scholarly journals Study on the Effect of Structure Parameters on NO Oxidation in DBD Reactor under Oxygen-Enriched Condition

2020 ◽  
Vol 10 (19) ◽  
pp. 6766
Author(s):  
Yunkai Cai ◽  
Lin Lu ◽  
Peng Li
Keyword(s):  
Energy Efficiency ◽  
Electrode Material ◽  
Diesel Exhaust ◽  
Secondary Electron Emission ◽  
No Oxidation ◽  
Electrode Diameter ◽  
Secondary Electron Emission Coefficient ◽  
Dbd Reactor ◽  
Gas Gap ◽  
Oxidation Efficiency

To improve NO oxidation and energy efficiency, the effect of dielectric barrier discharge reactor structure on NO oxidation was studied experimentally in simulated diesel exhaust at atmospheric pressure. The mixture of 15% O2/N2 (balance)/860 ppm NOX (92% NO + 8% NO2) was used as simulated diesel exhaust. The results show that DBD reactor with 100-mm electrode length has the highest oxidation degree of NOX and energy efficiency. NO oxidation efficiency is promoted and the generation of NO is inhibited significantly by increasing the inner electrode diameter. Increasing the inner electrode diameter not only improve the E/N, but also makes the distribution of E/N more concentrated in the gas gap. The secondary electron emission coefficient (γ) of electrode material is closely related to electron energy and cannot be considered as a constant, which causes the different performance of electrode material for NO oxidation under different gas gap conditions. Compared with the rod electrode, the screw electrode has a higher electric field strength near the top of the screw, which promotes the generation of N radicals and inhibits the generation of O radicals. Rod electrode has a higher NO oxidation and energy efficiency than screw electrode under oxygen-enriched condition.

scholarly journals CRYSTALLOGRAPHIC ORIENTATION INFLUENCE ON SECONDARY ELECTRON EMISSION COEFFICIENT OF A SINGLE CRYSTAL OF SYNTHETIC DIAMOND

2018 ◽  
Vol 59 (8) ◽  
pp. 21
Author(s):  
Vladimir Yu. Sadovoy ◽  
Vladimir D. Blank ◽  
Sergey A. Terentiev ◽  
Dmitriy V. Teteruk ◽  
Sergey Yu. Troschiev
Keyword(s):  
Single Crystal ◽  
Electron Emission ◽  
Crystallographic Orientation ◽  
Beam Energy ◽  
Secondary Electron ◽  
Secondary Electron Emission ◽  
Primary Beam ◽  
Emission Coefficient ◽  
Secondary Electron Emission Coefficient ◽  
Single Crystal Diamond

Dependence of secondary electron emission coefficient on the chosen crystallographic orientation for a synthetic single crystal diamond of type IIb, grown up by method of a temperature gradient, was investigated. The type IIb of single crystal diamond was chosen because of wide applicability in different areas of microelectronics and the semiconductor properties. Quantitative measurements of secondary electron emission coefficients with energy of primary beam about 7 keV and above for various crystallographic orientations was carried out: the highest coefficient of secondary electronic emission are recorded for the direction (100), cubic sector, and also in intergrowth area that is confirmed by a picture of distribution of the luminescence intensity for various sectors of a single crystal received by means of true secondary electrons detector of scanning electron microscope. The results for (100) area are outstanding: 8.18 at primary beam energy of 7 keV, 10.13 at 10 keV, 49.78 at 30 keV. The results for intergrowth area are similar: 10.10 at primary beam energy of 7 keV, 13.56 at 10 keV, 64.41 at 30 keV. The crystallographic directions (111) have shown secondary electron emission coefficient 4-6 times lower in comparison with (100) and intergrowth area: 2.54 on the average at primary beam energy of 7 keV, 2.75 at 10 keV, 10.03 at 30 keV. The non-standard behavior of secondary electron emission coefficient at the high energy primary beam for all orientations of single crystal diamond is shown: increase in secondary electron emission coefficient with increase in energy of primary beam. At the moment the reason of such behavior is not clear up to the end and since this fact causes a great interest of researchers, considerably expands applicability of the existing devices and detectors due to replacement of a functional element on diamond one, and also opens big opportunities for formation of new field of microelectronics, this facts demand further in-depth study by means of various methods of the structural and surface analysis.

Secondary electron emission coefficient of metal doping W-base alloy cathode

2014 ◽  
Vol 26 (12) ◽  
pp. 123006
Author(s):  
漆世锴 Qi Shikai ◽  
王小霞 Wang Xiaoxia ◽  
罗积润 Luo Jirun ◽  
赵世柯 Zhao Shike ◽  
李云 Li Yun ◽  
...  
Keyword(s):  
Electron Emission ◽  
Secondary Electron ◽  
Base Alloy ◽  
Secondary Electron Emission ◽  
Emission Coefficient ◽  
Metal Doping ◽  
Secondary Electron Emission Coefficient

Preparation of MgO and mechanism analysis of secondary electron emission coefficient

2017 ◽  
Vol 32 (6) ◽  
pp. 467-473
Author(s):  
韦海成 WEI Hai-cheng ◽  
许亚杰 XU Ya-jie ◽  
肖明霞 XIAO Ming-xia ◽  
吉文欣 JI Wen-xin
Keyword(s):  
Electron Emission ◽  
Secondary Electron ◽  
Secondary Electron Emission ◽  
Mechanism Analysis ◽  
Emission Coefficient ◽  
Secondary Electron Emission Coefficient

Taming NO oxidation efficiency by γ-MnO2 morphology regulation

2020 ◽  
Vol 10 (17) ◽  
pp. 5996-6005
Author(s):  
Lei Chen ◽  
Jinping Zhang ◽  
Yuxin Li ◽  
Xiaomei Wu ◽  
Zaoxiao Zhang ◽  
...  
Keyword(s):  
Nitric Oxide ◽  
Fossil Fuels ◽  
No Oxidation ◽  
Global Concern ◽  
Oxidation Efficiency ◽  
Oxidation Of No

Nitric oxide (NO) emitted from the combustion of fossil fuels has drawn global concern, and the oxidation of NO contributes greatly to the DeNOx process.

scholarly journals Removal of several pesticides in a falling water film DBD reactor with activated carbon textile: Energy efficiency

2017 ◽  
Vol 116 ◽  
pp. 1-12 ◽  
Author(s):  
Patrick Vanraes ◽  
Houria Ghodbane ◽  
Dries Davister ◽  
Niels Wardenier ◽  
Anton Nikiforov ◽  
...  
Keyword(s):  
Energy Efficiency ◽  
Activated Carbon ◽  
Water Film ◽  
Dbd Reactor
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