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백지숙(Baek, Ji-Suk),박진수(Park, Jin-Soo),김경현(Kim, Kyung-Hyun),문기영(Moon, Gi-Young),김혜경(Kim, Hye-Kyung),최영우(Choi, Young-Woo),박구곤(Park, Go-Gun),양태현(Yang, Tae-Hyun),김창수(Kim, Chang-Soo),설용건(Shul, Young-Gun) 한국신재생에너지학회 2009 한국신재생에너지학회 학술대회논문집 Vol.2009 No.11
The water-like ionic liquids have been widely used to enable the proton conduction in ionic liquid based membranes at high temperature and anhydrous PEFCs. In this study, we synthesized various kinds of composite membranes based on hydrocarbon polymers having good thermal and mechanical stabilities at high temperatures and ionic liquids. The composite membrane consisting of hydrocarbon polymer and ionic liquid was characterized by thermogravimetric analyzer (TGA) and impedance spectroscopy. Consequently the non-aqueous composite membranes of a variety of hydrocarbon polymer and ionic liquids have good conductivity and thermal stability at high temperature conditions.
Electrosorption of Uranium Ions in Liquid Waste
Hye-Young Lee,Chong-Hun Jung,Won-Zin Oh,Jin-Ho Park,Yong-Gun Shul 한국탄소학회 2003 Carbon Letters Vol.4 No.2
A study on the electrosorption of uranium ions onto a porous activated carbon fiber (ACF) was performed to treat uraniumcontaining lagoon sludge. The result of the continuous flow-through cell electrosorption experiments showed that the applied negative potential increased the adsorption kinetics and capacity in comparison to the open-circuit potential (OCP) adsorption for uranium ions. Effective U(VI) removal is accomplished when a negative potential is applied to the activated carbon fiber (ACF) electrode. For a feed concentration of 100 mg/L, the concentration of U(VI) in the cell effluent is reduced to less than 1 mg/L. The selective removal of uranium ions from electrolyte was possible by the electrosorption process.
졸 - 겔 가압코팅법을 이용한 TiO2 복합막의 제조 및 기체 투과특성에 관한 연구
조영일,설용건,김정훈,전경용,한준영 한국화학공학회 2000 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.38 No.4
Acetyl acetone으로 개질한 티타늄 알콕사이드로부터 TiO₂졸을 제조한 후 다공성 α-알루미나 지지체에 가압코팅법을 사용하여 TiO₂복합분리막을 제조하였다. Acetyl acetone이 축합반응을 억제함으로써 제조된 졸의 입자크기는 5-10 ㎚였다. H₂O/Ti^(4+)≥2인 경우에 있어 첨가된 물의 양에 따른 입자크기가 10 ㎚이하로 나타났다. 또한, 장시간의 숙성시간은 입자성장에는 영향을 주지 못하였다. 350℃에서 열처리한 분리막층은 균열이 없었고 기공지름은 2-3㎚의 범위였다. 2bar로 4회 반복하여 졸을 코팅하였을 때 복합막의 수소 및 질소의 기체투과율의 범위는 각각 68.5-99.6×10^(-7) 및 18.2-32.7×10^(-7) ㏖/(㎡·s·Pa)였다. 또한. 수소 및 질소의 투과율비로부터 계산된 이상적 분리계수가 Knudsen 확산에 의한 분리계수인 3.74와 거의 일치하는 3.76을 얻었다. TiO₂sol was made from titanium alkoxide modified by acetyl acetone. After that, TiO₂composite membrane was prepared using the pressurized coating method. As acetyl acetone obstructed condensation reaction, the particle size of the sol was 5-10 ㎚. The range of the particle diameter was under 10 ㎚ in case of H₂O/Ti^(4+)≥2. Also, long aging time couldn't affect particle growth. The top layer of separation membranes treated at 350 ℃ didn't crack and the pore diameter was 2-3 ㎚. For the membranes, which was prepared by pressurized coating method for 4 times at 2 bar, the range of hydrogen and nitrogen permeance of composite membranes showed 8.5-99.6×10^(-7) and 18.2-32.7×10^(-7) ㏖/(㎡·s·Pa)respectively. And the ideal separation factor from the ratio of the H₂and N₂permeance was 3.76, which was in accordance with the value of Knudsen diffusion, 3.74.
