Electrostatic Charging and Precipitation of Diesel Soot

Hayashi, Hideaki; Takasaki, Yasuhiro; Kawahara, Kazuki; Takashima, Kazunori; Mizuno, Akira

doi:10.1109/tia.2010.2090846

Cited by 11 publications

(3 citation statements)

References 6 publications

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“…Electrostatic precipitation technique for the removal of PM from diesel exhausts was tested by Chan et al [13], using commercial ESP. Hybrid systems, comprised of an ESP and DPF were tested by Hayashi et al [14], metal foam filter by Kim et al [15], wet ESP by Saiyasitpanich et al [16], simple tubular electrostatic filter with corona discharge by Thonglek [17], or without initiation of corona discharge by Kittelson [18].…”

Section: Fig 3 Vertical Type Of Electroscrubber With Counter-currenmentioning

confidence: 99%

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Particulate Matter Emission Reduction from Marine Diesel Engines by Electrohydrodynamic Methods

et al. 2019

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Particulate matter (PM) and gaseous compounds (SO2, NOx, VOC) emitted by diesel engines causes serious global environmental problems and health impact. Despite numerous evidences about the harmfulness of diesel particles, the PM emission by diesel engines used by ships, cars, agricultural machines, or power generators is still unregulated, and the efficient removal of PM from diesel exhausts is still the major technological challenge. In order to comply with the International Maritime Organization regulation, the NOx emission is reduced by using selected catalytic reactor, and sulphur oxide emission has been reduced by using fuels of low sulphur content. However, both of those measures cannot be used for the reduction of PM emission produced during combustion of marine fuels. The lack of appropriate regulations results from insufficiently developed technology, which could remove those particles from exhaust gases. Conventional scrubbers currently available on the market remove only sulphur oxide with required collection efficiency, but the collection efficiency for PM2.5 is below 50%. The article discusses the technical means used for the removal of PM from marine diesel engines via applying electrohydrodynamic methods, in particular electrostatic agglomeration, as a method of nanoparticles coagulation to larger agglomerates, which could operate in two-stage electrostatic precipitation systems, and electrostatic scrubbers, which remove particles by electrically charged water droplets. The experimental results were obtained for a 2-stroke 73 kW diesel engine fuelled with marine gas oil (MGO). The agglomerator allowed increasing the collection efficiency from diesel exhausts for PM2.5 particles by about 12%, compared to electrostatic precipitator operating without agglomerator, and the total mass collection efficiency was above 74%. The collection efficiency of electrostatic scrubber was higher than 95wt.%. The advantage of using the electrostatic scrubber is that it can also reduce the SO2 emission by more than 90%, when HFO is used.

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Section: Fig 3 Vertical Type Of Electroscrubber With Counter-currenmentioning

confidence: 99%

“…Hayashi et al [14] achieved better collection efficiency using combination of ESP and DPF. Their hybrid system improved the precipitation of PM, compared to a DPF operating alone.…”

Section: Fig 3 Vertical Type Of Electroscrubber With Counter-currenmentioning

confidence: 99%

Particulate Matter Emission Reduction from Marine Diesel Engines by Electrohydrodynamic Methods

et al. 2019

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“…Kuroki et al [7] reported the removal performance of nanoparticles (polystyrene latex) in a wet-type discharge plasma reactor, and showed a high collection efficiency greater than 99%. Mizuno et al [8,9] investigated the effects of gas temperature and the addition of a DPF on collecting diesel nanoparticles in an ESP. Kim et al [10][11][12] investigated the submicron particulate matter (PM) removal of an ESP, combined with a metallic filter for diesel engines and the nanoparticle of a novel two-stage type ESP, using KCl particles.…”

Section: Introductionmentioning

confidence: 99%

Collection Characteristic of Nanoparticles Emitted from a Diesel Engine with Residual Fuel Oil and Light Fuel Oil in an Electrostatic Precipitator

2019

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The purpose of this study was to investigate the collection characteristics of nanoparticles emitted from a diesel engine in an electrostatic precipitator (ESP). The experimental system consisted of a diesel engine (400 cc) and an ESP; residual fuel oil and light fuel oil were used for the engine. Although, the peak value of distribution decreased as the applied voltage increased due to the electrostatic precipitation effect, the particle concentration, at a size of approximately 20 nm, increased compared with that at 0 kV, in the exhaust gas, from the diesel engine with residual fuel oil. However, the efficiency increased by optimizing the applied voltage, and the total collection efficiency in the exhaust gas, using the residual fuel oil, was 91%. On the other hand, the particle concentration, for particle diameters smaller than 20 nm, did not increase in the exhaust gas from the engine with light fuel oil.

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