노말에틸아닐린의 화재 및 폭발 특성치의 측정 및 예측

하동명,Ha, Dong-Myeong 한국화학공학회 2018 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.56 No.4

For process safety, fire and explosion characteristics of combustible materials handled at industrial fields must be available. The combustion properties for the prevention of the accidents in the work place are flash point, fire point, explosion limit, and autoignition temperature (AIT) etc.. However, the combustion properties suggested in the Material Safety Data Sheet (MSDS) are presented differently according to the literatures. The accurate combustion properties are necessary to safely treatment, transportation and handling of flammable substances. In the chemical industries, n-ethylaniline which is widely used as a raw material of intermediate products and rubber chemicals was selected. For safe handling of n-ethyl aniline, the flash point, the fire point and the AIT were measured. The lower explosion limit (LEL)of n-ethylaniline was calculated using the lower flash point obtained in the experiment. The flash points of n- ethylaniline by using the Setaflash and Pensky-Martens closed-cup testers measured $77^{\circ}C$ and $82^{\circ}C$, respectively. The flash points of n-ethylaniline using the Tag and Cleveland open cup testers are measured $85^{\circ}C$ and $92^{\circ}C$, respectively. The AIT of the measured n-ethyl aniline by the ASTM E659 apparatus was measured at $396^{\circ}C$. The LEL of n-ethylaniline measured by Setaflash closed-cup tester at $77^{\circ}C$ was calculated to be 1.02 vol%. In this study, it was possible to predict the LEL by using the lower flash point of n-ethylaniline measured by closed-cup tester. The relationship between the ignition temperature and the ignition delay time of the n-ethylaniline proposed in this study makes it possible to predict the ignition delay time at different ignition temperatures.

The Flash Point Measurement for Binary Flammable Mixture

하동명,이성진 한국가스학회 2014 한국가스학회지 Vol.18 No.5

The flash point is the major physical property used to characterize the fire hazard of flammableliquid solutions. In the present study, the main focus is on measuring and estimating the flash points for binaryflammable mixture. The flash points for n-propanol+propionic acid were measured by Seta flash closed cupapparatus. The experimental data were correlated with the van Laar and NRTL equations through theoptimization method. The results estimated by these correlations were compared with the values calculated bythe method based on Raoult’s law. The optimization method were found to be better than the method based onthe Raoult’s law.

파라핀족과 올레핀족 탄화수소 화합물의 폭발상한계의 추산

하동명,이수경 社)韓國火災 ·消防學會 1996 한국화재소방학회논문지 Vol.10 No.2

An estimation methodology, based on statistics and numerical method, has been developed for estimating the upper explosive limits(UEL) of paraffinic and olefinic hydrocarbon compounds. With proposed method, the UEL has been calculated for 24 paraffinic and 10 olefinic hydrocarbon compounds. The estimated the UEL agree with the experimental values within a few percent. A comparisons with four other methods avaiable in the literature are also presented. It is hoped eventually that this method will permit estimation of the UEL with improved accuracy and broader application for other compounds.

최소발화에너지와 온도의 관계

하동명 (社團法人)韓國火災·消防學會 1997 한국화재소방학회논문지 Vol.11 No.2

열량과 열발화이론의 개념을 근거로 최소발화에너지의 온도의존성에 대한 이론적 고찰을 시도하였다. 이 이론적 근거를 바탕으로 통계학적 및 수학적 방법을 기초로 하여 온도 변화에 의한 최소발화에너지를 예측하는 식을 제시하였다. 본 연구에서 제시한 방법론에 의해 탄화수소인 프로판과 노말펜탄에 적용한 결과 제시한 예측식과 문헌값이 거의 일치함을 알 수 있다. Attempts are being made to investigate temperatures dependence of minimum ignition energy(MIE) based on concept of quantity of heat and thermal ignition theory. Regression equations for predicting MIE by means of temperature variations on the basis of statistical and mathematical methods are proposed. This study is undertaken to learn what proposed method is satisfactory hydrocarbons (propane and pentane). The proposed method has been tested and compared sucessfully with previously reported data in various journal.

