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Evaluation of thermal hazard for lauroyl peroxide by VSP2 and TAM III

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Abstract

When above certain temperature limits, lauroyl peroxide is an unstable material. If the thermal source cannot be properly governed during any stage in the preparation, manufacturing process, storage or transport, runaway reactions may inevitably be induced immediately. In this study, the influence of runaway reactions on its basic thermal characteristic was assessed by evaluating thermokinetic parameters, such as activation energy (E a) and frequency factor (A) by thermal activity monitor III (TAM III). This was achieved under five isothermal conditions of 50, 60, 70, 80, and 90 °C. Vent sizing package 2 (VSP2) was employed to determine the maximum pressure (P max), maximum temperature (T max ), maximum self-heating rate ((dT dt −1)max), maximum pressure rise rate ((dP dt −1)max), and isothermal time to maximum rate ((TMR)iso) under the worst case. Results of this study will be provided to relevant plants for adopting best practices in emergency response or accident control.

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Abbreviations

A :

Pre-exponential factor/m3 mol−1 s−1

C v :

Heat capacity under constant volume/J kg−1

E a :

Activation energy/kJ mol−1

f(α):

Kinetic function depends on conversions/dimensionless

k :

Reaction rate constant/variables

k 0 :

Frequency factor/(l/mol) n1 × (1/s)

m :

Total mass of reactant/g

n :

Reaction order/dimensionless

P :

Thermal power or heat production rate/W = J s−1

Q :

Heat/J

Q :

Heat flow/J g−1

SADT:

Self-accelerating decomposition temperature/°C

T :

Absolute temperature/K

T max :

Maximum temperature during overall reaction/°C

T 0 :

Exothermic onset temperature/°C

T f :

Final temperature/°C

T NR :

Temperature of no return/°C

t :

Time/sec

TMRiso :

Isothermal time to maximum rate/min, hr, or day

∆H d :

Heat of decomposition/J g−1

∆H iso :

Heat of decomposition under isothermal condition/J g−1

dα dt −1 :

Reaction rate/s−1

(dP dt −1)max :

Maximum pressure rise rate/bar min−1

(dT dt −1)max :

Maximum self-heating rate/°C min−1

Φ:

Thermal inertial/dimensionless

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Acknowledgements

The authors are grateful to the members of the Process Safety & Disaster Prevention Laboratory in Taiwan for technical assistance and for providing valuable comments. Furthermore, the authors deeply appreciate the financial support by National Science Council (NSC) of Taiwan, ROC.

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Authors and Affiliations

  1. Department of Safety, Health, and Environmental Engineering, Hungkuang University, 34 Chung-Chie Rd., Shalu, Taichung, 433, Taiwan, ROC

    Jian-Ming Wei

  2. Doctoral Program, Graduate School of Engineering Science and Technology, National Yunlin University of Science and Technology (NYUST), 123, University Rd., Sec. 3, Douliou, Yunlin, 64002, Taiwan, ROC

    Jian-Ming Wei & Yung-Chuan Chu

  3. Department of General Education Center, Chienkuo Technology University, 1, Chieh-Shou N. Rd., Changhua, 50094, Taiwan, ROC

    Mei-Li You

  4. Process Safety and Disaster Prevention Laboratory, Department of Safety, Health, and Environmental Engineering, NYUST, 123, University Rd., Sec. 3, Douliou, Yunlin, 64002, Taiwan, ROC

    Chi-Min Shu

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  1. Jian-Ming Wei
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  2. Mei-Li You
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Correspondence to Mei-Li You.

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Wei, JM., You, ML., Chu, YC. et al. Evaluation of thermal hazard for lauroyl peroxide by VSP2 and TAM III. J Therm Anal Calorim 109, 1237–1243 (2012). https://doi.org/10.1007/s10973-012-2350-2

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