A semi-wet technological process for flue gas desulfurization by corona discharges at an industrial scale

Yan, Keping; Li, Ruinian; Zhu, Tianle; Zhang, Hong-Di; Hu, Xiaotu; Jiang, Xinyu; Liang, Hui; Qiu, Ruichang; Wang, Yi

doi:10.1016/j.cej.2005.09.030

Cited by 32 publications

(13 citation statements)

References 18 publications

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“…An obvious choice to make is: to which application do we apply our nanosecond pulse technology? Some of the classical air-purification processes are the production of ozone [21,22,23,8,24] and the removal/conversion of nitrogen oxides (NO x ) [25,26,21,27,28,29,16,30], sulfur oxides (SO x ) [27,31,32,33], volatile organic compounds (VOCs) [34,35,36,37], tar [6,38], odour [39,40,41], particulate matter (PM) [27,41] and biological particles [41,42,43,44,45].…”

Section: Plasma Processesmentioning

confidence: 99%

(Sub)nanosecond transient plasma for atmospheric plasma processing experiments: application to ozone generation and NO removal

Huiskamp¹,

Hoeben²,

Beckers³

et al. 2017

J. Phys. D: Appl. Phys.

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Section: Plasma Processesmentioning

confidence: 99%

(Sub)nanosecond transient plasma for atmospheric plasma processing experiments: application to ozone generation and NO removal

Huiskamp¹,

Hoeben²,

Beckers³

et al. 2017

J. Phys. D: Appl. Phys.

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“…In nitrogen gas, the corona charging may produce SO 2 + ions, with minoritarian fractions SO + and S + [27] or SO 2 − radicals. [28] The formation of S(VI) species, as SO 3 or H 2 SO 4 , [29] can be neglected. Figure 6 shows the ratio between the SO 2 scavenging coefficient when the corona charger was either switched on or off, Λ we /Λ w , as a function of the applied potential.…”

Section: Tests With Charged Droplets and Corona Pre-chargingmentioning

confidence: 99%

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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“…These reactive radicals react with and decompose pollutants to yield decomposition products (Hyun-Ha et al, 2004).There are several techniques to generate nonthermal plasmas (NTP), such as pulsed corona discharge, dielectric barrier discharge, and electron beam. There are many researchers that had investigated the effect of DeSO 2 and De-NO X by pulsed corona discharge (Cgakrabarti et al, 1995;Youhei et al, 2001;Dong et al, 2002;Wei et al, 2002;Gang et al, 2005;Yan et al, 2006). Furthermore, some of them had made important theoretical and practical achievements.…”

Section: Introductionmentioning

confidence: 96%

Desulphurization and Simultaneous Treatment of Wastewater from Blast Furnace by Pulsed Corona Discharge

Feng

et al. 2009

Environmental Engineering Science

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Laboratory tests were conducted for removal of SO 2 from simulated flue gas and simultaneous treatment of wastewater from blast furnace by pulsed corona discharge. Tests were conducted for the flue gas flow from 12 to 18 Nm 3 /h, the simulated gas temperature from 80 to 120°C, the inlet flux of wastewater from 33 to 57 L/h, applied voltage from 0 to 27 kV, and SO 2 initial concentration was about 1,430 mg/m 3 . Results showed that wastewater from blast furnace has an excellent ability of desulphurization (about 90%) and pulsed corona discharge can enhance the desulphurization efficiency. Meanwhile, it was observed that the SO 2 removal ratio decreased along with increased cycle index, while it increased as the flux of flue gas was reduced, and increased when the flux of wastewater from blast furnace was increased. In addition, results demonstrated that the content of sulfate radical produced in wastewater increase with an increment of applied pulsed voltage, cycle index, or the flux of flue gas. Furthermore, the results indicated that the higher the inlet content of cyanide the better removal effect of it, and the removal rate can reach 99.9% with a residence time of 2.1 s in the pulsed corona zone during the desulphurization process when the inlet content was higher, whereas there was almost no removal effect when the inlet content was lower. This research may attain the objective of waste control, and can provide a new way to remove SO 2 from flue gas and simultaneously degrade wastewater from blast furnace for integrated steel plants.

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A semi-wet technological process for flue gas desulfurization by corona discharges at an industrial scale

Cited by 32 publications

References 18 publications

(Sub)nanosecond transient plasma for atmospheric plasma processing experiments: application to ozone generation and NO removal

(Sub)nanosecond transient plasma for atmospheric plasma processing experiments: application to ozone generation and NO removal

Absorption of sulphur dioxide by electrosprayed droplets

Desulphurization and Simultaneous Treatment of Wastewater from Blast Furnace by Pulsed Corona Discharge

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