Measurement and Investigation of Combustible Properties of n-Heptane for Risk Assessment of Gasoline Tank

Dong-Myeong, Ha; Kee-Sin, Jeong; Sung-Jin, Lee; Yong-Sun, Cho; Myung-O, Yoon

Journal of Korean Institute of Fire Science and Engineering 2010;24(6):76-81.
Published online December 31, 2010.

가솔린탱크의 위험성평가를 위한 노말헵탄의 연소특성치 측정 및 고찰

하동명, 정기신, 이성진, 조용선, 윤명오

¹세명대학교 보건안전공학과²세명대학교 소방방재학과³세명대학교 임상병리학과⁴금성소방산업⁵서울시립대학교 재난과학과

Measurement and Investigation of Combustible Properties of n-Heptane for Risk Assessment of Gasoline Tank

Ha Dong-Myeong, Jeong Kee-Sin, Lee Sung-Jin, Cho Yong-Sun, Yoon Myung-O

요약

노말헵탄의 안전한 취급을 위해서 $25^{circ}C$에서 폭발한계와 폭발한계 온도의존성 그리고 하부인화점을 고찰하였다. 또한 발화지연시간에 의한 발화온도를 측정하였다. 공정의 안전을 위해서 노말헵탄의 폭발하한계는 1.0Vol%, 상한계는 7.0Vol%를 추천하였고, 하부인화점은 $-4^{circ}C$를 추천하였다. ASTM E659-78 장치를 사용하여 발화온도와 발화지연시간을 측정하였고, 여기서 측정된 최소자연발화온도는 $225^{circ}C$였다. 그리고 노말헵탄의 새로운 폭발한계 온도의존식을 제시하였으며, 제시된 식은 문헌값과 일치하였다.

Abstract

For the safe handling of n-heptane, the explosion limit at $25^{circ}C$, the temperature dependence of the explosion limits and the lower flash point were investigated. And AITs (auto-ignition temperatures) by ignition time delay for n-heptane were experimented. By using the literatures data, the lower and upper explosion limits of n-heptane recommended 1.0 Vol% and 7.0 Vol%, respectively. And the lower flash points of n-heptane recommended $-4^{circ}C$. This study measured relationship between the AITs and the ignition delay times by using ASTM E659-78 apparatus for n-heptane and the experimental AIT of n-hexane was $225^{circ}C$. The new equation for predicting the temperature dependence of the explosion limits of n-heptane is proposed. The values calculated by the proposed equations were a good agreement with the literature data.

Key Words: n-Heptane, Lower flash point, Explosion limit, Autoignition temperature (AIT), ASTM E659-78