Non-Thermal Plasma for indoor air treatment: Toluene degradation in a corona discharge at ppbv levels

2017 ◽  
Vol 118 ◽  
pp. 194-205 ◽  
Author(s):  
Michel Ondarts ◽  
Wafa Hajji ◽  
Jonathan Outin ◽  
Timea Bejat ◽  
Evelyne Gonze
Keyword(s):  
Corona Discharge ◽  
Indoor Air ◽  
Thermal Plasma ◽  
Toluene Degradation ◽  
Air Treatment ◽  
Non Thermal Plasma

scholarly journals Indoor air quality improvement and purification by atmospheric pressure Non-Thermal Plasma (NTP)

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Prince Junior Asilevi ◽  
Patrick Boakye ◽  
Sampson Oduro-Kwarteng ◽  
Bernard Fei-Baffoe ◽  
Yen Adams Sokama-Neuyam
Keyword(s):  
Air Quality ◽  
Built Environment ◽  
Indoor Air Quality ◽  
Removal Efficiency ◽  
Indoor Air ◽  
Thermal Plasma ◽  
Processing Parameters ◽  
Optimum Conditions ◽  
Non Thermal Plasma ◽  
The Impact

AbstractNon-thermal plasma (NTP) is a promising technology for the improvement of indoor air quality (IAQ) by removing volatile organic compounds (VOCs) through advanced oxidation process (AOP). In this paper, authors developed a laboratory scale dielectric barrier discharge (DBD) reactor which generates atmospheric NTP to study the removal of low-concentration formaldehyde (HCHO), a typical indoor air VOC in the built environment associated with cancer and leukemia, under different processing conditions. Strong ionization NTP was generated between the DBD electrodes by a pulse power zero-voltage switching flyback transformer (ZVS-FBT), which caused ionization of air molecules leading to active species formation to convert HCHO into carbon dioxide (CO2) and water vapor (H2O). The impact of key electrical and physical processing parameters i.e. discharge power (P), initial concentration (Cin), flow rate (F), and relative humidity (RH) which affect the formaldehyde removal efficiency (ɳ) were studied to determine optimum conditions. Results show that, the correlation coefficient (R2) of removal efficiency dependence on the processing parameters follow the order R2 (F) = 0.99 > R2 (RH) = 0.96, > R2 (Cin) = 0.94 > R2 (P) = 0.93. The removal efficiency reached 99% under the optimum conditions of P = 0.6 W, Cin = 0.1 ppm, F = 0.2 m3/h, and RH = 65% with no secondary pollution. The study provided a theoretical and experimental basis for the application of DBD plasma for air purification in the built environment.

Toluene degradation by non-thermal plasma combined with a ferroelectric catalyst

Chemosphere ◽  
2013 ◽  
Vol 92 (10) ◽  
pp. 1390-1395 ◽  
Author(s):  
Wen-Jun Liang ◽  
Lin Ma ◽  
Huan Liu ◽  
Jian Li
Keyword(s):  
Thermal Plasma ◽  
Toluene Degradation ◽  
Non Thermal Plasma

scholarly journals Materials degradation in non- thermal plasma generators by corona discharge

2021 ◽  
Author(s):  
Mar Cogollo ◽  
Adrián López Arrabal ◽  
Andrés Díaz Lantada ◽  
M. Vega Aguirre
Keyword(s):  
Corona Discharge ◽  
Thermal Plasma ◽  
Fatigue Behaviour ◽  
Plasma Process ◽  
Space Applications ◽  
Non Thermal Plasma ◽  
Negative Exponential ◽  
Complex Phenomena ◽  
Final System ◽  
Device Operation

Abstract Atmospheric corona discharge devices are being studied as innovative systems for cooling, sterilization and propulsion, in several industrial fields, from robotics to medical devices, from drones to space applications. However, their industrial scale implementation still requires additional understanding of several complex phenomena, such as corrosion, degradation and fatigue behaviour, which may affect final system performance. This study focuses on the corrosive behaviour of wires that perform as a high-voltage electrodes subject to DC positive corona discharge in atmospheric air. The experiments demonstrate that the non-thermal plasma process promotes the growth of the oxidative films and modifies the physicochemical properties of the materials chosen as corona electrodes, hence affecting device operation. Surfaces exposed to this non-thermal plasma are electrically characterized by negative exponential decay of time-depend power and analysed with SEM. Implications on performance are analysed and discussed.

