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Journal of Korean Institute of Fire Science and Engineering 2007;21(2):48-53.
Published online June 30, 2007.
개방식 장치를 이용한 water+2-propanol계의 인화점 측정 및 예측
하동명, 이성진
1세명대학교 보건안전공학과2세명대학교 임상병리학과
The Measurement and Prediction of the Flash Points for the Water+2-Propanol System Using Open-Cup Apparatus
Ha Dong-Myeong, Lee Sung-Jin
혼합물의 인화점에 대한 지식은 산업 현장에서 화재화재 예방 및 방호를 위해서 매우 중요하다. 본 연구에서는 water+2-propanol 계의 인화점을 Tag 개방식 장치(ASTM D1310-86)를 이용하여 측정하였다. 실험값은 Raoult의 법칙, Van Laar 모델식과 NRTL 모델식에 의해 계산된 값들과 비교되었다. 그 결과, Van Laar 모델식과 NRTL(non random two liquids) 모델식에 의한 예측값이 Rauolt의 법칙에 의한 예측값 보다 실험값에 더욱 근접하였다. 이는 water+2-propanol 계와 같은 비이상용액의 활동도 계수값을, Van Laar 및 NRTL 모델식이 Raoult의 법칙보다 정확하게 계산하기 때문이다. 또한, Van Laar 모델식의 실험값에 대한 모사성이 NRTL 모델식의 그것 보다 우수하였다.
The knowledge of the flash point of the mixtures is very important for prevention and protection of fire in the industrial field. The flash points for the water+2-propanol system were measured by using Tag open-cup apparatus(ASTM D1310-86). The experimental data were compared with the values calculated by the Raoult's law, the Van Laar equation and the NRTL(Non Random Two Liquids) equation. The calculated values based on the Van Laar and NRTL equations were found to be better than those based on the Raoult's law. It was concluded that Van Laar and NRTL equations were more effective than the Raoult' law at describing the activity coefficients for non-ideal solution such as the water+2-propanol system. And the predictive curve of the flash point prediction model based on the Van Law equation described the experimentally-derived data more effectively than was the case when the prediction model was based upon the NRTL equation.
Key Words: Flash point, Tag open-cup apparatus, Water+2-Propanol system, Van Laar equation, NRTL equation

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