Experimental analysis on the capture of submicron particles (PM0.5) by wet electrostatic scrubbing

D’Addio, Luca; Carotenuto, Claudia; Balachandran, W.; Lancia, A.; Natale, F. Di

doi:10.1016/j.ces.2013.11.044

Cited by 40 publications

(26 citation statements)

References 31 publications

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“…Conversely, tests performed on fine or ultrafine particles showed a steep increase of the removal efficiency. In previous studies [1,[19][20][21], our research group proved that, when submicron particles are scrubbed by uncharged droplets, negligible (< 1%) removal efficiencies were obtained. Otherwise, when the system operated as a wet electrostatic scrubber, the removal efficiency was at least one order of magnitude higher.…”

Section: Water Electrified Sprays For Emission Control In Energy Prodmentioning

confidence: 99%

“…Tests at lab scale were performed to estimate the SO2 absorption rate in charged and uncharged droplets of controlled size, shape and velocity, following the indication reported in Di Natale et al [4]. Experiments on particle removal in the same unit are reported in D'Addio et al [19,20] and Di Natale et al [21].…”

Section: Water Electrified Sprays For Emission Control In Energy Prodmentioning

confidence: 99%

“…230-20R). The needle tip was located 1 mm below the lower surface of the ring [20]. The liquid was fed into the needle using a syringe pump.…”

Section: Figure 1 Layout Of the Laboratory Scale Systemmentioning

confidence: 99%

“…The main components of the plant are the water electrostatic scrubber (WES), which included the charged droplet generation system and the gas-charging unit (GCU), described in D'Addio et al [19][20]. The gas analysis instrumentation, which consisted in an ACD MAG3000C equipped with a chiller and a dryer to avoid interferences in the SO2 determination.…”

Section: Figure 1 Layout Of the Laboratory Scale Systemmentioning

confidence: 99%

“…Wet electrostatic scrubbing (WES) can be an effective alternative process to remove submicron particles from gas stream in a market segment where ESP and FF are less effective [17][18][19][20][21]. Wet electrostatic scrubber is a spray tower equipped with an electrified spray unit for electrically charged water droplets generation and, optionally, a particle pre-charging unit.…”

Section: Water Electrified Sprays For Emission Control In Energy Prodmentioning

confidence: 99%

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Water Electrified Sprays for Emission Control in Energy Production Processes

F.¹,

Carotenuto²,

Manna³

et al. 2016

IJHT

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Energy generation by fossil fuels produces significant amount of pollutants. Among the most toxic of them, there are SO2 and particulate matter. The first is a toxic gas that is subjected to severe regulations, the second is only partially regulated since the most toxic fractions of particles, i.e. the ultrafine particles, are nor easily measured neither properly captured by conventional technologies available at commercial level. Electrification of water sprays provide a reliable way to improve both the SO2 mass transfer rates and the particle capture efficiency, thanks to the multiple effects of electric charges imposed on the sprayed droplets. In this paper, we report experimental findings on the use of electrified sprays of water to reduce SO2 and particulate matter form a model flue gas. Tests were performed both laboratory and pilot scale. The experiments are compared with the performances of the same spray operated without electrification. In the pilot scale unit, particle removal efficiency is negligible and SO2 removal is up to 97% with the uncharged spray, The use of induction charging and exposure to corona pre-charging allow achieving >93% reduction of particulate matter and to >99% SO2 reductions. Experiments at laboratory scale shed light on the mechanisms of particle and SO2 capture. In particular, the experimental results revealed that a stochastic scavenging model presented in our former works (data not shown) well described the particle capture and that for charged droplets, the absorption rate for SO2 improved by about 60% respect to uncharged droplets.

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Section: Water Electrified Sprays For Emission Control In Energy Prodmentioning

confidence: 99%

Section: Water Electrified Sprays For Emission Control In Energy Prodmentioning

confidence: 99%

“…230-20R). The needle tip was located 1 mm below the lower surface of the ring [20]. The liquid was fed into the needle using a syringe pump.…”

Section: Figure 1 Layout Of the Laboratory Scale Systemmentioning

confidence: 99%

Section: Figure 1 Layout Of the Laboratory Scale Systemmentioning

confidence: 99%

Section: Water Electrified Sprays For Emission Control In Energy Prodmentioning

confidence: 99%

See 3 more Smart Citations

Water Electrified Sprays for Emission Control in Energy Production Processes

F.¹,

Carotenuto²,

Manna³

et al. 2016

IJHT

View full text Add to dashboard Cite

show abstract

Numerical Investigation of the Capture of Polydisperse Particles by Charged Droplets

Zuo

Wang

et al. 2021

Chem Eng & Technol

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The capture of particles by charged droplets was simulated by considering the electrostatic interactions of droplet-droplet and droplet-particle. The results indicate that the electrostatic repulsion between droplets leads to a dynamic accumulation mode of particles. However, the droplet spacing has an insignificant effect on the capture efficiency when the electrostatic deposition predominates. The increase of droplet charge remarkably improves the capture efficiency, in which the capture of fine particles accounts for the largest proportion. Compared to the droplet charge, the droplet size shows a limited improvement in the capture efficiency. Reducing the droplet velocity prolongs the capture time instead of enhancing the capture capacity per unit time, thereby improving capture efficiency.

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Absorption of sulphur dioxide by electrosprayed droplets

et al. 2020

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This paper describes and discusses experimental results on the absorption of sulphur dioxide in electrified water sprays, either when the polluted gas is treated as is or when the gas is exposed to a corona source to ionize the sulphur dioxide. The experiments revealed that an electrified spray with a charge‐to‐mass ratio of 50 μC · kg−1 enabled the absorption rate of droplets to double, regardless of their polarities. Corona charging gave rise to an increase in the SO2 depletion rate over the scrubber wall, while negligible effects appeared on the actual droplets absorption rate. These findings suggested that faster absorption rates mostly, though not uniquely, depend on the modifications on the morphological and interfacial properties of the sprayed droplets induced by the free electric charge imposed on their surface. Conversely, the absorption rates were negligibly affected by the electrical interactions between droplets (either charged or uncharged) and the sulphur dioxide ions/radicals originating from the corona source.

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Experimental analysis on the capture of submicron particles (PM0.5) by wet electrostatic scrubbing

Cited by 40 publications

References 31 publications

Water Electrified Sprays for Emission Control in Energy Production Processes

Water Electrified Sprays for Emission Control in Energy Production Processes

Numerical Investigation of the Capture of Polydisperse Particles by Charged Droplets

Absorption of sulphur dioxide by electrosprayed droplets

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