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김종원,심규성,손영목,이상호,박기배,명광식 ( Jong Won Kim,Kyu Sung Sim,Young Mok Son,Sang Ho Lee,Kee Bae Park,Kwang Shik Myung ) 한국화학공학회 1994 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.32 No.6
Problems encountered in use of pulverized coal, in particular, have practical implications related to coal blending and up-grading of imported coals. Practically, significant problems are recognized in such aspects as control of the combustion process, fireside corrosion, ash and pollution. The methodology of predicting problems using pilot scale facility is less expensive, requires less coal and less time to excute, compared to the use of full scale facility. In this study, evaluation of Indonesian Roto coal was performed in a pilot scale coal combustion test facility. Burnout ratio of coal was higher than 98%, and increase of swirl number and preheat temperature of air made flame stabilize. NO_χ concentration in flue gas was lower in the range 0.5-0.9 of swirl number. Concentrations of oxygen and carbon dioxide in flue gas were constant in spite of variation of swirl number in this work.
김종원,손영목,심규성,박기배,이상호 ( Jong Won Kim,Young Mok Son,Kyu Sung Sim,Kee Bae Park,Sang Ho Lee ) 한국센서학회 1994 센서학회지 Vol.3 No.1
Catalytic combustion type sensor was fabricated for alcohol detection, and its characteristics were tested. When the resistance of Pt coil for pellistor is 2.0 ohm, suggestible input power to bridge circuit was about 300 mW for methanol detection, and in the range from 350 mW to 400 mW for ethanol. Pellistors were prepared by means of impregnating Pt or Pd on the γ-alumina bead for sensing element, and transition metals such as Co₃O₄, Fe₂O₃ for compensating element.
SnO2 과 Pt 를 첨가한 WO3 후막센서의 제조 및 NOx 감응 특성
이대식,한상도,박기배,심규성,이덕동,손영목 ( D . S . Lee,S . D . Han,K . B . Park,K . S . Sim,D . D . Lee,Y . M . Son ) 한국센서학회 1996 센서학회지 Vol.5 No.5
highly sensitive WO₃ doped with SnO₂ and Pt thick-film sensors for NOx gas were fabricated. The sensors had a maximum sensitivity at operating temperature of 250℃, but the optimum operation temperature, considering recovery desorption time, was at 330℃. These sensors improved sensitivity, response and recovery time, selectivity and stability, as compared to WO₃ sensors. The good linearity of sensitivity as a function of the gas concentration exhibited the possibility to be used for concentration meter.
In 과 Sb 의 첨가가 Tin Oxide 가스센서에서 Resistivity 와 Sensitivity 에 미치는 영향
손영목,한상도,김종원,심규성 ( Y . M . Son,S . D . Han,J . W . Kim,K . S . Sim ) 한국센서학회 1992 센서학회지 Vol.1 No.1
To determine the effect of additions of trivalent and pentavalent ions on the electrical conductivity and sensing behaviour, indium and antimony were incorporated in tin oxide by the coprecipitation method. Antimony may be considered to enter the cassiterite structure as pentavalent ions, thermal energy could excite electrons from these ions into the conduction band. Similarly the indium ions would enter the lattice as In^(3+) but could accept electrons from the valence band, thereby becoming monovalent or divalent. These phenomena, however, how the potential barrier existing SnO₂ by addition of two kinds of ions could influence on the sensing behaviour in comparison with their influence on the resistivity were observed.
The Effects of Additions of In & Sb on Resistivity & Sensitivity in Tin Oxide Gas Sensors
손영목,한상도,김종원,심규성,Son, Y.M.,Han, S.D.,Kim, J.W.,Sim, K.S. 한국센서학회 1992 센서학회지 Vol.29 No.3
3가와 5가 이온의 첨가가 전기전도도 및 감응도에 어떤 영향을 미치는가를 확인하기 위하여, In와 Sb를 Tin Oxide에 공침법으로 첨가하였다. Sb는 5가 이온으로 cassiterite 구조에 들어가서 열에너지에 의하여 이들 이온을 여기시켜 전도대로 밀어올리리라고 여겨진다. In 이온은 결정격자 속에 $In^{3+}$로 들어가서 원자가대로 부터 전자를 받게 되고 그러므로써 1가나 2가가 되리라 생각한다. 그러나, 이러한 현상들이 $SnO_{2}$에 존재하는 전위장벽을 2종의 이온첨가에 의하여 일어나는 resistivity에 끼치는 영향과 비교해 볼 때 감응도에는 어떤 영향을 보이는지 고찰하였다. To determine the effect of additions of trivalent and pentavalent ions on the electrical conductivity and sensing behaviour, indium and antimony were incorporated in tin oxide by the coprecipitation method. Antimony may be considered to enter the cassiterite structure as pentavalent ions, thermal energy could excite electrons from these ions into the conduction band. Similarly the indium ions would enter the lattice as $In^{3+}$ but could accept electrons from the valence band, thereby becoming monovalent or divalent. These phenomena, however, how the potential barrier existing $SnO_{2}$ by addition of two kinds of ions could influence on the sensing behaviour in comparison with their influence on the resistivity were observed.
김종원(J . W . Kim),심규성(K . S . Sim),손영목(Y . M . Son) 한국수소및신에너지학회 1990 한국수소 및 신에너지학회논문집 Vol.2 No.1
A search program which use only free energies of formation has been developed to find new thermochemical cycles as means of producing hydrogen and oxygen from water. The searching procedures are described and some closed thermochemical cycles from this program are presented here.