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전자빔을 이용한 PFCs 분해 및 부산물 생성에 관한 연구
류재용,손영일,장성호 한국폐기물자원순환학회 2015 한국폐기물자원순환학회지 Vol.32 No.1
Nitrogen trifluoride (NF3) and Sulfur hexafluoride (SF6) are usually used as novel etching and cleaning gases in semiconductor industry and electrical equipments. Recently, the many studies about PFCs decomposition have been performed due to high global warming potential (GWP). This study is to identify the effects of the hydrogen on the destruction and removal efficiency (DRE) of NF3 and SF6 when using the electron-beam. The experiment was conducted at a flow rate of 10 LPM with NF3 and SF6 of 1,000 ppm. Absorbed dose (electric current) was 1,028 kGy (5 mA). The DREs of NF3 and SF6 gases increased about 54% and 68% respectively with hydrogen injection. By-products formed by NF3 and SF6 destruction were mainly HF and F2 gases. In addition, the particles were generated during the NF3 and SF6 destruction due to corrosion of reactor and SF6 decomposion, respectively.
구조단열패널(SIP)의 편심 축하중에 대한 실험적 평가
류재용,나환선,이세정,김상봉,최성모 한국복합신소재구조학회 2018 복합신소재구조학회 학술발표회 Vol.2018 No.04
Eccentric axial load tests were carried out to investigate the structural performance of the SIP (Structural Insulation Panel), which is widely used as residential type in Europe and North America. Outside the country, design standards for SIP have been prepared and related research has been carried out variously. However, in Korea, the research on the performance of the structural insulation panel is very small, and the related standard is not provided. In this study, the eccentric axial load was applied after the opening was installed to utilize the structural insulation panel as the structural wall. The size of the test specimen was 1200 × 2400㎜. The number of test specimens was 6, and the size of the openings and the reinforcement method around the openings were used as variables.
AFRP를 이용한 강재 보강에서 보강방법에 따른 부착성능
류재용,이원식,오경진,이상우,최성모 한국복합신소재구조학회 2013 복합신소재구조학회 학술발표회 Vol.2013 No.04
The Adhesion method is general to reinforce steel structures using FRP(Fiber reinforced Plastic) material. Until recently in many studies, the adhesion method is being utilized. Most of the problem of this method have been eliminated. The bond performance is not enough due to the delaminate of epoxy between FRP and steel. In order to improve the problem, a bolt tighting, FRP sheet wrapping is to evaluation the degree of bond performance improvement in study.
류재용,김도범,오경진,이상우,최성모 한국복합신소재구조학회 2012 복합신소재구조학회 학술발표회 Vol.2012 No.04
Rehabilitation of existing steel structure attached to a steel because cross-section is generally raising. But when the area of reinforcement increases, also increases the weight of steel can cause degradation of the operations. In addition, welding process cause discomfort which due to the interference of other process. To replace the existing method, there are researches and applications for civil steel structures on the outside. In this study, bond performance of FRP and Steel were tested to reinforce steel structures by using AFRP as well as CFRP.
Decomposition of NF3 Gas (greenhouse gas) using an Electron-beam with Additive Gases
류재용 한국폐기물자원순환학회 2019 한국폐기물자원순환학회지 Vol.36 No.3
The role of conditioning agents, such as hydrogen, oxygen, and water vapor in the destruction of NF3 gas using electronbeamtechnology was assessed in terms of the destruction and removal efficiency (DRE%). The DRE of NF3 usingelectron-beam technology was studied in a flow reactor. Experiments were conducted at a flow rate of 50 Lm−1 at roomtemperature. The inlet concentration of NF3 was 1,000 ppm, and the concentrations of conditioning agents ranged from500 to 3,000 ppm, respectively. In this study, the absorbed dose (electron-beam current) ranged from 0 (0 mA) to 424.7kGy (20 mA). Among the conditioning agents, hydrogen gas was found to play a significant role in the destruction ofNF3 gas. In the case of oxygen and water vapor, the water vapor increased the DRE of NF3, though by a small amount,and the oxygen decreased the DRE of NF3 gas. The DRE of NF3 gas increased with hydrogen gas concentration. Theresults presented here can be utilized to increase the effectiveness of electron-beam technology as a measure for reducingNF3, a toxic and potent greenhouse gas produced by the semiconductor industry.