Measurements of Autoigniton Temperature(AIT) and Time Lag of BTX(Benzene, Toluene, Xylenes)

BTX(Benzene, Toluene, Xylenes)의 자연발화온도와 발화지연시간의 측정

  • Ha, Dong-Myeong (Department of Occupational Health and Safety Engineering, Semyung University)
  • 하동명 (세명대학교 보건안전공학과)
  • Published : 2006.06.30

Abstract

The AITs(autoignition temperatures) describe the minimum temperature to which a substance must be heated, without the application of a flame or spark, which will cause that substance to ignite. The AITs are often used as a factor in determining the upper temperature limit for processing operations and conditions for handling, storage and transportation, and in determining potential fire hazard from accidental contact with hot surfaces. The measurement AITs are dependent upon many factors, namely initial temperature, pressure, volume, fuel/air stoichiometry, catalyst material, concentration of vapor, time lag. Therefore, the AITs reported by different ignition conditions are sometimes significantly different. This study measured the AITs of benzene, toluene and xylene isomers from time lag using AS1M E659-78 apparatus. The experimental ignition delay times were a good agreement with the calculated ignition delay times by the proposed equations wtih a few A.A.D.(average absolute deviation). Also The experimental AITs of benzene, toluene, o-xylene, m-xylene and p-xylene were $583^{\circ}C,\;547^{\circ}C,\;480^{\circ}C,\;587^{\circ}C,\;and\;557^{\circ}C$, respectively.

Keywords

AIT(autoignition temperatures);time lag;ASTM E659-78;benzene;toluene;xylene isomers

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