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김혜수(Hye soo Kim),김일호(Il Ho Kim),박노국(No-Kuk Park),이승종(Seung Jong Lee) 한국에너지기후변화학회 2021 에너지기후변화학회지 Vol.16 No.1
In this study, the acid gas adsorption characteristics of impregnated AC, which increased the chemical activity of AC and improved selective adsorption for specific components, were studied using lap-scale experimental devices. The three types of AC (general, KOH and K₂CO₃ impregnated) were identified by the analysis of SEM, BET and TGA. It was found that the surface area and the mass loss rate of AC differed depending on the type of impregnation contents. Subsequently, Three types of AC were evaluated for adsorption performance according to temperature. In addition, 20 wt% KOH impregnated AC conducted adsorption and breakthrough point of SO₂ and NO₂ gases. The breakthrough point of SO₂ and NO₂ is 15 and 7 minutes, respectively. The results of the experiment shown th t the adsorption efficiency of the impregnated AC was higher than that of the AC and was proportional to the temperature.
인쇄공정에서 배출되는 VOCs 종에 따른 촉매연소특성 조사
박노국(No-Kuk Park),권병찬(Byung Chan Kwon),강도형(Dohyung Kang),윤대식(Daesik Yun),류재홍(Jae-Hong Ryu),강석환(Suk-Hwan Kang) 한국에너지기후변화학회 2020 에너지기후변화학회지 Vol.15 No.1
In this study, the catalytic combustion characteristics according to the type of volatile organic compounds (VOCs) emitted from the printing process were investigated. The combustion characteristics were analyzed with the exothermic behavior on the catalyst bed during low-temperature combustion ignition using catalysts for methyl ethyl ketone (MEK), ethyl acetate (EA), and methanol(MeOH) among VOCs used in the gravure printing process. As a result of comparing and analyzing the temperature change in the inlet, middle, and outlet portions of the honeycomb catalyst packed in the reactor for each initial ignition temperature, it was confirmed that EA, MEK and MeOH were ignited above 250 °C, 270 °C, and 200 °C, respectively. It was confirmed that the differentiation of ignition and operating temperature is required depending on the type of VOCs in the catalytic combustion process in order to prevents to acting as a precursor of ultra-fine dust after discharged to the atmosphere of the solvent used in the printing process. It was concluded the deactivation of the combustion catalysts may be caused by the formation of carbon by incomplete combustion when MEK and EA were ignited at low-temperature.