Journal of Thermal Analysis and Calorimetry

, Volume 109, Issue 3, pp 1373–1377 | Cite as

Thermal risk assessment and grading of chemicals with instantaneous power density

  • Daoxing Sun
  • Chuanxin Xie
  • Fan Zhang
  • Jing Gu
  • Jie Sun


The heat release behaviors of several chemical compounds were detected with C80 calorimeter. Furthermore, the thermodynamic and kinetic parameters of the chemicals were obtained based on the experimental data. Chemical thermal risk was simultaneously graded with combined use of instantaneous power density and the classification standard of thermal instability which was offered by the standard system for the identification of the hazards of materials for emergency response (NFPA704). The results show that the grading standard of thermal risk based on NFPA704 was reasonable and can be used as a preliminary thermal risk assessment for reaction hazards.


C80 calorimeter Instantaneous power density Thermal risk Risk assessment and prevention 

List of symbols


Initial reaction rate of reactant


Reaction rate of reactant (g mL−1 s−1)


Initial mass of reactant


Mass of reactant at time t


Pre-exponential factor of Arrhenius equation (s−1)


Activation energy (kJ mol−1)


Reaction heat of unit reactant (kJ mol−1)


Heat release (kJ mol−1)


Reaction time (min)


Temperature of system at time t (K)


Onset exothermic temperature


Reaction order


Constant of reaction rate


Gas constant (8.31415 J mol−1 K−1)


Overall heat flow (W)


Self-heat rate (K s−1)


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Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2011

Authors and Affiliations

  • Daoxing Sun
    • 1
  • Chuanxin Xie
    • 2
  • Fan Zhang
    • 2
  • Jing Gu
    • 1
    • 2
  • Jie Sun
    • 1
  1. 1.College of Environment and Safety EngineeringQingdao University of Science and TechnologyQingdaoChina
  2. 2.Sinopec Safety Engineering InstituteQingdaoChina

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