The Characteristics of NO Reduction in the Reactor With Dielectric Barrier Discharge

2009 ◽  
Author(s):  
Bao-Ming Sun ◽  
Shui-E Yin
Keyword(s):  
Dielectric Barrier Discharge ◽  
Oxygen Content ◽  
Removal Efficiency ◽  
Barrier Discharge ◽  
Nitrogen Atmosphere ◽  
Discharge Power ◽  
Gas Velocity ◽  
Dielectric Barrier ◽  
No Removal ◽  
Removal Efficiencies

The conventional techniques, which are being used to clean the flue gases such as catalytic reduction method for NO removal, wet and dry scrubbers for SO2 removal and ESP for particulate removal, are becoming more expensive and less suitable for small plants and mobile emission sources. Non-thermal plasma (NTP) techniques utilizing electrical discharges give an innovative approach for economical solution of gas cleaning. The studies present recent work on applying the electrical discharge plasma technology for treating gaseous pollutants, in general, and nitric oxide, in particular, as this is one of the major contributors to air pollution. The present works focuses attention on dielectric barrier discharge technique for nitric oxide removal from simulated gas compositions and investigate the effect of various operating parameters on the NO removal efficiencies at room temperature. The effects of various parameters, viz. discharge power, gas velocity, initial NO concentration (ppm), gas mixture composition, etc., on NO removal efficiency are discussed. Studies are divided into two parts: in the nitrogen atmosphere and argon atmosphere respectively, in order to investigate the effect of various operating parameters on the NO removal efficiencies at room temperature. The results in nitrogen atmosphere indicate that the influence of the discharge power, oxygen content and different initial concentration on NO removal efficiency are also studied. Conclusion that increasing discharge power is in favor of the NO removal. Adding oxygen reduce the NO removal efficiency significantly, and changing the NO initial concentration effected on NO removal efficiency but nor as good as the factors of discharge power, oxygen content. In the argon atmosphere, the dielectric barrier discharge require lower voltage level. The effect of the discharge power, gas velocity and oxygen content on NO removal efficiencies are studied and some conclusions be obtained, increasing discharge power and lowing flue gas velocity would conducive to removal, adding oxygen would hinder the removal of NO. Further result and comparative study of various cases be presented in this paper.

Effect of Gas Composition on Removal of NO by Dielectric Barrier Discharge

2013 ◽  
Vol 773 ◽  
pp. 917-922
Author(s):  
Xin Dai ◽  
Dong Wang
Keyword(s):  
Dielectric Barrier Discharge ◽  
Removal Efficiency ◽  
Barrier Discharge ◽  
Removal Rate ◽  
Plasma Reactor ◽  
Single Layer ◽  
Input Power ◽  
Gas Composition ◽  
Dielectric Barrier ◽  
No Removal

In order to understand the reaction mechanisms of NO removal in Dielectric Barrier Discharge reactor, the effect of gas composition on plasma reduction of NO was studied. In this experiment, single-layer barrier tube plasma reactor was used to study the influence of O2and C2H4(ethylene) to NO removal rate. The result indicated that: with the increase of input power, NO removal efficiency increased gradually in the N2/NO system; The O2added to the gas caused removal efficiency to reduce. There was no significant effect on removal of NO with C2H4added alone. In the N2/NO/O2/C2H4gas condition, C2H4will promote the conversion from NO to NO2, the removal efficiency of NO increased as more C2H4was added. And the presence of C2H4was conductive to reduce input power.

scholarly journals Characteristics and mechanism of toluene removal by double dielectric barrier discharge combined with an Fe2O3/TiO2/γ-Al2O3 catalyst

RSC Advances ◽  
2020 ◽  
Vol 10 (68) ◽  
pp. 41511-41522
Author(s):  
Rui Wang ◽  
Jiaze Ren ◽  
Jiangyou Wu ◽  
Lanlan Wu
Keyword(s):  
Dielectric Barrier Discharge ◽  
Removal Efficiency ◽  
Barrier Discharge ◽  
Dielectric Barrier ◽  
Toluene Removal ◽  
Al2o3 Catalyst

The removal efficiency of toluene and CO2 selectivity were improved and the production of O3 and NOx was reduced by using DBD combined with different catalysts.

A half-bridge IGBT drive and protection circuit in dielectric barrier discharge power supply

Circuit World ◽  
2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Xingquan Wang ◽  
Xiuyuan Lu ◽  
Wei Chen ◽  
Fengpeng Wang ◽  
Jun Huang ◽  
...  
Keyword(s):  
Response Time ◽  
Dielectric Barrier Discharge ◽  
Duty Cycle ◽  
Power Supply ◽  
Barrier Discharge ◽  
Discharge Power ◽  
Current Response ◽  
Dielectric Barrier ◽  
Content Type ◽  
Protection Circuit

Purpose This paper aims to improve the general circuit of driving and protection based on insulated gate bipolar transistor (IGBT) in dielectric barrier discharge power supply by designing a novel half-bridge inverter circuit with discrete components. Design/methodology/approach With one SG3524 chip, the structure based on discrete components is used to design the IGBT drive circuit. The driving waveform is isolated and sent out by photo-coupler 6N137. The protection circuit is realized by Hall sensor directly detecting the main circuit current, supplemented by a few components, including diodes, resistors, capacitors and triodes. It improves the reliability of the protection circuit. Findings In the driving circuit, the phase difference of signals from two channels are 180°. Moreover, when the duty cycle is set at 40%, it can ensure sufficient pulse width modulation response time. In the protection circuit, when over-current occurs, an intermittent output signal is automatically sent out. Furthermore, the over-current response time can be controlled independently. The peak voltage can be adjusted continuously from 0 to 30 kV with its frequency from 8 to 25 kHz and the power output up to 150 W. Originality/value The novel circuit of driving and protection makes not only its structure simpler and easier to be realized but also key parameters, such as frequency, the duty cycle and the driving voltage, continuously adjustable. Moreover, the power supply is suitable for other discharges such as corona discharge and jet discharge.

scholarly journals A model of surface dielectric barrier discharge power

2021 ◽  
Vol 118 (15) ◽  
pp. 154102
Author(s):  
Nicholas D. Wilde ◽  
Haofeng Xu ◽  
Nicolas Gomez-Vega ◽  
Steven R. H. Barrett
Keyword(s):  
Dielectric Barrier Discharge ◽  
Barrier Discharge ◽  
Discharge Power ◽  
Dielectric Barrier ◽  
Surface Dielectric Barrier Discharge
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