Effects of background gas on sulfur hexafluoride removal by atmospheric dielectric barrier discharge plasma

Zhang, Xiaoxing; Xiao, Haibo; Hu, Xiongxiong; Gui, Yingang

doi:10.1063/1.4967277

Cited by 22 publications

(4 citation statements)

References 22 publications

(32 reference statements)

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“…There may be also differences in electron density, temperature, and energy as well as in UV light intensity, but these are supposed to be small as compared to O radicals. 8 Comparative tests in this study were conducted at a fixed voltage. Discharge power determined from VQ Lissajous figures for different atmospheres was 35.6 W for argon, 26.0 W for air, and 16.5 W for oxygen; sterilization effect was the highest in oxygen rich in O radicals even when applied voltage was increased to reach same discharge power as in argon or in air.…”

Section: Discussionmentioning

confidence: 99%

Sterilization of stem‐end rot of mango using dielectric barrier discharge and investigation of sterilization factors

Nakakoga

Tada

Sakoda

et al. 2021

Elect Comm in Japan

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To develop a sterilization method for controlling post-harvest stem-end rot of mango, we examined to sterilize fungi on peduncle by using the dielectric barrier discharge (DBD). Additionally, to investigate the sterilization factors, we performed sterilization against stem-end rot on agar medium by using the DBD generated in air, argon gas, or oxygen gas. It was found that the DBD can sterilize fungi with high probability. Ultra-violet ray and O 3 do not contribute to the sterilization. High energy electrons, and radicals such as O and OH play an essential role for the sterilization.

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Section: Discussionmentioning

confidence: 99%

Sterilization of stem‐end rot of mango using dielectric barrier discharge and investigation of sterilization factors

Nakakoga

Tada

Sakoda

et al. 2021

Elect Comm in Japan

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“…Among them, the active particles of Ar were all Ar I-type lines, which were generated when the excited state of Ar atoms transited to a lower energy level. The Ar gas ratio accounted for 98%, and Ar easily obtained the energy required to generate excited state particles [46], therefore in all three systems, the Ar lines were the strongest lines. There were also S and F lines in the three spectra.…”

Section: Products Analysismentioning

confidence: 94%

Plasma-assisted abatement of SF₆ in a dielectric barrier discharge reactor: investigation of the effect of packing materials

Cui

Zhang

Tian

et al. 2019

J. Phys. D: Appl. Phys.

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The greenhouse gas hexafluoride (SF6) and its degradation is a research hotspot in the environmental field. In a double-layer dielectric barrier discharge reactor, the degradation process of SF6 was studied when packed in glass beads or γ-Al2O3 pellets as well as with no packing system. The results show that the packing materials changed the physical characteristics of the discharge, increasing the equivalent capacitance and discharge power and leading to the generation of more active particles and high-energy electrons. Additionally, the two packing materials effectively improved the degradation removal efficiency (DRE) and energy yield (EY) of SF6. In the γ-Al2O3 system, 2% SF6 gas obtained a maximum DRE of 85.97% with a 110 W input power and the EY reached 9.17 g kWh−1, far exceeding the case without packing. Moreover, the glass bead packing had no obvious effect on the degradation products, while the packing of γ-Al2O3 particles promoted SO2 production and reduced the formation of SOF2, SO2F2 and SOF4. Meanwhile, in the γ-Al2O3 system, the yield of SO2 increased with increasing input power and some undesirable products such as SO2F2 were reduced. These results show that the addition of suitable packing materials such as γ-Al2O3 pellets can effectively promote the harmless degradation of SF6.

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“…The experimental setup has been described in our previous study [12] and is shown in Figure 1. In this experiment, the discharge frequency is maintained at 8.5-9.0 kHz and input power is controlled within 100 W. We selected argon (Ar) as the background gas for SF 6 dilution due to its promotion effects on the discharge and SF 6 degradation [21]. The standard gases of Ar and SF 6 are in high purity of 99.99%, and they are mixed to a certain proportion by a gas sample compounder.…”

Section: Experimental Setup and Degradation Parametersmentioning

confidence: 99%

SF ₆ catalytic degradation in a γ‐Al ₂ O ₃ packed bed plasma system: A combined experimental and theoretical study

et al. 2022

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Effective abatement of the greenhouse gas sulphur hexafluoride (SF 6 ) waste is of great importance for the environment protection. This work investigates the size effect and the surface properties of γ-Al 2 O 3 pellets on SF 6 degradation in a packed bed dielectric barrier discharge (PB-DBD) system. Experimental results show that decreasing the packing size improves the filamentary discharges and promotes the ignition and the maintenance of plasma, enhancing the degradation performance at low input powers. However, too small packing pellets decrease the gas residence time and reduce the degradation efficiency, especially for the input power beyond 80 W. Besides, lowering the packing size promotes the generation of SO 2 , while reduces the yields of S-O-F products, corresponding to a better degradation. After the discharge, the pellet surface becomes smoother with the appearance of S and F elements. Density functional theory calculations show that SF 6 is likely to be adsorbed at the Al III site over the γ-Al 2 O 3 (110) surface, and it is much more easily to decompose than in the gas phase. The fluorine gaseous products can decompose and stably adsorb on the pellet surface to change the surface element composition. This work provides a better understanding of SF 6 degradation in a PB-DBD system.

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Effects of background gas on sulfur hexafluoride removal by atmospheric dielectric barrier discharge plasma

Cited by 22 publications

References 22 publications

Sterilization of stem‐end rot of mango using dielectric barrier discharge and investigation of sterilization factors

Sterilization of stem‐end rot of mango using dielectric barrier discharge and investigation of sterilization factors

Plasma-assisted abatement of SF₆ in a dielectric barrier discharge reactor: investigation of the effect of packing materials

SF ₆ catalytic degradation in a γ‐Al ₂ O ₃ packed bed plasma system: A combined experimental and theoretical study

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Effects of background gas on sulfur hexafluoride removal by atmospheric dielectric barrier discharge plasma

Cited by 22 publications

References 22 publications

Sterilization of stem‐end rot of mango using dielectric barrier discharge and investigation of sterilization factors

Sterilization of stem‐end rot of mango using dielectric barrier discharge and investigation of sterilization factors

Plasma-assisted abatement of SF6 in a dielectric barrier discharge reactor: investigation of the effect of packing materials

SF 6 catalytic degradation in a γ‐Al 2 O 3 packed bed plasma system: A combined experimental and theoretical study

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Plasma-assisted abatement of SF₆ in a dielectric barrier discharge reactor: investigation of the effect of packing materials

SF ₆ catalytic degradation in a γ‐Al ₂ O ₃ packed bed plasma system: A combined experimental and theoretical study