Mercury and other trace elements removal characteristics of DC and pulse energized electrostatic precipitator

Liang, Xinghua; Looy, P.C.; Jayaram, S.; Berezin, Alexander A.; Mozes, M. S.; Chang, Jen‐Shih

doi:10.1109/ias.1998.729857

Cited by 5 publications

(5 citation statements)

References 17 publications

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“…Dielectric barrier discharge (DBD), a type of AC corona discharge, has been well studied as a Hg 0 oxidation technique (Chen et al, 2006;Jeong and Jurng, 2007;Byun et al, 2008Byun et al, , 2011aByun et al, , 2011bKo et al, 2008c;Lin et al, 2010;Wang et al, 2010;Jiang et al, 2012). Similarly, DC corona discharge (Liang et al, 2002;Wang et al, 2009Wang et al, , 2011aWang et al, , 2013a and pulsed corona discharge (Liang et al, 1998;Ko et al, 2008aKo et al, , 2008bXu et al, 2009) have also been used to oxidize Hg 0 . Notably, corona discharge has additional beneficial effects other than Hg 0 oxidation.…”

Section: Introductionmentioning

confidence: 99%

“…DBD, pulsed corona discharge, and the system based on DC corona discharge by Wang et al (2013a) can also oxidize nitrogen oxides (NO x ) and sulfur oxides (SO x ). The coronabased ESP developed by Liang et al (2002) (Xie et al, 2002;Wang et al, 2008;Hu et al, 2009;Yang et al, 2013). However, the Hg 0 oxidation in such processes was attributed to oxidizing compounds in the flue gas, such as hydrogen chloride (HCl).…”

Section: Introductionmentioning

confidence: 99%

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Elemental mercury oxidation in an electrostatic precipitator enhanced with in situ soft X-ray irradiation

Wang

et al. 2014

Journal of the Air & Waste Management Association

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Corona discharge based techniques are promising approaches for oxidizing elemental mercury (Hg 0 ) in flue gas from coal combustion. In this study, in-situ soft X-rays were coupled to a DC (direct current) corona-based electrostatic precipitator (ESP). The soft X-rays significantly enhanced Hg 0 oxidation, due to generation of electrons from photoionization of gas molecules and the ESP electrodes. This coupling technique worked better in the positive corona discharge mode because more electrons were in the high energy region near the electrode. Detailed mechanisms of Hg 0 oxidation are proposed and discussed based on ozone generation measurements and Hg 0 oxidation behavior observations in single gas environments (O 2 , N 2 , and CO 2 ). The effect of O 2 concentration in flue gas, as well as the effects of particles (SiO 2 , TiO 2 , and KI) was also evaluated. In addition, the performance of a soft X-rays coupled ESP in Hg 0 oxidations was investigated in a lab-scale coal combustion system. With the ESP voltage at +10 kV, soft X-ray enhancement, and KI addition, mercury oxidation was maximized.Implications: Mercury is a significant-impact atmospheric pollutant due to its toxicity. Coal-fired power plants are the primary emission sources of anthropogenic releases of mercury; hence, mercury emission control from coal-fired power plant is important. This study provides an alternative mercury control technology for coal-fired power plants. The proposed electrostatic precipitator with in situ soft X-rays has high efficiency on elemental mercury conversion. Effects of flue gas conditions (gas compositions, particles, etc.) on performance of this technology were also evaluated, which provided guidance on the application of the technology for coal-fired power plant mercury control.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Elemental mercury oxidation in an electrostatic precipitator enhanced with in situ soft X-ray irradiation

Wang

et al. 2014

Journal of the Air & Waste Management Association

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“…These reactive species and UV can oxidize Hg 0 at a high reaction rate. These species have also been recognized for potentially oxidizing NO and SO 2 from flue gas (Liang et al, 2002;Jeong and Jurng 2007;Xu et al, 2009), destructing carbonyl sulfide (Tsai et al, 2007), and removing organic compounds (Chang and Hsieh 2013;Lin et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Improving the Removal Efficiency of Elemental Mercury by Pre-Existing Aerosol Particles in Double Dielectric Barrier Discharge Treatments

Jiang

Duan

et al. 2015

Aerosol Air Qual. Res.

