scholarly journals Active Species Generation in Gas–liquid Discharge Non-thermal Plasma: Operating Conditions, Influencing Factors, and Mechanisms

2021 ◽  
pp. ArticleID:210640
Author(s):  
Keke Ma ◽  
Keyword(s):  
Influencing Factors ◽  
Thermal Plasma ◽  
Active Species ◽  
Operating Conditions ◽  
Liquid Discharge ◽  
Non Thermal Plasma

Degradation and mineralization of ciprofloxacin by gas–liquid discharge non-thermal plasma

2018 ◽  
Vol 21 (1) ◽  
pp. 015501 ◽  
Author(s):  
Shuheng HU ◽  
Xinghao LIU ◽  
Zimu XU ◽  
Jiaquan WANG ◽  
Yunxia LI ◽  
...  
Keyword(s):  
Thermal Plasma ◽  
Liquid Discharge ◽  
Non Thermal Plasma

Dilute Trichloroethylene Decomposition in Air by Using Non-Thermal Plasma - Catalyst Effect

2003 ◽  
Vol 6 (1) ◽  
Author(s):  
Tetsuji Oda ◽  
Kei Yamaji
Keyword(s):  
Energy Efficiency ◽  
Thermal Plasma ◽  
Plasma Processing ◽  
Operating Conditions ◽  
Plasma Region ◽  
Enhancing Effect ◽  
Long Period ◽  
Thermal Plasma Processing ◽  
Non Thermal Plasma ◽  
Catalyst Effect

AbstractDilute trichloroethylene (TCE) decomposition by the non-thermal plasma processing is investigated concerning with the enhancement of the removal-energy efficiency by use of the catalyst. Tested catalysts are zeolite, titania, vanadium oxide and tungsten oxide, which are inserted into the plasma region as pellets of a few mm spheres or discs. As the zeolite adsorbs too much TCE during a long period, the enhancing effect on the removal energy efficiency by the zeolite is not yet clear, but other catalysts can surely reduce the necessary energy to decompose TCE. As there are still too many parameters affecting the removal performance, the best catalyst, as enhancing the plasma processing, and that operating conditions will be analyzed in future.

scholarly journals The Prototype of Non-thermal Plasma After treatment System for Simultaneous Reduction of Nitrogen Oxide Emission in Flue Gas

2021 ◽  
Vol 302 ◽  
pp. 01010
Author(s):  
Dararat Laohalertdecha ◽  
Kampanart Theinnoi ◽  
Sak Sittichompoo
Keyword(s):  
Nitrogen Oxides ◽  
Nitrogen Oxide ◽  
Flue Gas ◽  
Thermal Plasma ◽  
Power Plants ◽  
Gas Flow ◽  
Nox Reduction ◽  
Combustion Process ◽  
Operating Conditions ◽  
Non Thermal Plasma

Nowadays, global warming is the main environmental problems all over the world. The air pollutants mainly from the burning of fossil fuels and coal in power plants, transportation, and automobiles. There are release major point emission of the atmosphere. The nitrogen oxides are the most relevant for air pollution that contribute to the formation of photochemical smog and acid rain. Numerous methods have been studied to eliminate the nitrogen oxides such as the use low-nitrogen fuels technology, the selective catalytic reduction (SCR), wet scrubbing. The aim of this research is investigated non-thermal plasma (NTP) techniques offer an innovation to eliminate both nitrogen oxide (NOx) and soot emissions from combustion. This study is used to selectively transfer input electrical energy to electrons without expending this in heating the entire gas flow which creates free radicals in the flue gases. The simulated flue gas from combustion process is applied to the system. The results showed that the prototype of nonthermal plasma system is shown the highly efficient of NOx removal was achieved. However, the optimised of NTP operating conditions are required to enhance the NOx reduction activities.

scholarly journals Optimized Pretreatment of Non-Thermal Plasma for Advanced Sewage Oxidation

2020 ◽  
Vol 17 (20) ◽  
pp. 7694
Author(s):  
Hee-Jun Kim ◽  
Chan-Hee Won ◽  
Hyun-Woo Kim
Keyword(s):  
Thermal Plasma ◽  
Contact Time ◽  
Oxygen Demand ◽  
Advanced Oxidation ◽  
Operating Conditions ◽  
Efficient Operation ◽  
Higher Temperature ◽  
Non Thermal Plasma ◽  
Optimal Efficiency ◽  
Optimized Conditions

