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Isothermal hazards evaluation of benzoyl peroxide mixed with benzoic acid via TAM III test

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Abstract

Isothermal microcalorimetry can be used to investigate the thermokinetic parameters for reactive mechanisms. Benzoyl peroxide (BPO), a typical organic peroxide, undergoes an autocatalytic reaction under isothermal decomposition. It requires intrinsically safer design of preparation, manufacturing, transportation, storage, and even disposal. The scope of this study was to describe the exothermic reaction and reaction model of BPO and mixed with benzoic acid by the thermal activity monitor III (TAM III). The results showed the isothermal kinetic parameters, such as activation energy (E a), frequency factor (A), heat of decomposition (ΔH d), and time to maximum rate under isothermal conditions (TMR iso), which were necessary and useful to insure safe storage or transportation for self-reactive substances applied in the process industries.

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Abbreviations

A :

Reactant

C dT/dt :

Rate of heat accumulation or depletion (kJ kg−1 min−1)

dC/dt :

Reaction rate (mol L−1 s−1)

dQ/dt :

Heat production rate (kJ kg−1 min−1)

f(c):

Kinetic function depends on conversions

g :

Seebeck coefficient (V K−1)

k :

Reaction rate constant (min−1)

k a :

Heat conductance (W K−1)

P :

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

Q :

Heat of decomposition (J)

Q max :

Maximum peak power at time t (W g−1)

R :

Product

T :

Temperature of sample (K)

TMR iso :

Time to maximum rate under isothermal conditions (hr)

T 0 :

Temperature of surroundings (K)

t :

Time (s)

U :

Heat transfer coefficient (kJ min−1 m−2 K−1)

v :

Rate of change (mol s−1)

ΔH :

Enthalpy change (J g−1)

∆H d :

Heat of decomposition (J g−1)

Φ :

Slope of the heat flow time curve (W = J s−1)

τ :

Time constant obtained from dynamic calibration (s)

ε :

Calibration constant (W V−1)

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Acknowledgments

The authors are indebted to the donors of the National Science Council (NSC) in Taiwan under the contract number NSC-99-2221-E-224-029-MY3 for financial support.

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Authors and Affiliations

  1. 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

    Tien-Szu Wang & Chi-Min Shu

  2. Department of Safety, Health, and Environmental Engineering, NYUST, 123, University Rd., Sec. 3, Douliou, Yunlin, 64002, Taiwan, ROC

    Shang-Hao Liu

  3. State Key Laboratory of Explosion Science & Technology, Beijing Institute of Technology, 5 South Zhongguancun Street, Haidian, Beijing, 100081, China

    Xin-Ming Qian

  4. Department of General Education Center, Chienkuo Technology University, 1, Chiehshou North Road, Changhua, 50094, Taiwan, ROC

    Mei-Li You

  5. Department of Safety Health and Environmental Engineering, Hungkuang University, 1018, Taiwan Boulevard, Sec. 6, Shalu, Taichung, 43302, Taiwan, ROC

    Wei-Lung Chou

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  1. Tien-Szu Wang
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  2. Shang-Hao Liu
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  3. Xin-Ming Qian
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  6. Chi-Min Shu
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Correspondence to Chi-Min Shu.

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Wang, TS., Liu, SH., Qian, XM. et al. Isothermal hazards evaluation of benzoyl peroxide mixed with benzoic acid via TAM III test. J Therm Anal Calorim 113, 1625–1631 (2013). https://doi.org/10.1007/s10973-013-3020-8

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  • DOI: https://doi.org/10.1007/s10973-013-3020-8

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