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Thermal hazard evaluation of tert-butyl hydroperoxide mixed with four acids using calorimetric approaches |
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| Authors: | Hung-Cheng Chou Nan-Chi Chen Shu-Ting Hsu Chih-Hsing Wang Sheng-Hung Wu I-Jyh Wen Sun-Ju Shen Chi-Min Shu |
| Institution: | 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 2. Department of Sport Business Management, DaYeh University, 168, University Rd., Dacun, Changhua, 51591, Taiwan, ROC 7. Department of Tourism and Hospitality, TransWorld University, 1221, Zhennan Rd., Douliou, Yunlin, 640, Taiwan, ROC 3. Department of culinary arts, TransWorld University, 1221, Zhennan Rd., Douliou, Yunlin, 640, Taiwan, ROC 4. Department of Tourism and Eco-tourism, TransWorld University, 1221, Zhennan Rd.,, Douliou, Yunlin, 640, Taiwan, ROC 5. Department of Construction Engineering, National Yunlin University of Science and Technology, 123, University Rd., Sec. 3, Douliou, Yunlin, 64002, Taiwan, ROC 6. Department of Applied Geoinformatics, Chia Nan University of Pharmacy and Science, 60, Erren Rd., Rende, Tainan, 71710, Taiwan, ROC |
| Abstract: | Possessing thermal instability inherently, organic peroxides have caused many severe accidents in chemical industries all over the world. tert-Butyl hydroperoxide (TBHP) is usually used as initiator or oxidant because of its strong oxidizing ability in the chemical process. In this study, the thermal hazard analysis of TBHP mixed with various acids was investigated. Differential scanning calorimetry (DSC) and vent sizing package 2 were used to figure out the thermal runaway behaviors of TBHP. Thermokinetic parameters, such as exothermic onset temperature (T 0), maximum temperature (T max), and enthalpy (ΔH), were obtained from thermal curves. In addition, the activation energy (E a) and rate constant (k) were calculated by the Arrhenius equation. Therefore, the T 0 was determined to be 91.6 °C for exothermic reaction using DSC under 4 °C min?1 of heating rate. The E a for exothermic reaction was calculated to be 92.38 kJ mol?1 by DSC in this study. As far as loss prevention is concerned, thermokinetic parameters are crucial to the relevant processes in the chemical industries, particularly under process upsets. |
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