This study investigates how the non-thermal plasma (NTP) process leads to advanced oxidation of sewage using response surface methodology. For environmentally viable and efficient operation of the NTP process, temperature and contact time were selected as two important independent variables. Their impacts on the performance were tested following an experimental design to figure out optimal operating conditions. Based on obtained treatment efficiency, statistically optimized conditions were derived by using an approach adapting the central composite design. Results show that coupling 40 °C of temperature and 4 h of contact time demonstrate optimal performance for total chemical oxygen demand (TCOD, 59%) and total suspended solids (85%), respectively. This implies that NTP may present efficient particulate destruction leading to organic solids dissolution. Statistical analysis reveals that the contact time shows more significant dependency than the temperature on the advanced oxidation of TCOD, possibly due to dissolved organic material. For total nitrogen removal, on the contrary, the optimal efficiency was strongly related to the higher temperature (~68 °C). This work provides an inroad to considering how NTP can optimally contribute to better oxidation of multiple pollutants.

scholarly journals Degradation and mechanism analysis of chloroxylenol in aqueous solution by gas–liquid discharge plasma combined with ozonation

RSC Advances ◽  
2021 ◽  
Vol 11 (21) ◽  
pp. 12907-12914
Author(s):  
Keke Ma ◽  
Lu Zhou ◽  
Yu Bai ◽  
Yiying Xin ◽  
Mingru Chen ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Broad Spectrum ◽  
Thermal Plasma ◽  
Antibacterial Agent ◽  
Discharge Plasma ◽  
Mechanism Analysis ◽  
Liquid Discharge ◽  
Non Thermal Plasma

Gas–liquid discharge non-thermal plasma (NTP) coupled with an ozonation reactor was used to investigate the removal of a broad-spectrum antibacterial agent, chloroxylenol (PCMX), from aqueous solution.

scholarly journals Paracetamol degradation in aqueous solution by non-thermal plasma

2017 ◽  
Vol 79 (3) ◽  
pp. 30802 ◽  
Author(s):  
Yasmine Baloul ◽  
Olivier Aubry ◽  
Hervé Rabat ◽  
Cyril Colas ◽  
Benoît Maunit ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Thermal Plasma ◽  
Barrier Discharge ◽  
High Resolution Mass Spectrometry ◽  
Operating Conditions ◽  
Energy Yield ◽  
Gas Composition ◽  
Treatment Efficiency ◽  
Electrical Parameters ◽  
Non Thermal Plasma

This study deals with paracetamol degradation in water using a non-thermal plasma (NTP) created by a dielectric barrier discharge (DBD). The effects of the NTP operating conditions on the degradation were studied, showing that the treatment efficiency of the process was highly dependent on the electrical parameters and working gas composition in the reactor containing the aqueous solution. A conversion rate higher than 99% was reached with an energy yield of 12 g/kWh. High resolution mass spectrometry (HRMS) measurements showed that the main species produced in water during the process were nitrogen compounds, carboxylic acids and aromatic compounds.

The Roles of Various Plasma Active Species in Toluene Degradation by Non-thermal Plasma and Plasma Catalysis

2019 ◽  
Vol 39 (6) ◽  
pp. 1469-1482 ◽  
Author(s):  
Hua Song ◽  
Yue Peng ◽  
Shuai Liu ◽  
Shupei Bai ◽  
Xiaowei Hong ◽  
...  
Keyword(s):  
Thermal Plasma ◽  
Active Species ◽  
Toluene Degradation ◽  
Plasma Catalysis ◽  
Non Thermal Plasma

The Effect of Specific Input Energy on Promotion of NO–NO2 of Diesel Engine with Non-Thermal Plasma Technology

2011 ◽  
Vol 204-210 ◽  
pp. 955-959 ◽  
Author(s):  
Yi Xi Cai ◽  
Li Li Lei ◽  
Pan Wang
Keyword(s):  
Diesel Engine ◽  
Thermal Plasma ◽  
Active Species ◽  
Bench Test ◽  
Input Energy ◽  
Plasma Technology ◽  
Specific Input ◽  
Specific Input Energy ◽  
Non Thermal Plasma ◽  
Thermal Plasma Technology

The removal of diesel exhausts by non-thermal plasma technology has been investigated focused on the simulation gas experiment at atmospheric pressure and room temperature for many years. However, the research for real diesel engine is need to be further studied. In the experiments, a non-thermal plasma (NTP) reactor was designed based upon dielectric barrier discharge. NO/NO2 conversion was studied as a function of the specific input energy (SIE) by varying the frequency and voltage applied on the NTP reactor through bench test. Results showed that NTP SIE was increased with the voltage at each frequency. The conversion of NO to NO2 was increased at higher NTP SIE. However, NO will further be converted to other active species but not only NO2.

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