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이진석,이준표,조재경,이영우,홍종준,박순철 ( Jin Suk Lee,Jun Pyo Lee,Jae Kyung Cho,Young Woo Lee,Jong Jun Hong,Soon Chul Park ) 한국화학공학회 1994 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.32 No.1
For the development of large-scale enzymatic hydrolysis of lignocellulosics, the influence of various parameters has been studied. Steam explosion and delignification by NaOH have been adopted as a pretreatment process. Optimum pretreatment condition based on both cellulose yield and saccharification rate and yield were determined to be 6 min for steam explosion at 25 ㎏/㎠ and 0.2% NaOH for delignification. With the addition of β-glucosidase, the rate and extent of hydrolysis were increased significantly. Optimum enzyme loading was determined to be 15 IU/g substrate with supplementation of β-glucosidase. The addition of surfactant(0.1%) increased the hydrolysis yield by 10%.
이진석,이상진,Lee, Jin-Seok,Lee, Sang-Jin 한국국방경영분석학회 2005 한국국방경영분석학회지 Vol.31 No.1
The ROK TRANSCOM and Army Logistics Command have established wartime overland transportation plans. They have to mobilize several wartime overland transportation troops in order to meet the wartime transportation requirement. But there are some uncertainties in the process of transportation such as the number of vehicles to mobilize, the vehicle utilization factor, and round trip time. Here, we established two models. One is the simulation model to evaluate the transportation capability considering uncertain factors. The simulation model is executed with two scenarios and then the results are analyzed through a sensitivity analysis. The other model is the regression model to analyze the effects of transportation factors toward capability.
Recovery of Copper from Spent Photovoltaic Ribbon in Solar Module
이진석,장보윤,김준수,안영수,강기환,왕제필,Lee, Jin-Seok,Jang, Bo-Yun,Kim, Joon-Soo,Ahn, Young-Soo,Kang, Gi-Hwan,Wang, Jei-Pil The Korean Institute of Resources Recycling 2013 資源 리싸이클링 Vol.22 No.5
폐 태양광 전지내의 구리리본전극으로부터 구리를 회수하기 위해 불활성 가스분위기하에서 $300-600^{\circ}C$로 열처리 하였다. 구리리본전극의 코팅층은 68.99 wt.%의 납과 31.21 wt.%의 주석으로 구성되어 있는데, 각각의 온도에서 코팅층을 용해한 후 반응도가니에 용해된 코팅층 회수하였다. 열처리 후 회수되어진 코팅층은 ICP-MS (Inductively coupled plasma mass spectrometry)로 성분 분석을 실시하였으며, 온도범위에 관계없이 95 wt.% 이상의 구리순도를 얻을 수 있었다. 구리리본전극 샘플의 횡단면은 SEM (scanning electron microscopy) and EDX (energy dispersive X-ray microscopy)로 관찰하였다. The recovery of copper from spent photovoltaic ribbon was conducted using thermal treatment method at the range of temperature of $300^{\circ}C$ to $600^{\circ}C$ under inert atmosphere. The coating layer consisted of lead of 68.99 wt.% and tin of 31.21 wt.% was melted down at elevated temperatures and was collected on the bottom of crucible. The chemical composition of copper ribbon after thermal treatment was analyzed by ICP-MS (Inductively coupled plasma mass spectrometry) and the purity of copper was found to be obtained up to about 96 wt.% regardless of temperatures. The cross-sectional area of the specimen was also examined by SEM (scanning electron microscopy) and EDX (energy dispersive X-ray microscopy).