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Plasma technology has been employed for the removal of gaseous elemental mercury (Hg 0 ) from simulated flue gases without pre-existing airborne particles. This study developed a double dielectric barrier discharge (DDBD) treatment system, in which two coaxial electrodes were covered by quartz dielectrics, for removing mercury with the presence of aerosol particles. The increase in pre-existing aerosol surface concentration can improve Hg 0 removal efficiency up to 160% in the DDBD device. Inorganic aerosol particles (sodium chloride) perform better than organic ones (sucrose) in improving Hg 0 removal efficiency. These aerosol particles can be collected in the DDBD system. For sodium chloride particles, a collection efficiency of more than 90% was observed in the tested diameter range of 10-100 nm. The improvement in Hg 0 removal with the presence of particles is possibly due to that (i) aerosol particles provide additional surface for surface-induced Hg 0 oxidations, (ii) reactive species (such as Cl) generated by plasma etching particle surface rapidly react with Hg 0 , and (iii) charged particles can in-flight adsorb mercury species.

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“…In addition, several modified ESPs were also developed and reported in literature, such as electrostatic flocking (Sung et al, 2006), wet electrostatic precipitators (Saiyasitpanich et al, 2006), dielectric barrier discharge (Byeon et al, 2006), plasma enhanced precipitator (Montgomery et al, 2005), soft X-ray-enhanced corona systems (Kulkarni et al, 2002;Hogan et al, 2004;Jiang et al, 2007), simultaneous diffusional-electrostatic precipitation (Alonso et al, 2002), and pulse-energized electrostatic precipitation (Dinelli et al, 1991;Jayaram et al, 1996;Mok et al, 1999;Zukeran et al, 1999a;Liang et al, 2002a;2002b). Among the above methods, the pulse-energized ESPs may be considered as a retrofit option.…”

Section: Introductionmentioning

confidence: 99%

“…These pulse-energized ESPs were used mainly for fly ash (Dinelli et al, 1991;Jayaram et al, 1996) and mercury (Liang et al, 2002a) removal as well as SO 2 and NO x emission control from industrial flue gases (Mok et al, 1999). The fly ash particles studied, nevertheless, were very large, i.e.…”

Section: Introductionmentioning

confidence: 99%

Capture of Particles from an Iron and Steel Smelter with a Pulse-Energized Electrostatic Precipitator

Grigoriu

Wang

Martín

et al. 2012

Aerosol Air Qual. Res.

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A bench-scale pulse-energized electrostatic precipitator (ESP) was developed to study the capture of particles from exhaust gas streams from iron and steel factories. The morpho-structural characteristics, composition and size distribution of the particles were analyzed. The results showed that the particles consisted primarily of iron oxides and other compounds containing Ca, S, C, Si, Al, and Na elements. The particles had a broad size distribution ranging from 5 nm to several micrometers. The V-I characteristics of the ESP were studied with biased DC voltages of ± 10 kV and ± 10 kV with superimposed pulses (± 5.5 kV, rise time 60 ns, repetition rate 50 pps). The capture efficiency was investigated by means of a low pressure impactor and scanning mobility particle sizer. In the range of 155 to 6,650 nm, the ESP number-based capture efficiencies were > 99.6% and > 98.9% for negative and positive voltages, respectively. For sizes less than 50 nm, the negative pulsed mode was remarkably efficient (93.7 to 99.4%).

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Mercury and other trace elements removal characteristics of DC and pulse energized electrostatic precipitator

Cited by 5 publications

References 17 publications

Elemental mercury oxidation in an electrostatic precipitator enhanced with in situ soft X-ray irradiation

Elemental mercury oxidation in an electrostatic precipitator enhanced with in situ soft X-ray irradiation

Improving the Removal Efficiency of Elemental Mercury by Pre-Existing Aerosol Particles in Double Dielectric Barrier Discharge Treatments

Capture of Particles from an Iron and Steel Smelter with a Pulse-Energized Electrostatic Precipitator

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