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CaO/CaCO<sub>3</sub> 다공체로 이루어진 활성 굴 패각의 물성 및 인 제거 효능에 관한 연구
이찬원,전홍표,권혁보,Lee, Chan-Won,Jeon, Hong-Pyo,Kwon, Hyok-Bo 한국세라믹학회 2010 한국세라믹학회지 Vol.47 No.6
In this study, the structure and properties of waste oyster shell and its phosphorus removal efficiency were investigated. Waste oyster shells are troublesome environmental waste in the coastal region where the oysters are produced. Waste oyster shells were pyrolyzed by bench-scale rotary kiln for its activation. It shows maximum 76% of phosphorus removal efficiency for the municipal wastewater and livestock wastewater. We found that the activated oyster shells can be used as a phosphorus removal agent with the consideration of high efficiency, easy processing, and cost effectiveness.
Ni 산성염과 Ni 염기성 염의 혼합에 의한 나노 NiO 분말 제조 및 이의 환원 특성
김창삼,윤동훈,전성운,권혁보,박상환,Kim, Chang-Sam,Yun, Dong-Hun,Jeon, Sung-Woon,Kwon, Hyok-Bo,Park, Sang-Hwan 한국결정성장학회 2010 韓國結晶成長學會誌 Vol.20 No.6
나노 크기의 NiO 분말을 Ni 산성염과 Ni 염기성염을 혼합하여 제조하는 방법에서 원료가 생성되는 NiO와 이의 환원으로 생성되는 Ni 결정 특성에 미치는 영향을 연구하였다. 산성염으로는 Ni formate를 염기성염으로는 수산화 Ni과 염기성 Ni 탄산염을 사용하였다. 혼합비는 산성염 1당량에 염기성염 9당량을 사용하였으며, 탄산염을 사용한 경우 $750^{\circ}C$/2 h 하소에서도 ~100 nm의 구형의 NiO 분말을 얻었으며, 수산화 염을 사용한 경우는 $600^{\circ}C$/2 h에서는 ~100 nm의 유사 구형의 NiO가 생성되나, $750^{\circ}C$ 열처리에서는 100~600 nm의 유사 입방체 분말을 얻었다. 수산화 염을 사용한 경우에는 탄산염을 사용한 경우에 비하여 수소가스에 의한 환원이 훨씬 빠르게 진행되어 necking이 일어나며 소결이 이루어져 다공체를 형성하였다. 이들 특성을 TG/DSC, XRD, SEM으로 분석하였다. Nanosized NiO powder was prepared by mixing an acid nickel salt and a base nickel salt and their reduction behavior was studied. Ni formate was employed as an acid salt and nickel hydroxide and basic nickel carbonate as base salts. One equivalent acid salt was mixed with 9 equivalent base salt. The mixture of the formate and the carbonate produced ~100 run spherical NiO powder by heat treatment at $750^{\circ}C$/2 h, but the mixture of the formate and the hydroxide gave rise to ~100 nm pseudo spherical NiO powder by heat treatment at $600^{\circ}C$/2 h and grew fast to give pseudo cubic crystals of 100~600 run by heat treatment at $750^{\circ}C$/2 h. Reduction by hydrogen gas proceeded much faster for the one with the hydroxide than that with the carbonate to give porous body with well grown necks. Their behavior was studied by analysis of TG/DSC, XRD, and SEM.
권혁보 경남대학교 환경문제연구소 1997 환경연구 Vol.20 No.-
Sulfur pollutant reduction technologies for coal combustion can be categorized into three groups: 1) pre-combustion coal cleaning. 2) during combustion in-situ sulfur reduction and advanced combustion. and 3) post combustion flue gas desulfurization. A certain amount of the sulfur can be removed from the coal prior to combustion by coal cleaning. Advanced combustion. including the fluidized-bed combustors, pressurized fluidized-bed combustors, and the integrated gasification combined cycle can also achieve high sulfur pollutant reduction. Limestorn slurry scrubbers, although costly, have been effective in removing more than 90% of the sulfur oxides form the flue gas. Emerging in-duct dry sorbent injection technologies may provide low-cost retrofit sulfur dioxide control options for existing coal-fired power plants.
권혁보 慶南大學校 附設 工業技術硏究所 1994 硏究論文集 Vol.12 No.-
본 연구에서는 연탄의 연소특성 연구 및 평가에 적합한 연소장치를 개발하여 연소 실험의 정확도와 재현성 향상 및 사용 편익을 도모할 수 있는 방안을 제시하였다. 시료의 건조, 점화 및 연소감량 측정 방식의 개선과 개인용 콤퓨터에 의한 자동화 방안을 제시하고 이를 이용한 연소 실험을 수행하였다. A coal test combustor for measurement of the combustion characteristics of holed coal briquette has been developed. New methods of drying and ignition were used to improve the accuracy and precision of measurements. The temperature, mass, and carbon monoxide emissions are continuously monitored throught the experiments. The microcomputer is coupled with test combustor system through a A/D and D/A converter for process control and data acquisition. And the new experimental conditions of standard holed coal briquette combustion test has been proposed through the extensive preliminary experiments.
권혁보 경남대학교 환경문제연구소 1997 환경연구 Vol.19 No.-
Laboratory results showed that methanol treatment of hydrated lime increased the BET surface area of the lime. The SO₂ capture capacity of the sorbent was increased. The SO₂ capture capacity of the sorbent was correlated with the surface area. At in-duct injection temperature 70-150℃, the temperature dependence of the SO₂ capture capacity of the sorbent was not shown.
권혁보 경남대학교 신소재연구소 1997 論文集 Vol.8 No.-
가연성가스 검지용 산화주석 센서의 반응특성에 대한 첨가물의 영향을 연구하였다. 염화주석과 암모니아의 액상반응시 첨가물을 넣어 만든 α-stannic acid를 650°C에서 2시간동안 열처리하여 만든 센서의 일산화탄소, 메탄 및 프로판 가스에 대한 감도와 선택성을 비교센서인 피가로사의 센서와 비교하였다. The influence of additives on the combustible gas sensing characteristics of tin oxide gas sensor has been investigated. Additives were introduced during the aqueous reaction of SnC14 and ammonia solution. The resulting a-stannic acid was calcined at 650℃ or 2 hours. Gas sensing characteristics to the carbon monoxide, methane and propane were compared with the commercial Figaro Co. sensors.
권혁보 경남대학교 환경문제연구소 1993 환경연구 Vol.15 No.-
The ability of sulfur dioxide up-take of Ginkgo biloba L. have been investigated using soluble sulfur contents of leafs as an indicator. Soluble sulfur contents of leafs increase with the exposure time to polluted air. The results suggest that the sulfur dioxide up-take ability of Ginkgo biloba L. is significant. The results also show that the rate of sulfur dioxide up-take of Ginkgo biloba L. in less polluted area increase rapidly with the growth of tree.