Electric discharge removal of SO2 and NOx from combustion flue gas by pulsed corona discharge

Onda, Kazuo; Kasuga, Yasuhiro; Kato, Ken; Fujiwara, Masanori; Tanimoto, Mitsumori

doi:10.1016/s0196-8904(96)00167-7

Cited by 43 publications

(20 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, theoretical and experimental investigations of pulsed corona discharge reactors have shown that an intensified corona discharge leads to a higher SO 2 conversion rate (Onda et al, 1997;Mok & Nam, 2002;Xu et al, 2009;Yu et al, 2009). As the operating voltage is increased the rising production of SO 3 creates supersaturation inside the WESP.…”

Section: Influence Of the Operating Voltagementioning

confidence: 99%

“…1978) and 1980s (Mizuno et al, 1986) respectively. A potential application for this is the combined dry DeNO x and DeSO x process (Jordan et al, 1986;Onda et al, 1997;Xu et al, 2009;Yu et al, 2009). Through reaction with alkaline materials such as NH 3 , sulfuric and nitric acid are neutralized forming solid aerosol particles that can be collected from the flue gas.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Collection and Generation of Sulfuric Acid Aerosols in a Wet Electrostatic Precipitator

Anderlohr

Brachert

Mertens³

et al. 2015

Aerosol Science and Technology

View full text Add to dashboard Cite

Wet Electrostatic Precipitators (WESPs) are considered to be a possible technology for the control of sulfuric acid mist. The performance of a lab-scale WESP was investigated as a precipitator for sulfuric acid aerosol droplets produced under controlled conditions in a pilot plant. It was found that for higher levels of residual SO 2 in the flue gas, WESP collection efficiencies were greatly reduced due to aerosol formation inside the WESP. Investigations showed a strong correlation of aerosol emission from the WESP with incoming SO 2 concentration and operating voltage. It is suspected that the reactive species produced in the nonthermal plasma of the corona discharge oxidize the SO 2 to SO 3 which forms sulfuric acid. This causes supersaturation with subsequent homogeneous nucleation and thus aerosol formation.

show abstract

Section: Influence Of the Operating Voltagementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Collection and Generation of Sulfuric Acid Aerosols in a Wet Electrostatic Precipitator

Anderlohr

Brachert

Mertens³

et al. 2015

Aerosol Science and Technology

View full text Add to dashboard Cite

show abstract

“…The pH-value is further reduced by absorption of SO 3 and NO 2 , forming sulfuric and nitric acid, respectively. It has been shown that SO 2 and NO x can be oxidized by active species generated in the nonthermal plasma of the corona discharge (Onda et al 1997;Anderlohr et al 2015). While the oxidation and absorption of SO 2 has only a small influence due to the low sulfur content of the fuel gas, NO x is inevitably produced in the combustion.…”

Section: Suspension Stabilitymentioning

confidence: 99%

Direct Transfer of Gas-Borne Nanoparticles into Liquid Suspensions by Means of a Wet Electrostatic Precipitator

Anderlohr

Schaber

2015

Aerosol Science and Technology

View full text Add to dashboard Cite

The direct transfer of flame-synthesized aerosols of silica nanoparticles into aqueous suspensions is investigated. Silica nanoparticle aerosols with production rates of 0.5 g/h and different mean diameters and degrees of agglomeration are transferred into liquid suspensions by means of a novel wet electrostatic precipitator. Particle collection efficiencies above 99.999% were measured. The influence of the transfer on the particle size distribution was investigated by comparison of aerosol and suspensions size measurements. Aerosol sizes were measured with the scanning mobility particle sizer (SMPS), and suspension size measurements were conducted by dynamic light scattering (DLS) and by SMPS measurements of the aerosolized suspension employing a novel nebulizer. Depending on the aerosol and stabilization conditions, particle transfer with nearly no influence on the particle size distribution is possible. Suspensions generated from the same particle aerosol by direct transfer and by sonication of the respective powder were compared. In contrast to the direct transfer, the aerosol particle size distribution could not be restored by ultrasonication.

show abstract

“…In the past two decades, techniques for simultaneous removal of SO 2 and NO have attracted wide attention because of the advantages of a simple device and small space, mainly including non‐thermal plasma, catalytic oxidation and the advanced oxidation wet scrubber . Among these, the oxidation method is one of the most promising processes to realize the simultaneous removal of SO 2 and NO .…”

Section: Introductionmentioning

confidence: 99%

Effects of experimental parameters on simultaneous removal of SO₂ and NO by VUV/H₂O₂ advanced oxidation process in a pilot‐scale photochemical spraying tower

Xie

Zhang

et al. 2018

J of Chemical Tech & Biotech

View full text Add to dashboard Cite

BACKGROUND: Emissions of SO 2 and NO from flue gas have caused serious environmental pollution issues. UV/vacuum ultraviolet(VUV)-activated H 2 O 2 advanced oxidation technology is one of the most promising processes to realize the simultaneous removal of SO 2 and NO. From the application perspective, it is necessary to carry out further research in a pilot-scale photochemical reactor with industrial conditions and actual coal-fired flue gas running conditions. RESULTS: Results showed that SO 2 removal efficiency can reach 100% under most experimental conditions. An increase of the VUV irradiation intensity, H 2 O 2 concentration and solution pH can promote NO removal, but the growth rate of that gradually slows down. It is not conducive to NO removal when the flue gas flow and NO concentration increases. Increasing liquid-gas ratio has dual effects on NO removal; NO removal efficiency increases at first, and then decreases sharply. SO 2 concentration has no great impact on removal of NO. Results of ion chromatography (IC) demonstrate that SO 4 2− and NO 3 − are the major removal products of SO 2 and NO. CONCLUSION: The VUV-activated H 2 O 2 advanced oxidation technology is suitable for industrial application. The investment and operating costs of this technology are lower than those of the combined processes NH 3 -SCR and Ca-WFGD.

show abstract

Electric discharge removal of SO2 and NOx from combustion flue gas by pulsed corona discharge

Cited by 43 publications

References 13 publications

Collection and Generation of Sulfuric Acid Aerosols in a Wet Electrostatic Precipitator

Collection and Generation of Sulfuric Acid Aerosols in a Wet Electrostatic Precipitator

Direct Transfer of Gas-Borne Nanoparticles into Liquid Suspensions by Means of a Wet Electrostatic Precipitator

Effects of experimental parameters on simultaneous removal of SO₂ and NO by VUV/H₂O₂ advanced oxidation process in a pilot‐scale photochemical spraying tower

Contact Info

Product

Resources

About

Electric discharge removal of SO2 and NOx from combustion flue gas by pulsed corona discharge

Cited by 43 publications

References 13 publications

Collection and Generation of Sulfuric Acid Aerosols in a Wet Electrostatic Precipitator

Collection and Generation of Sulfuric Acid Aerosols in a Wet Electrostatic Precipitator

Direct Transfer of Gas-Borne Nanoparticles into Liquid Suspensions by Means of a Wet Electrostatic Precipitator

Effects of experimental parameters on simultaneous removal of SO2 and NO by VUV/H2O2 advanced oxidation process in a pilot‐scale photochemical spraying tower

Contact Info

Product

Resources

About

Effects of experimental parameters on simultaneous removal of SO₂ and NO by VUV/H₂O₂ advanced oxidation process in a pilot‐scale photochemical spraying tower