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Methyl Isobutyl Ketone 의 촉매소각에 대한 연구
김진식,안화승 ( J . S . Kim,W . S . Ahn ) 한국공업화학회 1995 공업화학 Vol.6 No.4
대표적인 귀금속 및 전이금속 산화물 촉매들을 제조하여 Methyl Isobuthyl Ketone의 연소반응에 대한 활성도를 비교하였다. 이때 Pd/Al₂O₃와 CuCr₂O₄/Al₂O₃의 활성도가 특히 우수하였으며, Co₃O₄를 제외한 나머지의 촉매들은 고온에서 장시간동안 활성을 유지하였다. 403-443 K 범위에서 적분형 반응기를 이용하여 kinetics실험을 수행한 결과, Pd와 CuCr₂O₄의 활성화 에너지는 9.2 및 11.4Kcal/mol이었다. Monolith type 촉매전환장치의 운행조건 및 설계변수의 변화에 따른 정상상태 response를 수학적 모델을 이용하여 계산한 결과 실제공정의 조건에서 대부분의 경우 연소과정이 물질전달 지배영역에서 진행됨을 알 수 있었다. 반응물의 높은 유입온도와 농도 및 낮은 유입속도에서 높은 전환율을 얻을 수 있었으며, cell density가 클수록 유기용매의 제거성능이 우수하였다. 또한 channel의 크기와 모양이 전환율 및 온도분포에 중요한 영향을 미침을 알 수 있었다. Activities of precious metals and selected transition metal oxide catalysts for methyl isobuthyl ketone(MIBK) combustion were measured, and among the catalysts tested, Pd/Al₂O₃ and CuCr₂O₄/Al₂O₃ were found most effective. Kinetic experiments were conducted using an integral reactor for Pd and CuCr₂O₄ catalysts. In the temperature range of 403-443 K, activation energies for Pd and CuCr₂O₄ catalyst on MIBK oxidation were estimated to be 9.2 and 11.4Kcal/gmol, respectively. Steady state responses of a monolith catalytic incinerator to changes in operating conditions or monolith design parameters have been examined on the basis of one dimensional mathematical model. Calculations showed that, under typical operating conditions, the catalyst system is operating under mass transfer controlled conditions. Higher conversion efficiencies were obtained with higher inlet temperatures and higher MIBK concentrations, and with low gas velocities. Monoliths having higher channel densities offer superior performances. It was implicated that channel size and shape can have significant influences on the conversion and temperature profiles along the monolith channels.
김진식(J. S. Kim),박정훈(J. H. Park),임홍재(H. J. Yim) 한국정밀공학회 2004 한국정밀공학회 학술발표대회 논문집 Vol.2004 No.10월
This paper presents the dynamic analysis method for an electromechanical system. The engineer has at his disposal a variety of software simulation tools. However, difficulties arise when the study of the behavior of complex electromechanical systems in combination with coupling element is required. Typical examples of such systems are machines for factory automation, home automation, and office automation. Dynamic systems analysis packages or electronic systems analysis packages offer the restrictive to simulate these mixed systems such electromechanical product. Electronic circuit analysis algorithm is easily incorporated into a multi-body dynamics analysis algorithm. The governing equation of electronic circuit is formulated as a differential algebraic equation form including both electrical and mechanical variables and is simultaneously solved in every time step. This analysis method clearly demonstrates the application potential for mixed electromechanical simulation.
임재성(J.S. Lim),신백균(P.K. Shin),남광우(K.Y. Nam),김진식(J.S. Kim),황명환(M.H. Hwang),김종택(J.T. Kim),이은학(Y.H. Lee),강대하(D.H. Kang) 대한전기학회 2006 대한전기학회 학술대회 논문집 Vol.2006 No.7
In this paper, poly methyl methacrylate thin films were deposited on a ITO glass substrate using a plasma polymerization technique. In order to investigate the influence of the plasma coupling method and plasma conditions on the plasma polymerized poly methyl methacrylate (ppMMA) thin film properties, inductively coupled (ICP) and capacitively coupled plasma (CCP) were used to generate the plasma and the plasma parameters were varied. Molecular structures of the ppMMAs were investigated using a Fourier Transform Infrared (IT-IR) spectroscopy. Dielectric constants of the ppMMA thin films were investigated using a impedance anaiyzer (HP4192A, LF Impedance Analyzer). Current-Voltage (I-V) characteristics of the ppMMA thin films were investigated using a source measurement unit (SMU : Keithley 2400). Relationship between the plasma coupling technique/process parameter and ppMMA thin films properties were investigated.