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MEA가 힘침된 MCM-41 흡착제의 CO₂ 흡착 특성
이중범(Jung Beom Lee),최성우(Sung Woo Choi) 大韓環境工學會 2011 대한환경공학회지 Vol.33 No.9
본 연구는 MEA가 함침된 MCM-41에 대하여 이산화탄소 흡착실험과 특성 분석을 하였다. 흡착제의 XRD, FT-IR, N2흡탈착 실험을 통하여 물리적 특성을 분석하였으며, 흡착실험은 15%의 이산화탄소를 사용하여 GC-TCD를 통하여 분석하였다. MEA 함침량이 10~40 wt%까지 함침량이 증가할수록 이산화탄소 흡착능은 증가하였다. 그러나 MEA 함침량이 50 wt%에서 흡착능이 감소하였다. 많은 아민이 제공되면 흡착제 표면에서 제공된 아민이 변형되는 경향이 있다. 그러므로 이산화탄소 흡착능이 감소될 수 있다. 본 연구의 결과로 이산화탄소 흡착을 위한 MCM-41에 MEA의 함침 함량의 조절이 중요하다는 것으로 사료되어진다. The CO₂ adsorption and characteristics of mesoporous silica MCM-41 impregnated by MEA (Monoethanolamine) were examined in this study. The adsorbents were characterized by XRD (X-ray powder diffraction), FT-IR (Fourier transform infrared spectroscopy), N2 adsorption-desorption isotherms. CO₂ adsorption measurements were carried out using a GC-TCD unit using 15% CO₂ gas. The CO₂ adsorption capacity of MCM-41 increased by MEA contents to 10~40 wt%, otherwise MEA content of 50 wt% was decreased CO₂ adsorption capacity. The amines tended to deform at MCM-41 surface if too many amines were provided. Therefore CO₂ adsorption capacity can be decreased. The results of this study suggest it is important to control content of MEA in MCM-41 for adsorption of CO₂.
이호범,이중기,신대윤,Lee, Ho-Beom,Lee, Jung-Ki,Shin, Dae-Yewn 한국환경보건학회 2005 한국환경보건학회지 Vol.31 No.5
This study is undertaken to find the optimal method to make the decision on the degree of water pollution by comparison of K-WQI, KOE-WQI that is made for index with the water quality index and water quality environment standard of the Frame Act on Environment Policy as the result of survey for water quality reality on the major point of the Yeongsan river from 2002 to 2004. The water quality of major rivers has some differences depending on seasons. however, under the water quality standard by the $BOD_5$ density, most of rivers displayed the water quality level of $II{\sim}III$ grading, and on K-WQI that is classified by indexing for 10 categories of pH, DO, $BOD_5,\;COD,\;SS,\;T-N,\;NH_3-N,\;NO_{3^-}$ N, T-P, and E-Coli and classified into 5 groups from 100 points to 40 points, they displayed the score distribution of the first grade in water quality for $85{\sim}100$ points to the second grade in water quality for $70{\sim}84$ points. On KOE-WQI that is classified by indexing for 5 categories of pH, DO, $BOD_5$, COD and T-coli and classified into 5 groups from 90 points or above for outstanding and 29 points or below for very bad, and the water quality distribution is made ranged from the first grade in water quality for 90 points or more to the third grade in water quality for $69{\sim}50$ points. In addition, for the contribution of the water quality decline, the Environmental standard has significant dependency on the $BOD_5$ density, with K-WQI contributing in various water quality decline depending on the environment around the river area of $BOD_5,\;T-N,\;NH_3-N,\;NO_3-N,\;T-P$, and E-Coli, and KOE-WQI acting os the factor contributing to lower the water quality decline by $BOD_5$, COD, and T-coli. As such, the current water quality environment standard has high dependency on $BOD_5$ and KOE-WQI excludes some nitrogen and phosphorus that considers the river environment that the grade in water quality is set by some category, and K-WQI reflected well of the ecology environment of rivers with the diversity of the assessment factor as well as to have the low dependency of specific factor to be objective.