Tag 개방식 장치를 이용한 tert-Pentanol+n-Decane 계의 하부인화점 측정

하동명,이성진 한국가스학회 2012 한국가스학회지 Vol.16 No.5

인화점은 공기 속 가연성 증기의 농도가 연소하한계(lower flammability limit)에 도달할 때의 최저 온도이며, 산업현장에서 사용하는 물질들의 화재와 폭발의 위험성을 결정하는 중요한 물성치이다. 단일 성분의 인화점 정보는 여러 문헌에서 얻을 수 있으나, 이성분계 혼합물의 인화점은 충분히 제공되어 있지 않다. 본 연구에서는tert-pentanol+n-decanel 계의 인화점을 Tag 개방식 장치를 이용하여 측정하였다. 실험값은 Raoult의 법칙과, Wilson 식과 NRTL 식을 활용한 최적화 기법에 의해 계산된 값들과 비교되었다. 최적화 기법에 의한 계산값이 Rauolt의법칙에 의한 계산값 보다 실험값에 더욱 근접하였다 The flash point the lowest temperature at which the concentration of vapor of the substance in the air reaches the lower flammability limit(LFL), and is one of the most important physical properties used to determine the potential for fire and explosion hazards of industrial materials. The most published flash point data was for pure components and the flash points of the binary solutions that have flammable components, appear to be scarce in the literature. In the present study, the flash points of tert-pentanol+n-decane system were measured by Tag open-cup tester. The measured data were compared with the values calculated by the Raoult's law and the optimization methods based on the Wilson and NRTL equations. The calculated values by optimization methods were found to be better than those based on the Raoult's law.

가연성가스와 액체의 폭발 현상 및 위험성 예측

하동명,Ha, Dong-Myeong 대한산업안전협회 2000 안전기술 Vol.33 No.-

탄화수소 및 할로겐화탄화수소의 최소산소농도(MOC)의 예측

하동명,정기신 한국화재소방학회 2005 한국화재소방학회논문지 Vol.19 No.2

An accurate knowledge of the minimum oxygen concentration(MOC) is important in developing appropriate prevention and control measures in industrial fire protection. In this study, by using the literature data and RSM(response surface methodology), the new equations for predicting the MOC are proposed. The A.A.P.E.(average absolute percent error) and the A.A.D.(average absolute deviation) of the reported and the calculated MOC for hydrocarbons were 3.48% and 0.37 vol%, respectively and the correlation coefficient was 0.919. The A.A.P.E and the A.A.D of the reported and the calculated MOC for halogenated hydrocarbons and hydrocarbons were 5.06% and 0.59 vol%, and the correlation coefficient was 0.938. The values calculated by the proposed equations were in good agreement with the literature data. Therefore, it is expected that this proposed equations will support the use of the research for other flammable substances. 최소산소농도의 정확한 지식은 산업화재를 적절하게 예방하고, 제어하는데 중요하다. 본 연구에서는 Response Surface Methodology(RSM) 방법과 문헌자료를 사용하여 최소산소농도(MOC)를 예측하는 식을 제시하였다. 탄화수소에 대한 예측 식에 의해 계산된 최소산소농도와 문헌값의 A.A.P.E.(average absolute percent error)는 3.48%, A.A.D.(average absolute deviation)는 0.57vol% 그리고 상관계수는 0.919이다. 탄화수소와 할로겐화탄화수소를 포함한 경우 예측값과 문헌값의 A.A.P.E.는 5.06%, A.A.D.는 0.59vol%, 상관계수는 0.938이다. 제시한 예측식에 의한 계산값은 문헌값과 일치하였다. 따라서 본 연구에서 제시된 식이 다른 가연성물질의 최소산소농도 연구에도 이용되기를 기대한다.

메탄가스의 화재 및 폭발 위험성 평가

하동명,Ha, Dong-Myeong 대한산업안전협회 2001 안전기술 Vol.46 No.-

연구실 독성가스 현황과 안전관리에 관한 연구

하동명,이성진,박상훈,장선연,한진석,박진현,변문주 한국화재소방학회 2014 한국화재소방학회 학술대회 논문집 Vol.2014 No.추계

건축물화재의 위험성 평가를 위한 내장재의 Flashover 시간의 예측

하동명,Ha, Dong-Myeong 한국건설안전협회 2008 建設 安全技術 Vol.46 No.-