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Fire Sci. Eng. > Volume 29(2); 2015 > Article
Fire Science and Engineering 2015;29(2):39-43.
DOI:    Published online April 30, 2015.
Seta Flash 밀폐식 장치를 이용한 Water-Methanol과 Water-Ethanol계의 인화점 측정
하동명, 박상훈, 이성진
1세명대학교 보건안전공학과
2에스텍 E&C
3세명대학교 임상병리학과
The Measurement of Flash Point of Water-Methanol and Water-Ethanol Systems Using Seta Flash Closed Cup Tester
Ha Dong-Myeong, Park Sang Hun, Lee Sungjin
1Department of Occupational Health and Safety Engineering, Semyung University
3Department of Clinical Laboratory Science, Semyung University
인화점은 액체 혼합물의 화재와 폭발의 위험성을 특징짓는 주된 성질이다. 인화점은 가연성 액체에 불꽃이 가해졌을 때 점화가 발생하는 가장 낮은 온도로 정의된다. Seta flash 밀폐식 장치를 이용하여 이성분계 수용성 혼합물인 water-methanol계와 water-ethanol계의 인화점을 측정하였다. Wilson 식과 UNIQUAC 식과 같은 활동도 모델식을 활용한 방법을 이용하여 인화점을 계산하였다. 이 계산치와 라울의 법칙에 의한 계산치를 비교하였다. 그 결과, 활동도 계수 모델식에 의한 계산치가 라울의 법칙에 의한 계산치 보다 측정값에 보다 근접하였다.
The flash point is the major property to characterize fire and explosion hazard of liquid mixtures. The flash point is the lowest temperature at which a liquid gives off enough vapor to form a flammable air-vapor mixture. The flash points of two aqueous mixtures, water-methanol and water-ethanol, were measured using Seta flash closed cup tester. A prediction method based on activity coefficient models, Wilson and UNIQUAC equations, was used to calculate the flash point. The calculated flash points were compared to the results by the calculating method using Raoult's law. The calculated values based on activity coefficients models were found to be better than those based on the Raoult's law.
Key Words: Flash point, Seta flash closed cup, Water+methanol, Water+ethanol, Wilson, UNIQUAC

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