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- 저자 : Keunho Du (검색결과 3 건)
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( Husna Inna ),( Hye Ok Park ),( Ji Yeon Choi ),( Yohan Park ),( Keunho Du ),( Won Shik Shin ) 한국폐기물자원순환학회(구 한국폐기물학회) 2015 한국폐기물자원순환학회 추계학술발표논문집 Vol.2015 No.-
Steel slag has been used as the alternative binder to replace Portland cement that furthermore used as in construction and/or for stabilization/solidification of heavy metals in mine soil. One of the treatments to modify the leaching behavior of the mine soil is by carbonation. The purpose of this study was to assess the potential of carbonation in various steel slags. Based on chemical and mineralogical characterization of four kinds of slag that were used in this study, it showed that all slags had high potential for reacting with CO<sub>2</sub> that was in accordance with the high CaO and MgO content. CO<sub>2</sub> sequestration by aqueous carbonation of several kinds of stainless steel slags with different liquid to solid ratio was investigated in this study. The effect of chemical properties and reaction time on the performance of the carbonation process was also investigated. Converter slag, blast furnace slag (BFS) and ladle furnace slag (LFS) were used. Carbonation experiment was conducted in a closed reactor under the conditions; 1bar, 400rpm and 25℃, with solid to liquid ratios of 0.4, 0.6 and 1.0. Carbonation kinetic test was relatively fast and completed within 5 hours. The CO<sub>2</sub> consumption increased when the liquid to solid ratio increased because of the dilution effect. Our results showed that the higher CaO and MgO contents in the slag, the higher CO<sub>2</sub> consumption was observed. Pohang converter slag and Dangjin LFS showed slightly different tendency. At L/S ratio 0.4, Pohang slag with higher CaO and MgO content had higher CO<sub>2</sub> consumption than Dangjin LFS. As the water content increased, Dangjin LFS had higher CO<sub>2</sub> consumption than Pohang converter slag that was caused by the texture of Dangjin LFS with smaller particle size than Pohang converter slag. However, both Pohang BFS and Dangjin BFS have poor capacity in CO<sub>2</sub> sequestration. Acknowledgement: This subject is supported by Korea Ministry of Environment (MOE) as GAIA (Geo-Advanced Innovative Action) Project.
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해양 환경에서의 USN 미들웨어 기반 센서 데이터 마이닝
김성호 ( Sungho Kim ),김룡 ( Lyong Kim ),이준욱 ( Junwook Lee ),정재두 ( Chungjae Du ),류근호 ( Keunho Ryu ) 한국정보처리학회 2006 한국정보처리학회 학술대회논문집 Vol.13 No.2
유비쿼터스는 간단히 말해서 많은 센서 들로 이루어진 무선 센서 네트워크이며 해양 환경 감시 서비스는 해양에 센서들을 설치함으로써 유비쿼터스 환경을 구축하고 해양 환경 변화를 감시한다. 센서 노드들로부터 수온, 기온, 염도 등을 센서 데이터들이 측정이 되며 이러한 데이터를 기반으로 유용한 지식을 탐사해낸다. 그러나 기존의 데이터 마이닝 기법은 이력 데이터에 대해서 마이닝 기법을 적용하지만 센서 데이터들은 아주 빠른 속도로 대량으로 유입이 되기 때문에 기존의 데이터 마이닝 기법은 적용이 불가능하게 된다. 그러므로 센서 데이터에 맞는 새로운 센서 데이터 마이닝 기법이 필요하다. 본 논문에서는 센싱된 센서 데이터들을 기반으로 해양 환경 감시 서비스에 제공할 수 있는 센서 마이닝 기법들을 제안한다.
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Effect of Liquid to Solid Ratio on the Aqueous Carbonation of Steel Slag CO2 Sequestration
Husna Inna,Hye Ok Park,Ji Yeon Choi,Yohan Park,Keunho Du,Won Shik Shin 한국폐기물자원순환학회 2015 한국폐기물자원순환학회 학술대회 Vol.2015 No.11
Steel slag has been used as the alternative binder to replace Portland cement that furthermore used as in construction and/or for stabilization/solidification of heavy metals in mine soil. One of the treatments to modify the leaching behavior of the mine soil is by carbonation. The purpose of this study was to assess the potential of carbonation in various steel slags. Based on chemical and mineralogical characterization of four kinds of slag that were used in this study, it showed that all slags had high potential for reacting with CO2 that was in accordance with the high CaO and MgO content. CO2 sequestration by aqueous carbonation of several kinds of stainless steel slags with different liquid to solid ratio was investigated in this study. The effect of chemical properties and reaction time on the performance of the carbonation process was also investigated. Converter slag, blast furnace slag (BFS) and ladle furnace slag (LFS) were used. Carbonation experiment was conducted in a closed reactor under the conditions; 1bar, 400rpm and 25℃, with solid to liquid ratios of 0.4, 0.6 and 1.0. Carbonation kinetic test was relatively fast and completed within 5 hours. The CO2 consumption increased when the liquid to solid ratio increased because of the dilution effect. Our results showed that the higher CaO and MgO contents in the slag, the higher CO2 consumption was observed. Pohang converter slag and Dangjin LFS showed slightly different tendency. At L/S ratio 0.4, Pohang slag with higher CaO and MgO content had higher CO2 consumption than Dangjin LFS. As the water content increased, Dangjin LFS had higher CO2 consumption than Pohang converter slag that was caused by the texture of Dangjin LFS with smaller particle size than Pohang converter slag. However, both Pohang BFS and Dangjin BFS have poor capacity in CO2 sequestration.
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