Physics

ISSN

0022-3727

e-ISSN

—

Svazek periodika

53

Číslo periodika v rámci svazku

50

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

13

Strana od-do

505206

Kód UT WoS článku

000576999100001

EID výsledku v databázi Scopus

2-s2.0-85095832473