세라믹캔들필터 집진 전후 Ash의 크기 및 분포에 관한 연구
정진도,이중범,김종영,Jeong, Jin-Do,Lee, Jung-Beom,Kim, Jong-Yeong 대한기계학회 1996 大韓機械學會論文集B Vol.20 No.5
Protection of gas turbine blade from its erosion and abrasion at high temperature and pressure is the first goal to cleanup the hot gas upstream for IGCC and PFBC. Ceramic filters represent an attractive technology for particle removal at high temperature and high pressure condition. They have demonstrated being a good system for improvement of thermal efficiency and reduction of effluent pollutants in advanced coal-based power systems such as IGCC and PFBC. Ceramic filter elements currently being developed were evaluated in the previous paper. In this paper, we measured the ash size and distribution on cleaning of ceramic candle filter. The results are as follows : in this experimental range, ceramic candle filter was shown to be fully adequate for the removal process of dust under high temperature and pressure. Also filtration efficiency of ceramic candle filter was higher than 98% compared with the regulation limit of particle size in gas turbine inlet.
최성우 ( Sung Woo Choi ),이중범 ( Jung Beom Lee ) 한국환경과학회 2011 한국환경과학회지 Vol.20 No.1
Air quality monitoring networks are very important facilities to manage urban air pollution control and to set up an environmental policy. Since air quality monitoring network of Daegu was allocated from 1980s to mid-90s, there is need to reevaluate it and relocated its site. This study was evaluated the position of Daegu air quality monitoring station by unit environmental sensitivity index, grid emission rate, CAI (Comprehensive Air-quality Index) point. The investigation domain covered an area of 16 × 24 km centered at the metropolitan area of Daegu with grid spacing of 2 km. The location of alternative air quality monitoring networks was selected through optimization and quintiles analysis of total score. The result showed that all things considered, new air quality monitoring network need to install grid numbers 10, 28, 36, 37, 46. We also recommand three scenarios of alternative air quality monitoring network when considering unit environmental sensitivity index, emission rate and CAI point.
위영호 ( Wi Yeong Ho ),최민 ( Choe Min ),박소진 ( Park So Jin ),류청걸 ( Lyu Cheong Geol ),이중범 ( Lee Jung Beom ) 한국공업화학회 2003 공업화학 Vol.14 No.5
본 연구의 목적은 유동층이나 고속유동층 탈황반응기에 적용할 수 있는 고온고압 아연제 탈황제를 개발하고자 하는 것이다. 이러한 목적을 위하여 가압노즐 분무건조기를 이용하여 아연계 탈황제를 성형 제조하여 ZAC이라 명명하였다. 분무건조 성형된 탈황제 중 ZAC-9를 대상으로 SEM에 의한 형상분석, XRD 분석, BET 표면적 측정, 입자크기 및 분포측정, 내마모도 측정 등 물리적 특성을 분석하였으며, TGA와 고온고압 탈황반응기에서 황읍 수력을 측정하였다. 그 결과 ZAC-9는 구형의 형상과 평균 116 ㎛의 크기를 갖는 등 유동층 공정에 적합한 물리적 특성을 갖추었으며, TGA 황흡수력은 16~21 wt%, 고온고압 탈황반응기에서의 초기값의 50% 이상 유지하는 결과를 나타내었다. The goal of this study was the development of HTHP Zn-based sorbents for adaptation in a fluidized bed desulfurizer or Transport Reactor. For this purpose. zinc-based sorbents using a spray dryer with a pressurized nozzle atomizer was developed and it was named ZAC. For the ZAC series sorbents the physical properties such mean particle size & distribution analysis and attrition ratio analysis for ZAC-9 sorbent were characterized using SEM, BET surface area. and XRD pattern. After the characterizations, TGA & HTHP (High Temperature High Pressure) reactor experiments were carried out for chemical sulfur absorbing capacity. The results showed that sorbents were spherical in shape and the mean particle size was about 116 μm. The attrition resistance was acceptable to be adapted in a fluidized bed desulfurizer. Sulfur absorbing capacity of a fresh sample, measured by TGA was approximately 16-21 wt%, and HTHP sulfur absorbing capacity was high, sustaining more more than 50% of initial value.