Reduction of NO x /SO2 by Wire-plate Type Pulsed Discharge Reactor with Pulsed Corona Radical Shower

Shang, Kefeng; Wu, Yan; Li, Jie; Li, Guofeng; Duan, Li; Wang, Ninghui

doi:10.1007/s11090-006-9026-2

Cited by 17 publications

(4 citation statements)

References 26 publications

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“…Among preoxidation technologies under development, advanced oxidation processes (AOPs) are receiving great emphasis on pollution control because of their ability to rapidly oxidize hazardous air pollutants [7,8]. Among the AOPs, non-thermal discharge plasmas (NTPs), which generate a large number of chemical active species such as ÁO and O 3 , have been developed as a new method applicable for processing waste gas [9,10], the removal of volatile organic compounds (VOCs) [11,12] and oxidizing Hg 0 [13][14][15][16][17]. NTP processes are highly effective in producing free radicals to enhance the removal of hazardous air pollutants.…”

Section: Introductionmentioning

confidence: 99%

Oxidation of Elemental Mercury by Active Species Generated From a Surface Dielectric Barrier Discharge Plasma Reactor

Shang

Lü

et al. 2013

Plasma Chem Plasma Process

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A surface dielectric barrier discharge plasma reactor was employed to study Hg 0 oxidation in coal-fired flue gas. The experimental results showed that 98 % of Hg 0 oxidation efficiency and 13.7 lg kJ -1 of energy yield were obtained under a specific energy density (SED) of 7.9 J L -1 . Increasing SED was beneficial for Hg 0 oxidation due to higher production of active species. Higher initial concentration resulted in lower Hg 0 oxidation efficiency, but higher amount of Hg 0 oxidation. Water vapor inhibited Hg 0 oxidation because the generation of O 3 was suppressed. The presence of NO remarkably restrained Hg 0 oxidation, while SO 2 showed little effect on Hg 0 oxidation. Roles of active species in Hg 0 oxidation were examined under different gas atmospheres (O 2 and air), indicating that O 3 played an important role in Hg 0 oxidation. Deposits on the internal surface of the reactor were analyzed by energy dispersive spectroscopy and the product was identified as HgO.

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Section: Introductionmentioning

confidence: 99%

Oxidation of Elemental Mercury by Active Species Generated From a Surface Dielectric Barrier Discharge Plasma Reactor

Shang

Lü

et al. 2013

Plasma Chem Plasma Process

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“…Nonthermal plasma (NTP) technologies were first developed and applied to ozone generation 1 and later have been successfully applied to remove varieties of gaseous pollutants, such as NO x , SO x , mercury, volatile organic carbons (VOCs), , dioxins, , and perfluoro compounds (PFCs). − In addition, nonthermal plasma has the potential to simultaneously remove multiple pollutants from gas streams at low temperature, , which is quite different from conventional air pollution control technologies, such as combustion and catalytic oxidation in which high-temperature operation is required. In NTP, the electrons, due to the tiny mass, acquire much higher energy than other charged species.…”

Section: Introductionmentioning

confidence: 99%

Review of Packed-Bed Plasma Reactor for Ozone Generation and Air Pollution Control

Chen

Lee

Chen

et al. 2008

Ind. Eng. Chem. Res.

173

109

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Packed-bed plasma reactors, constructed by packing noncatalytic dielectric pellets inside nonthermal plasma reactors, have been demonstrated to effectively alleviate the major bottleneck encountered by nonthermal plasma, i.e., the energy efficiency needs to be further improved. As far as the environmental issues are concerned, packed-bed plasma reactors are mainly applied to ozone generation and gaseous pollutant removal. According to the available experimental data, for a given specific energy density, the energy efficiency for ozone generation and gaseous pollutant abatement obtained with packed-bed reactors, if compared to that of nonpacked reactors, could be 1.1-4.3 and 1.1-12 times higher, depending on the type of pollutant, the reactor geometry, and the packing pellets used. Nevertheless, it is worth noticing that the packing pellets suitable for ozone generation and pollutant removal are quite different. The influences of material, dielectric constant, size, and shape of the packing pellets on the performance for ozone generation and gaseous pollutant removal are comprehensively reviewed in this paper and guidelines for pellet selection are provided as well. For the single-stage plasma catalysis system, in which catalyst pellets are directly packed inside the plasma reactor, the physical parameters of catalyst would also have significant influence on the plasma characteristics and the performance. Therefore, the content of this review paper could provide useful information for singlestage plasma catalysis system from the viewpoint of plasma characteristics.

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“…Non-thermal plasmas have been used to purify flue gas containing SO 2 /NO x [6][7][8]. During the process of plasma generation, strong oxidative species such as O, •OH, O 3 , etc are produced, which are responsible for oxidation of SO 2 /NO x [9].…”

Section: Introductionmentioning

confidence: 99%

Oxidative Removal of Elemental Mercury in Flue Gas by DBD Discharge Plasma

Jiang

Shang

et al. 2012

AMR

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Oxidation of gas phase elemental mercury (Hg0) in the simulated flue gas by DBD plasma under atmospheric pressure and ambient temperature (298 K) was conducted. Experimental results indicated that the oxidative efficiency of Hg0 increased with O2 content, the residence time of flue gas in reactor and the applied voltage. The oxidation efficiency of Hg0 reached over 96% under the applied voltage of 11 kV and the residence time of 0.24 s when the O2 content in flue gas was 20%, and the corresponding energy efficiency was at about 14.1 μg kJ-1. It was noted that the oxidation efficiency of Hg0 could still reach 80% when the O2 content in flue gas was only 4% (near the actual O2 content in flue gas of coal-fired boilers). The experimental results indicated that DBD plasma was one of the efficient technologies for purification of Hg0 vapor industrial flue gas.

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Reduction of NO x /SO2 by Wire-plate Type Pulsed Discharge Reactor with Pulsed Corona Radical Shower

Cited by 17 publications

References 26 publications

Oxidation of Elemental Mercury by Active Species Generated From a Surface Dielectric Barrier Discharge Plasma Reactor

Oxidation of Elemental Mercury by Active Species Generated From a Surface Dielectric Barrier Discharge Plasma Reactor

Review of Packed-Bed Plasma Reactor for Ozone Generation and Air Pollution Control

Oxidative Removal of Elemental Mercury in Flue Gas by DBD Discharge Plasma

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