Research progress on elemental mercury (Hg0) removal in flue gas using non-thermal plasma technology

被引:3
作者
Cun, Meng [1 ]
Wang, Kaiyue [1 ]
Yin, Zhibin [1 ]
Guo, Jianbo [1 ]
Wang, Tongzhe [1 ]
Yang, Shitong [1 ]
Liu, Guiying [1 ]
Zhang, Yitao [1 ]
Feng, Qinzhong [1 ]
Liu, Liyuan [1 ]
Chen, Yang [1 ,2 ]
机构
[1] Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China
[2] Binzhou Inst Technol, Weiqiao UCAS Sci & Technol Pk, Binzhou 256606, Shandong, Peoples R China
关键词
Flue gas pollution control; Corona discharge (CD); Dielectric barrier discharge (DBD); Non-thermal plasma (NTP); Elemental mercury (Hg 0 ) removal; DIELECTRIC BARRIER DISCHARGE; CE MIXED OXIDES; COAL COMBUSTION; POLLUTION-CONTROL; CORONA DISCHARGE; GASEOUS MERCURY; ELECTRON-BEAM; OXIDATION; PERFORMANCE; INJECTION;
D O I
10.1016/j.envpol.2024.124806
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Elemental mercury (Hg0) 0 ) removal is a crucial target for mercury pollution control in flue gas. This article focuses on Hg0 0 removal in flue gas using corona discharge (CD) and dielectric barrier discharge (DBD) technologies, and provides a mechanistic perspective on the development and influencing factors of non-thermal plasma (NTP) technology for Hg0 0 removal. The influence factors include reactor configurations, power supplies, energy density, residence time, oxidation methods, gas composition, and the synergy between NTP and catalysis/adsorption, etc. This study reveals that the use of a pulsating electrical power supply significantly increases electron densities in both CD and DBD systems, thereby ensuring high energy efficiency and economic viability. Cl2 2 proves to be more effective than HCl as a chlorine source for Hg0 0 removal. NO significantly reduces Hg0 0 oxidation efficiency, while the effects of SO2 2 and H2O 2 O remain unclear. Energy density distribution is closely related to plasma devices, power supplies, and overall reactor configurations. Direct oxidation proves to be more effective than indirect oxidation for Hg0 0 removal. The combination of NTP with adsorption/catalysis technologies shows significantly better Hg0 0 removal efficiency compared to using NTP alone. This study can provide theoretical support for enhancing Hg0 0 removal mechanisms and optimizing process control parameters in industrial applications of NTP technology.
引用
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页数:14
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