알칼리이온이 치환된 제올라이트 상에서의 o-Xylene 의 알케닐화 반응
김영대,조영상,설용건,김전태 한국화학공학회 2001 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.39 No.3
알칼리이온이 치환된 제올라이트 X 및 Y를 촉매로 사용하여 PEN수지의 원료인 2,6-NDCA의 전구체인 5-(o-tolyl)-pentene 를 제조하기 위한 반응조건을 알아보고 알칼리이온이 치환되어진 제올라이트 촉매의 염기적인 특성이 o-xylene과 1,3-butadiene 사이의 alkenlyation 반응의 반응성 및 5-(o-tolyl)-pentene의 선택도에 미치는 영향을 연구하였다. 이를 위해 알칼리이온이 치환된 제올라이트 촉매 상에서 기상반응을 통해 o-xylene과 1,3-butadiene의 alkenlyation 반응을 수행하였다. 알칼리이온이 치환된 촉매의 염기도는 pyrrole의 TPD 실험을 통해 측정하였다. 알칼리이온이 치환된 제올라이트 촉매의 경우 약염기점 및 강염기점의 두 종류의 염기점이 존재하는 것으로 나타났으며, 염기도가 높은 알칼리이온으로 치환될수록 약염기점의 양이 감소한 반면 강염기점의 양이 증가하였다. 약염기점의 양이 증가할수록 alkenylation 반응의 반응성이 증가하는 것으로 나타났고, 강염기점이 증가할수록 5-(o-tolyl)-Pentene로의 선택성이 증가하는 것으로 나타났다. 그러나 강염기인 Rb및 Cs가 치환된 경우에는 광범위한 강염기점의 존재로 인해 o-xylene에 두 개 이상의 1,3-butadiene이 결합된 고분자량 화합물들이 형성되어 오히려 5-(o-tolyl)-pentene의 선택도가 감소하였다. The gas phase alkenylation of o-xylene with 1,3-butadiene was studied on the alkali cation exchanged zeolites X and Y. The alkenylation product, 5-(o-tolyl)-pentene, is a major precursor of 2,6-dimethylnaphthalene which is the raw material of polyethylene naphthalate (PEN). The relation between the basicity of the alkali canon exchanged zeolites and the alkenylation activity and selectivity was investigated. It was found by TPD analysis that there were two kinds of basic sites on the alkali canon exchanged zeolites: one was weak and the other was strong. The activity of alkenylation of o-xylene increased with the amount of the weak basic sites, while the selectivity of 5-(o-tolyl)-pentene enhanced with the amount of the strong basic sites on the catalysts.
Yoon, Ji-Young,Lee, Myung-Hyun,Kim, Younghee,Seo, Won-Seon,Shul, Yong-Gun,Lee, Won-Jae,Jeong, Seong-Min Institute of Pure and Applied Physics 2017 Japanese Journal of Applied Physics Vol. No.
<P>With the top seeded solution growth (TSSG) method, SiC crystals are grown in a Si-C solution where the dissolved C is supplied from graphite crucibles. In this study, the reactivity of the graphite was enhanced by roughening the surface to form a SiC interlayer, the intermediate compound in the dissolution of C to a Si melt. As a result, we clearly observed an enhancement in the growth rate by roughening the graphite surface in the crystal growth of SiC using TSSG method. (C) 2017 The Japan Society of Applied Physics</P>
Electrosorption of Uranium Ions in Liquid Waste
Lee, Hye-Young,Jung, Chong-Hun,Oh, Won-Zin,Park, Jin-Ho,Shul, Yong-Gun Korean Carbon Society 2003 Carbon Letters Vol.4 No.2
A study on the electrosorption of uranium ions onto a porous activated carbon fiber (ACF) was performed to treat uraniumcontaining lagoon sludge. The result of the continuous flow-through cell electrosorption experiments showed that the applied negative potential increased the adsorption kinetics and capacity in comparison to the open-circuit potential (OCP) adsorption for uranium ions. Effective U(VI) removal is accomplished when a negative potential is applied to the activated carbon fiber (ACF) electrode. For a feed concentration of 100 mg/L, the concentration of U(VI) in the cell effluent is reduced to less than 1 mg/L. The selective removal of uranium ions from electrolyte was possible by the electrosorption process.
남동군(Nam, Dong-Gun),소수현(So, Soo-Hyun),임우섭(Lim, Woo-Sub),이장원(Lee, Jang-Won),김남혁(Kim, Nam-Hyuk),신이철(Shin, Yi-Shul),권영진(Kwon, Young-Jin) 한국화재소방학회 2010 한국화재소방학회 학술대회 논문집 Vol.2010 No.추계
건축물의 창문 등에서 분출하는 화염 특성은 건축물의 화재안전성을 확보하는데 중요한 과제이다. 본 연구에서는 분출화염의 특성을 파악하여 건축물의 화재안전설계에 활용하기 위해 축소모형을 이용하여 화재실험을 실행하였다. 실험에서는 소규모 모형을 제작하고 가스버너를 화원으로 하여 개구부와 화원의 크기에 따른 분출열기류의 온도분포성상을 파악하였다.
채재근,설용건,한학수,강문식,조영일 연세대학교 산업기술연구소 1995 논문집 Vol.27 No.2
Studies have been made on Pt-Solid Polymer Electrolyte(SPE). Perfluorosulfonic acid polymer membranes (Dupont manufactured Nofion) were used as SPE. Pt was directly attached to both sides of the membrane by reductant penetrating method. We have analyzed characteristic properties of the fabricated Pt-SPE. As a result, Pt loadings, electricity and roughness factor showed maximum values at 1 ㏖/L NaBH₄. Optimum concentration of reducing agent of Pt-SPE preparation was found at 1㏖/L NaBH₄for 5 m㏖/L H₂PtCl??.