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고온 불활성 기체 분위기에서 아산화질소 열분해 및 반응속도에 관한 연구
이한민,윤재근,홍정구,Lee, Han Min,Yun, Jae Geun,Hong, Jung Goo 한국분무공학회 2020 한국액체미립화학회지 Vol.25 No.3
N<sub>2</sub>O is hazardous atmosphere pollution matter which can damage the ozone layer and cause green house effect. There are many other nitrogen oxide emission control but N<sub>2</sub>O has no its particular method. Preventing further environmental pollution and global warming, it is essential to control N<sub>2</sub>O emission from industrial machines. In this study, the thermal decomposition experiment of N<sub>2</sub>O gas mixture is conducted by using cylindrical reactor to figure out N<sub>2</sub>O reduction and NO formation. And CHEMKIN calculation is conducted to figure out reaction rate and mechanism. Residence time of the N<sub>2</sub>O gas in the reactor is set as experimental variable to imitate real SNCR system. As a result, most of the nitrogen components are converted into N2. Reaction rate of the N<sub>2</sub>O gas decreases with N<sub>2</sub>O emitted concentration. At 800℃ and 900℃, N<sub>2</sub>O reduction variance and NO concentration are increased with residence time and temperature. However, at 1000℃, N<sub>2</sub>O reduction variance and NO concentration are deceased in 40s due to forward reaction rate diminished and reverse reaction rate appeared.
김상영(Sang Young Kim),김남용(Nam Yong Kim),김주용(Ju Yong Kim),김동준(Dong Jun Kim),윤재근(Jae Geun Yun),양희천(Hei Cheon Yang) 대한기계학회 2015 대한기계학회 춘추학술대회 Vol.2015 No.11
The objective of this study was to experimentally investigate the flow characteristics of a new slurry pump. The new rotor type slurry pump consisted of an electric motor, driving shaft and coupling, a rotor, an impeller, suction and discharge pipes. The experimental parameters were the design conditions of a rotor which were the diameter, thickness and height of rotor. The measuring parameters were the vacuum pressure of suction tube, the discharge flow rate and pressure, and the voltage and current of electric motor. It was found that as the rotor diameter and height increase, the head and efficiency increase. However, there is no significant effect of rotor thickness on the head and efficiency.