scholarly journals INVESTIGATION OF OZONE SYNTHESIS IN THE NEGATIVE PULSED CORONA DISCHARGE IN OXYGEN AT THE COMBINED SUPPLY VOLTAGE

2021 ◽  
pp. 74-77
Author(s):  
V.I. Golota ◽  
B.B. Kadolin ◽  
I.A. Paschenko
Keyword(s):  
Corona Discharge ◽  
Bias Voltage ◽  
Voltage Pulse ◽  
Supply Voltage ◽  
Pulse Amplitude ◽  
Pulsed Corona Discharge ◽  
Voltage Pulse Amplitude ◽  
Pulsed Corona ◽  
Ozone Synthesis ◽  
Optimal Bias

The influence of combined supply voltage parameters (bias voltage and voltage pulse amplitude) on efficiency of ozone synthesis in the negative pulsed corona discharge in oxygen was obtained. Pulse overvoltage led to intensification of discharge processes. Bias voltage applied during the discharge channel relaxation essentially increased the efficiency of ozone synthesis. It was established that the “optimal” bias voltage which provides maximum ozone generation doesn’t depend on voltage pulse amplitude, but depends on input oxygen concentration and generated ozone concentration.

scholarly journals Oxidation of Aqueous Toluene by Gas-Phase Pulsed Corona Discharge in Air-Water Mixtures Followed by Photocatalytic Exhaust Air Cleaning

Catalysts ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 549
Author(s):  
Maarja Kask ◽  
Marina Krichevskaya ◽  
Sergei Preis ◽  
Juri Bolobajev
Keyword(s):  
Corona Discharge ◽  
Gas Phase ◽  
Contact Time ◽  
Closed Loop ◽  
Simultaneous Treatment ◽  
Pulsed Corona Discharge ◽  
Air Cleaning ◽  
Pulsed Corona ◽  
Volatile Organic ◽  
Gaseous Toluene

The treatment of wastewaters containing hazardous volatile organic compounds (VOCs) requires the simultaneous treatment of both water and air. Refractory toluene, extensively studied for its removal, provides a basis for the comparison of its abatement methods. The oxidation of aqueous toluene by gas-phase pulsed corona discharge (PCD) in combination with the subsequent photocatalytic treatment of exhaust air was studied. The PCD treatment showed unequalled energy efficiencies in aqueous and gaseous toluene oxidation, reaching, respectively, up to 10.5 and 29.6 g·kW−1·h−1. The PCD exhaust air contained toluene residues and ozone in concentrations not exceeding 0.1 and 0.6 mg·L−1, respectively. As a result of the subsequent photocatalytic treatment, both airborne residues were eliminated within a contact time with TiO2 as short as 12 s. The results contribute to the possible application of the studied approach in closed-loop energy-saving ventilation systems.

Effects of Pulsed Corona Discharge on SO2Absorption into Water from an SO2/Air Mixture

2003 ◽  
Vol 42 (9) ◽  
pp. 2030-2032
Author(s):  
Joo-Youp Lee ◽  
Soon-Jai Khang ◽  
Tim C. Keener
Keyword(s):  
Corona Discharge ◽  
Pulsed Corona Discharge ◽  
Pulsed Corona

Pulsed corona discharge for degradation of aqueous humic substances

2011 ◽  
Vol 11 (2) ◽  
pp. 238-245 ◽  
Author(s):  
Iris Panorel ◽  
Iakov Kornev ◽  
Henry Hatakka ◽  
Sergei Preis
Keyword(s):  
Energy Efficiency ◽  
Corona Discharge ◽  
Humic Substances ◽  
Pulse Generator ◽  
Pulse Repetition Frequency ◽  
Water Flow Rate ◽  
Oh Radicals ◽  
Pulsed Corona Discharge ◽  
Pulsed Corona ◽  
Voltage Pulse Generator

The research into oxidation of aqueous humic substances (HS) with pulsed corona discharge (PCD) was undertaken to estimate the energy efficiency of the treatment. The PCD system consists of a voltage pulse generator and reactor, in which the gas-phase discharge generating OH radicals and ozone treats the water showered between electrodes. The influence of HS initial concentration, pulse repetition frequency, water flow rate, and the atmosphere composition was evaluated by the decrease in total organic carbon (TOC) and color. The PCD treatment reduced TOC by 40 to 50% and the color by up to 97%. The PCD energy efficiency ranged about 20 g kW−1 h−1 in air and 30 g kW−1 h−1 in oxygen for the lowest initial color of about 50 Pt-Co degrees. Ozone contributed about 30% to the color reduction and only 15% to the reduction in TOC, indicating predominant role of OH radicals in mineralization of oxidation by-products.

Extracting salt from hypersaline water by pulsed corona discharge

2021 ◽  
pp. 1-8
Author(s):  
Kristy Emanuel Silva Fontes ◽  
Liliane Ferreira Araújo de Almada ◽  
Jussier de Oliveira Vitoriano ◽  
Clodomiro Alves Júnior
Keyword(s):  
Corona Discharge ◽  
Pulsed Corona Discharge ◽  
Pulsed Corona ◽  
Hypersaline Water
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