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- 저자 : Zhaolun Cui (검색결과 2 건)
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SF6 abatement in a packed bed plasma reactor: Role of zirconia size and optimization using RSM
Yuan Tian,Xiaoxing Zhang,Yufei Wang,Zhaolun Cui,Ju Tang 한국공업화학회 2021 Journal of Industrial and Engineering Chemistry Vol.94 No.-
This work describes plasma destruction of SF6 in a zirconia (ZrO2) packed bed plasma reactor (PBR). Electric signals, equivalent parameters, emission spectra and degradation results have been utilized toevaluate the influence of ZrO2 size on PBR discharge characteristics and SF6 degradation. The resultspresent that the size of ZrO2 has a significant impact on PBR discharge characteristics due to its influenceon physical parameters. Moreover, bigger ZrO2 beads packing shows a better performance in SF6degradation because of longer gas residence time. In addition, the key operating parameters includingflowrate, SF6 concentration, oxygen concentration, and water vapor concentration were optimized byresponse surface methodology (RSM) with Box-Behnken design (BBD). The proposed optimization modelshows satisfactory correlation between the predicted and actual results. For energy yield (EY), the mutualeffect offlowrate, SF6 concentration and water vapor concentration was significant. For SO2F2 selectivity,the mutual effect of SF6 concentration and water vapor concentration was significant. The optimum SF6abatement was predicted from RSM as 14.64 g/kWh and 14.42% for EY and SO2F2 selectivity atflowrate of200 mL/min, SF6 concentration of 3%, oxygen concentration of 0.83% and water vapor concentration of1.89%.
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Experimental Study on Thermal Catalytic Degradation of SF6 Waste Gas by Metal Phosphate
Zhang Xiaoxing,Li Xiaohan,Wang Yi,Meng Fei,Zou Yi,Tian Shuangshuang,Cui Zhaolun 대한전기학회 2023 Journal of Electrical Engineering & Technology Vol.18 No.2
In recent years, SF6 has been widely used in the electrical industry. The amount of SF6 waste gas produced by the corresponding gas insulated equipment is increasing year by year. However, SF6 has high global warming potential and long atmospheric life. Proper treatment of SF6 waste gas is particularly important for environmental protection. Thermal degradation can effectively eliminate the greenhouse effect caused by direct emission of SF6. In this paper, AlPO4, Zr3(PO4)4 and CePO4 were used as catalysts to degrade SF6/air mixture gas (The concentration of SF6 is 15%) at 800 °C. The concentration of SF6 gas was detected by gas chromatography (GC), and the gas decomposition products of SF6 were detected by gas chromatography mass spectrometry (GCMS) and fourier transform infrared spectroscopy (FTIR). The surface morphology and composition of the catalyst were analyzed by scanning electron microscope (SEM) and X-ray photoelectron spectroscopy (XPS). The results show that the three kinds of metal phosphates can promote the decomposition of SF6 gas, among which CePO4 had the best catalytic degradation effect, and the degradation rate of SF6 reached 84.7% in 12 h. The main products of SF6 gas thermal catalytic degradation include SF4, S2F10, SO2F2, SOF2, SiF4 and SO2 gas, etc. SEM scanning image shows that there were some objects adsorbed on the surface of CePO4 catalyst after the experiment. XPS spectra showed that Si and F elements were added to the catalyst. According to the binding energy, SiF4 was adsorbed on the catalyst. After the experiment, CeF3 was produced by CePO4 catalyst. Different catalysts have their own selectivity to the decomposition products of SF6, which is convenient for the treatment of products, and it is of great significance to eliminate the greenhouse effect caused by the waste gas of SF6.
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