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팔라듐 담지 촉매를 이용한 HCFC - 142 b 수소첨가분해반응
이경훈,서경원,목영일,박건유,안병성 한국공업화학회 1999 응용화학 Vol.3 No.1
In this study, hydrodechlorination of 1-chloro-1,1-difluoroethane (HCFC-l42b) has been performed over palladium on activated carbon catalysts. Activated carbon was, prior to catalysts preparation, washed with sodium hydroxide and hydrofluoric acid and/or hydrochloric acid to remove the impurities. In this experiment effects of the H₂ reduction time and mloe ratio of H₂ to HCFC-l42b on catalyst activities were investigated. The results showed that the conversion of HCFC-l42b products were more than 20% and the selectivities to 1,1-difluoroethane(HFC-l52a) in the product gas was 90% and especially, when mole ratio was 4, conversion was 31.5%, and selectivity to the HFC-l52a was 95.5%, whereas ethane was very low.
金炯遠,睦榮珪,黃龍燮,柳建一,郭鎭榮 최신의학사 1971 最新醫學 Vol.14 No.12
The Wilkie's syndrome is an unusual form of duodenal obstruction due to compression of the distal duodenum between the aorta and the superior mesenteric artery. Authors report one case of duodenal obstruction due to superior mesenteric syndrome (Wilkie's syndrome) in 16-years old male student. A well development under nourished thin 16-years old male was admitted with abrupt onset of colicky abdominal pain and intermittent vomiting for two days, who no specific past, history except postprandial fullness. The diagnosis of Wilkie's syndrome was made under radiologic findings and above chief complaints. The operative treatment was performed by side to side anastomosis of- the jejunum to the dilated duodenum. We report a case of Wilkie's syndrome with brief review of several literature.
소형 근거리 이동용 전기자동차(NEV)용 10㎾급 BLAC 구동인버터 개발
이용균(Y.K LEE),김은경(E.K KIM),김선일(S.I KIM),홍찬희(C.H Hong),방량(Liang Fang),목형수(H.S Mok) 전력전자학회 2011 전력전자학술대회 논문집 Vol.2011 No.7
This paper deals with 10㎾ BLAC drive inverter for neighborhood electric vehicle. First it introduces about hardware structure of inverter driven using 72volts battery. Then it explains motor control algorithm. Also performance of BLAC drive system is confirmed through experiments.
목인균,서정윤,김종보,Mok I. K.,Seo J. Y.,Kim C. B. 대한설비공학회 1986 설비저널 Vol.15 No.4
Numerical solutions of two-dimensional, steady, and natural are investigated in a confined rectangular cavity with porous media. The saturated fluid is bounded by two isothermal vertical walls at different temperatures and two adiabatic horizontal walls. Governing equations are numerically solved by finite difference method with the up wind scheme. Distributions of streamline and temperature we. predicted for aspect ratios ranging from 0.1 to 1.0, Rayleigh numbers 50 to $10^4$, and tilt angles $0^{\circ}\;to\;60^{\circ}$. Representative plots of temperature and velocity field according to tilt angle are presented. The effects of aspect ratio, Rayleigh number, and tilt angle on local and average Nusselt numbers are obtained. The optimum conditions for maximum Nusselt number are also presented with tilt angles.