Pulsed Corona Discharge Induced Hydroxyl Radical Transfer Through the Gas-Liquid Interface

Petri Ajo, Iakov Kornev, Sergei Preis

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

The highly energetic electrons in non-thermal plasma generated by gas phase pulsed corona discharge (PCD) produce hydroxyl (OH) radicals via collision reactions with water molecules. Previous work has established that OH radicals are formed at the plasma-liquid interface, making it an important location for the oxidation of aqueous pollutants. Here, by contacting water as aerosol with PCD plasma, it is shown that OH radicals are produced on the gas side of the interface, and not in the liquid phase. It is also demonstrated that the gas-liquid interfacial boundary poses a barrier for the OH radicals, one they need to cross for reactive affinity with dissolved components, and that this process requires a gaseous atomic H scavenger. For gaseous oxidation, a scavenger, oxygen in common cases, is an advantage but not a requirement. OH radical efficiency in liquid phase reactions is strongly temperature dependent as radical termination reaction rates increase with temperature.

Original languageEnglish
Article number16152
JournalScientific Reports
Volume7
Issue number1
DOIs
Publication statusPublished - 1 Dec 2017

Fingerprint

electric corona
hydroxyl radicals
liquids
gases
liquid phases
oxidation
water
contaminants
affinity
aerosols
reaction kinetics
vapor phases
requirements
collisions
temperature
oxygen
molecules
electrons

ASJC Scopus subject areas

  • General

Cite this

Pulsed Corona Discharge Induced Hydroxyl Radical Transfer Through the Gas-Liquid Interface. / Ajo, Petri; Kornev, Iakov; Preis, Sergei.

In: Scientific Reports, Vol. 7, No. 1, 16152, 01.12.2017.

Research output: Contribution to journalArticle

@article{78741f931ce74ee28bfc326bdefd28d0,
title = "Pulsed Corona Discharge Induced Hydroxyl Radical Transfer Through the Gas-Liquid Interface",
abstract = "The highly energetic electrons in non-thermal plasma generated by gas phase pulsed corona discharge (PCD) produce hydroxyl (OH) radicals via collision reactions with water molecules. Previous work has established that OH radicals are formed at the plasma-liquid interface, making it an important location for the oxidation of aqueous pollutants. Here, by contacting water as aerosol with PCD plasma, it is shown that OH radicals are produced on the gas side of the interface, and not in the liquid phase. It is also demonstrated that the gas-liquid interfacial boundary poses a barrier for the OH radicals, one they need to cross for reactive affinity with dissolved components, and that this process requires a gaseous atomic H scavenger. For gaseous oxidation, a scavenger, oxygen in common cases, is an advantage but not a requirement. OH radical efficiency in liquid phase reactions is strongly temperature dependent as radical termination reaction rates increase with temperature.",
author = "Petri Ajo and Iakov Kornev and Sergei Preis",
year = "2017",
month = "12",
day = "1",
doi = "10.1038/s41598-017-16333-1",
language = "English",
volume = "7",
journal = "Scientific Reports",
issn = "2045-2322",
publisher = "Nature Publishing Group",
number = "1",

}

TY - JOUR

T1 - Pulsed Corona Discharge Induced Hydroxyl Radical Transfer Through the Gas-Liquid Interface

AU - Ajo, Petri

AU - Kornev, Iakov

AU - Preis, Sergei

PY - 2017/12/1

Y1 - 2017/12/1

N2 - The highly energetic electrons in non-thermal plasma generated by gas phase pulsed corona discharge (PCD) produce hydroxyl (OH) radicals via collision reactions with water molecules. Previous work has established that OH radicals are formed at the plasma-liquid interface, making it an important location for the oxidation of aqueous pollutants. Here, by contacting water as aerosol with PCD plasma, it is shown that OH radicals are produced on the gas side of the interface, and not in the liquid phase. It is also demonstrated that the gas-liquid interfacial boundary poses a barrier for the OH radicals, one they need to cross for reactive affinity with dissolved components, and that this process requires a gaseous atomic H scavenger. For gaseous oxidation, a scavenger, oxygen in common cases, is an advantage but not a requirement. OH radical efficiency in liquid phase reactions is strongly temperature dependent as radical termination reaction rates increase with temperature.

AB - The highly energetic electrons in non-thermal plasma generated by gas phase pulsed corona discharge (PCD) produce hydroxyl (OH) radicals via collision reactions with water molecules. Previous work has established that OH radicals are formed at the plasma-liquid interface, making it an important location for the oxidation of aqueous pollutants. Here, by contacting water as aerosol with PCD plasma, it is shown that OH radicals are produced on the gas side of the interface, and not in the liquid phase. It is also demonstrated that the gas-liquid interfacial boundary poses a barrier for the OH radicals, one they need to cross for reactive affinity with dissolved components, and that this process requires a gaseous atomic H scavenger. For gaseous oxidation, a scavenger, oxygen in common cases, is an advantage but not a requirement. OH radical efficiency in liquid phase reactions is strongly temperature dependent as radical termination reaction rates increase with temperature.

UR - http://www.scopus.com/inward/record.url?scp=85034823558&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85034823558&partnerID=8YFLogxK

U2 - 10.1038/s41598-017-16333-1

DO - 10.1038/s41598-017-16333-1

M3 - Article

VL - 7

JO - Scientific Reports

JF - Scientific Reports

SN - 2045-2322

IS - 1

M1 - 16152

ER -