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류시옥,이승철,송병수,황순묵 영남대학교 공업기술연구소 2001 工業技術硏究所論文集 Vol.29 No.1
Study on the ignition of methane fuel system highly diluted with argon was carried out in the temperature range of 1515∼1905K behind a reflected shock wave to investigate the rate coefficients for the reaction CH3+O2=CH3O+O. Ignition delay times were measured by monitoring the light absorption by methyl radical at ca. 214nm and pressure profiles. Computer modeling study of methane oxidation was also performed using a GRI_MECH, version 2.11 mechanism for sensitivity analysis and calculation of ignition delay times. The correlation of τp with the maximum heat release rate (dq/dt)max in the reaction zone was also investigated.
류시옥,Ryu, Si-Oak 대한한의정보학회 2008 大韓韓醫情報學會誌 Vol.14 No.2
Though modern medicine has taken rapid strides, varieties of intractable maladies and diseases go on increasing more and more. And so medical technologies and academic achievements related to diagnoses and prognoses are being carried on. As the progress of genetics, all sorts of diseases have proved to be hereditary. This makes efficient use of the prevention of diseases. According to Sasang-Constitution medicine, each person inherently possesses a unique constitution different from that of any other person. The shapes and sizes, temperaments and characters of people have enormous variations that must affect our health and happiness. Without understanding our particular constitution, we must fall into poor health and disease. The food and exercise that are good for one person's constitution may not be good for another. No standardized medicine can adequately deal with our individual variations. Only a system that can discern our different constitutional types has this capacity. This paper is to study Life-Regulating Science that has taken firm root in our culture from time immemorial, so that I suggest the methods of diagnoses and prognoses by using Life-Regulating Science. In the medical texts, psychological imbalances of Eum-Yang and Five Phases generate all kinds of diseases. Accordingly visceral manifestation and diseases as a future possibility may be known by the Four Pillars.
류시옥,이승철,김동현,피준현,이태진 한국공업화학회 2002 한국공업화학회 연구논문 초록집 Vol.2002 No.0
연소과정에서 생성되는 여러 가지 공해물질 중에서 PM10의 주요 공급원 중의 하나로서 인체에 직·간접적으로 유해한 영향을 미치는 soot의 발생을 억제하기 위한 방법을 개발하기 위하여 그 생성과 관련된 특성을 규명하기 위한 연구를 수행하였다. 일반적으로 아세틸렌은 soot의 중요한 precursor로서 탄화수소연료의 연소에 있어서 중요한 중간체이기 때문에 본 연구에서는 충격관과 레이저 흡수분광법을 사용하여 아세 틸렌이 열분해할 때 생성되는 soot의 형성 유발시간, 생성속도, 생성율 등을 측정하여 soot의 생성특성에 대한 속도론적 연구를 수행하였다. 본 연구를 통하여 현재까지 얻은 실험 데이터들을 분석한 결과. 유발시간은 세 가지 온도범위에서 특징적인 경향을 보였다. 2000 K 까지는 계속 감소하였고, 2000~2200 K 범위에서 최소값을, 그 이상 온도에서 약 2600 K 까지는 증가하다가 2600 K부터는 어느 일정한 값으로 접근 항을 알 수 있었다. 매연형성속도 또한 이와 비슷한 경향을 가졌으며, 압력이 높아질수록 최대값을 가지는 온도는 낮은 쪽으로 약간 이동함을 알 수 있었다.
류시옥,신권수,황순묵 대한화학회 2017 Bulletin of the Korean Chemical Society Vol.38 No.2
Rate coefficients of the title reactions, R1 (CH4 + O2 → HO2 + CH3) and R2 (HCO + O2 → HO2 + CO) were obtained over T = 1610 ~ 1810 K and T = 200 ~ 1760 K, respectively, and at ρ = 7.1 µmol/cm3. A lean CH4/O2/Ar mixture (0.1% CH4, ϕ = 0.02) was heated behind reflected shock waves and the temporal OH absorption profiles were measured using a laser absorption spectroscopy. Reaction rate coefficients were elucidated by matching the experimental profiles via optimization of k1 and k2 values in the reaction simulation. The rate coefficient expressions derived are k1 = 1.46 × 1014 exp (−26 210 K/T) cm3/mol/s, T = 1610 ~ 1810 K and k2 = 1.9 × 1012 T0.176 exp (−245 K/T) cm3/mol/s, T = 200 ~ 1760 K.
류시옥,박노국,이태진 한국공업화학회 2002 응용화학 Vol.6 No.1
Properties changes on the surface of desulfurization sorbents with reducing coal gas were investigated in this study. Deactivation of sorbents were observed from the result obtained in XRD and SEM/EDX analyses performed after a reduction of ZnO and a multi-cyclic test. It was presumed that the deactivation of sorbents might be caused decreasing active site on the surface of sorbents due to the migration of metal zinc and also by increasing of internal mass transfer resistance due to the sintering of methal zinc.