http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
양현수,김영호 한국화학공학회 1989 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.27 No.1
국내 산청 및 하등지역에 폐자원으로 남아 있는 규산염 광물중 pink-C급 고령토(약 2%의 Fe₂O₃ 함유)를 탄소-염화반응할 때 알카리 금속(IA), 알카리 토 금속(IIA) 및 기타 금속 계열의 염화물 첨가가 반응속도에 미치는 영향을 실험적으로 관찰하였다. 알카리 금속계 염화물 즉, KCl, NaCl, LiCl은 알카리 토 금속 및 기타금속계 염화물에 비하여 고령토에 함유된 Si, Al, Fe 성분의 염화속도를 현저하게 증가시키는 촉매효과를 나타내었으며, 이중에서 KCl이 가장 우수한 촉매효과가 있었다. 반응온도를 925 K로 유지할 때 촉매를 사용하지 않은 고령토만의 염화반응에서는 약 40%의 Al 성분이 전환되었음에 비하여 KCl을 사용할 때에는 거의 100%의 전환이 이루어졌다. 최대의 전환을 만드는 반응 온도는 사용한 촉매에 따라 다르게 나타났으며 KCl을 사용할 때에 약 950K에서 최대 전환을 보이고 있으며 NaCl인 경우에는 이보다 낮은 935 K로 나타났다. 반응시간에 따르는 Al 성분과 Si 성분의 염화 전환을 보면 KCl을 사용한 경우 반응시간이 증가함에 따라 Al/Si 비율은 반응이 완결할 때까지 거의 같은 비율로 증가하지만(Al 성분과 Si 성분의 선택적 염화화가 유사함), NaCl을 사용한 경우에는 Al/Si 비율은 매우 빠른 속도로 증가하였다(반응시간이 작을수록 Al 성분이 Si 성분에 비하여 선택성이 우수함). Carbo-chlorination of Korean kaolinic clay of pink-c grade deposited in Sanchung and Hadong areas was studied to examine the effect of alkali metallic-, alkaline earth metallic- and other metallic-chlorides on the reaction rate. Alkali metallic-chloride like KCl, NaCl and LiCl enhanced the chlorination of silicon, aluminum and iron portions in clay significantly greater than alkaline earth metallic- and other metallic-chlorides. At a constant temperature of 925 K, the chlorination of the aluminum with KCl was completed when only 40% conversion was made in the chlorination of clay in the absence of catalyst. The temperature providing maximum conversion of aluminum was slightly different from catalyst. The addition of KCl produced maximum conversion at 950K, whereas 935K with NaCl. During the reaction with KCl present, the Al/Si conversion ratio increased portionally (selectivities of aluminum and silicon are similar), and the Al/Si conversion ratio in the presence of NaCl was very high at a shorter reaction time(selectivity of aluminum is greater than that of silicon).
The Study on the Impact CFRP Composite Circular Structures of Collapse Characteristics
양현수 한국기계기술학회 2013 한국기계기술학회지 Vol.15 No.3
Because of the inherent flexibility in their design for improved material properties, composites have wide applications in aerospace vehicles and automobiles. The purpose of this study is to investigate the energy absorption characteristics of CFRP(Carbon Fiber Reinforced Plastics)tubes on static and impact tests. Static compression tests have been carried out using the static testing machine(Shin-gang buckling testing machine)and impact compression tests have been carried out using the vertical crushing testing machine. When such tubes were subjected to crushing loads, the response is complex and depends on the interaction between the different mechanisms that control the crushing process. The collapse characteristics and energy absorption were examined. Trigger and interlaminar number affect the energy absorption capability of CFRP tubes.
양현수 忠南大學校 産業技術硏究所 1986 산업기술연구논문집 Vol.1 No.2
Coal is represented as a collection of various functional groups including aromatic rings, aliphatic chains and bridges, and other heterocyclic compounds. Accordingly, the behavior of coal pyrolysis is highly complex and requires a more systematic study thermochemically and phenomenologically. This study is designed to be a preparatory step for a mathematical analysis which helps to interrelate kinetics models of coal pyrolysis and experimental data obtained with the reaction conditions of reduced pressure and high heating velocity. The kinetics models to be used are formulated and qualitatively represented in terms of phenomenological and thermochemical approaches.