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임계규,박무열,라승훈 湖西大學校工業技術硏究所 1996 工業技術硏究所論文集 Vol.15 No.-
활성탄을 이용한 고정층 흡착공정에서 스티렌 증기의 흡착특성과 흡착공정에 대한 최적 조업 설계 조건의 기초 자료를 제시 하고자 본 연구를 수행 하였다. 본 연구에 사용된 흡착탑은 내경이 20mm, 전장이 310mm인 Pyrex재질의 유리 컬럼을 이용하였다. 본 연구결과 실험시작 후 180분대에 파과점이 나타났고, 250분 경과 후 흡착이 종결되었다. 또한 실험 종료 후 활성탄의 무게를 측정한 결과 0.3 g styrene/g AC의 흡착능을 갖고 있음을 알 수 있었다. This study has been carried out to obtain the informations of adsorption characteristics and optimum design conditions for the adsorption of styrene vapor on activated carbon in a fixed bed adsorber. The adsorption tower used in this experiment was the column made of Pyrex with 20mm of inside diameter and 310mm of column depth. After starting the experiment, 10% break point was obtained around 180 minutes and the adsworption was completed around 250 minutes. Adsorption capacity was also determined 0.3 g of styrene/g of the activated carbon.
서울지역 지하철역의 공기 중 오염인자의 노선별 분포 특성
김민영,라승훈,신도철,한규문,최금숙,정일현 한국환경보건학회 1998 한국환경보건학회지 Vol.24 No.2
A comprehensive air quality monitoring was carried out to investigate the criteria concentration of air pollutant in indoor of subway stations of Seoul City. The samples were collected twice per year (the first and the second half of the year) at each sampling point from February to September in 1997. Sampling point of subway stations was ticket office and platform. The measurement of indoor air pollutants such as sulfur dioxide(SO$_2$), nitrogen dioxide(NO$_2$), carbon monoxide(CO), carbon dioxide(CO$_2$), total suspended particulate(TSP) was performed to determine the indoor air quality. Heavy metals(Pb, Cd, Cu, Cr, As, Hg) were also measured together with those air pollutants. The annual average concentration of CO$_2$ and TSP in subway stations were relatively high while those of heavy metals were within 10% of environmental recommended standard concentration in all stations. As results of regression analysis between line and line of air factors, the concentrations of CO, CO$_2$, TSP, Pb, Cd, Cr and Cu were highly correlated, but those of $SO_2, NO_2$ and Hg were not correlated. As results of regression analysis between ticket office and platform, the concentrations of heavy metals such as Cr and Cu were highly correlated. Results of oneway analysis of variance between the first and the second half of the year air factors also indicated that CO, CO$_2$, Cd, Cu, Hg were significant($\alpha$=0.01), respectively. The average contration of total suspended particulate(TSP) in subway line No. 1 was shown high concentration(200 $\mu g/m^3\cdot$ day) level.
임계규,라승훈,박무열 湖西大學校工業技術硏究所 1996 工業技術硏究所論文集 Vol.15 No.-
일반적으로 대기중으로 오염물질이 배출될 경우에는 그 농도를 규제 기준치 이하로 제한해야 한다. 본 연구에서는 활성탄 흡착시설을 이용하여 오염물질을 제어하고자 할 때 각 인자간의 상호관련성을 파악, 궁극적으로 휘발성유기화합물을 제어하는데 목적을 두었다. 탑 내의 작용인자 중 선속도와, 층의 두께에 따른 압력손실 부분을 집중 연구하였다. 그 결과 입상활성탄이 조립활성탄에 비해 상 통과 전·후의 압 손실이 더 큼을 파악하였으며, 선속도의 적정범위 15 - 30 m/min에서 입상활성탄의 ΔP = 2.714 * V1.46이고, 조립활성탄의 ΔP = 3.46 * V1.25라는 관계식을 도출하였다. 또한 선속도의 변화폭에 비해 층의 두께 변화에 따른 압 손실 변화폭은 크지 않았다. 이번 연구 결과는 향후 활성탄 흡착공정을 통한 휘발성유기화합물질의 제어시 그 기초 자료가 될 것으로 본다. In general, pollutants discharged in air must be controlled below regulatory value. The relations among the factors (i.e. superficial velocity, bed depth, pressure drop) were studied, when pollutants, especially volatile organic compounds(VOCs), were treated by activated carbon adsorption process. From the results of this study, crushed activated carbon had larger pressure drop than pelletted activated carbon. In the range of 15m/min to 30m/min of optimum superficial velocity, the pressure drop (ΔP) of crushed activated carbon and pelltted carbon could be modeled into ΔP = 2.714 * V1.46, ΔP = 3.46 * V1.25, respectively, from the experimental results. This study should be helpful to obtain the informations of optimum design conditions for adsorption of VOCs treatment process by activated carbon.