Application range of a differential-type adiabatic calorimeter in a thermal hazard evaluation

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  • SATO Yoshihiko
    Chemical Safety Research Group, National Institute of Occupational Safety and Health, Japan
  • ITAGAKI Haruhiko
    Chemical Safety Research Group, National Institute of Occupational Safety and Health, Japan

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  • 示差型断熱熱量計の熱的危険性評価に対する適用範囲の検討
  • シサガタ ダンネツ ネツリョウケイ ノ ネツテキ キケンセイ ヒョウカ ニ タイスル テキヨウ ハンイ ノ ケントウ

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In order to prevent accidents involving fire and explosions due to the accumulation of heat during the self-decomposition of stored chemical materials, it is important to understand the thermal behavior of stored materials under an adiabatic condition. Recently, a differential-type adiabatic calorimeter (DARC) has been developed. However, the application range of the DARC in a thermal hazard evaluation is not fully understood. Therefore, in order to understand the application range of a DARC in a thermal hazard evaluation, the thermal behavior of di-tert-butyl peroxide (DTBP)-toluene solution and DTBP decomposition were measured. The results measured by the DARC were compared with those of an Accelerating Rate Calorimeter (ARC). As a result, the DARC is considered to be effective in a thermal hazard evaluation for a small exothermic reaction of less than 100 J/g, which is difficult to evaluate by ARC. In contrast, a DARC should not be used for the thermal hazard evaluation of the material that has a large reaction heat and vapor pressure.

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