Comparison of fungicidal properties of non-thermal plasma produced by corona discharge and dielectric barrier discharge

2017 ◽  
Vol 63 (1) ◽  
pp. 63-68 ◽  
Author(s):  
J. Julák ◽  
H. Soušková ◽  
V. Scholtz ◽  
E. Kvasničková ◽  
D. Savická ◽  
...  
Keyword(s):  
Corona Discharge ◽  
Dielectric Barrier Discharge ◽  
Thermal Plasma ◽  
Barrier Discharge ◽  
Dielectric Barrier ◽  
Non Thermal Plasma

Non-thermal plasma generation by using back corona discharge on catalyst

2013 ◽  
Vol 71 (3) ◽  
pp. 179-184 ◽  
Author(s):  
Fada Feng ◽  
Lingling Ye ◽  
Ji Liu ◽  
Keping Yan
Keyword(s):  
Corona Discharge ◽  
Thermal Plasma ◽  
Plasma Generation ◽  
Non Thermal Plasma

Study on Effects of Nano-Photocatalysis and Non-Thermal Plasma on the Removal of Indoor HCHO

2009 ◽  
Author(s):  
Yuanwei Lu ◽  
Dinghui Wang ◽  
Chongfang Ma
Keyword(s):  
Indoor Air ◽  
Thermal Plasma ◽  
Synergetic Effect ◽  
Experimental Results ◽  
Electrode Configuration ◽  
Air Purification ◽  
Plate Electrode ◽  
Low Level ◽  
Non Thermal Plasma ◽  
Indoor Air Purification

Photocatalysis is an emerging and promising technology for indoor air purification. This photocatalytic oxidation (PCO) method is effective in the case of a higher pollutant concentration, but its wide application in indoor air purification is limited due to the low level of indoor air contaminants. In order to improve the removal of pollutants in indoor air, we have evaluated the photocatalytic performance over the nanosized TiO2 particles immobilized on the surface of an activated carbon (AC) filter for the removal of formaldehyde (HCHO). However the pollutant removal capacity is low at the low level of indoor HCHO over the TiO2/AC film because the predominant influence of residence time during this reaction. In order to improve the photocatalytic removal amount of formaldehyde (HCHO) in indoor air, we studied the combining effect of photocatalysis technology with a non-thermal plasma (NTP) technology on the removal of in door HCHO. Two different plasma electrode configurations, that is wire-to-plate and needle-to-plate electrode configuration, were built and the removal of HCHO was studied by experiment. The experimental results showed that the wire-to-plate electrode configuration is more effective for the HCHO removal than the needle-to-plate electrode configurations. The experimental results using wire-to-plate electrode configuration showed that the removal of HCHO can be enhanced and the removal amount of indoor HCHO can be improved by the combination of PCO and NTP and the combination of PCO and NTP showed the synergetic effect for the indoor HCHO removal. So the combination of PCO and NTP might be a good route for the practical application of photocatalytic technology in indoor air purification.

scholarly journals Indoor Air Quality Improvement and Purification by Atmospheric Pressure Non-Thermal Plasma (NTP)

2021 ◽  
Author(s):  
Prince Junior Asilevi ◽  
Patrick Boakye ◽  
Sampson Oduro-Kwarteng ◽  
Bernard Fei-Baffoe ◽  
Yen Adams Sokama-Neuyam
Keyword(s):  
Air Quality ◽  
Built Environment ◽  
Indoor Air Quality ◽  
Removal Efficiency ◽  
Indoor Air ◽  
Thermal Plasma ◽  
Processing Parameters ◽  
Optimum Conditions ◽  
Non Thermal Plasma ◽  
The Impact

Abstract Non-thermal plasma (NTP) is a promising technology for the improvement of indoor air quality (IAQ) by removing volatile organic compounds (VOCs) through advanced oxidation process (AOP). In this paper, authors developed a laboratory scale dielectric barrier discharge (DBD) reactor which generates atmospheric NTP to study the removal of low-concentration formaldehyde (HCHO), a typical indoor air VOC in the built environment associated with cancer and leukemia, under different processing conditions. Strong ionization NTP was generated between the DBD electrodes by a pulse power zero-voltage switching flyback transformer (ZVS-FBT), which caused ionization of air molecules leading to active species formation to convert HCHO into carbon dioxide (CO2) and water vapor (H2O). The impact of key electrical and physical processing parameters i.e. discharge power (P), initial concentration (Cin), flow rate (F), and relative humidity (RH) which affect the formaldehyde removal efficiency (ɳ) were studied to determine optimum conditions. Results show that, the correlation coefficient (R²) of removal efficiency dependence on the processing parameters follow the order R² (F) = 0.99 > R² (RH) = 0.96, > R² (Cin) = 0.94> R² (P) = 0.93. The removal efficiency reached 98.45% under the optimum conditions of P=0.6 W, Cin=0.1 ppm, F=0.2 m3/h, and RH=65% with no secondary pollution. The study provided a theoretical and experimental basis for the application of DBD plasma for air purification in the built environment.

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