Investigation on the self-decomposition and explosion hazard of azo compounds |
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| Institution: | 1. Doctoral Program, Department of Safety, Health, and Environmental Engineering, National Yunlin University of Science and Technology (YunTech), 123, University Rd., Sec. 3, Douliou, Yunlin 64002, Taiwan, ROC;2. Department of Safety, Health, and Environmental Engineering, YunTech, 123, University Rd., Sec. 3, Douliou, Yunlin 64002, Taiwan, ROC;3. Department of Occupational Safety and Health, China Medical University, Taichung 404, Taiwan, ROC;4. Department of Occupational Safety and Health, Jen-Teh Junior College of Medicine, Nursing and Management, 1, Jen-Teh Rd., Houlong, Miaoli 35665, Taiwan, ROC;1. Department of Safety, Health and Environmental Engineering, Hung Kuang University, Taichung, Taiwan, ROC;2. Department of Ammunition Engineering and Explosion Technology, Anhui University of Science and Technology, Anhui, China;3. Graduate School of Engineering Science and Technology, National Yunlin University of Science and Technology (YunTech), Yunlin 64002, Taiwan, ROC;4. Department of Occupational Safety and Health, Jen-Teh Junior College of Medicine, Nursing and Management, Miaoli, Taiwan, ROC;5. Department of Safety, Health, and Environmental Engineering, YunTech, Douliou, Taiwan, ROC |
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| Abstract: | Azo compounds are self-reactive chemicals that violently produce flammable gases with heat release (i.e., an exothermic reaction). However, the explosion mechanism and ignition probability of azo compounds have not been clearly defined for storage or transportation. In this study, explosion scene analyses and various pyrolysis tests were performed to evaluate the thermal decomposition characteristics and explosion phenomena of azo compounds in a storage facility. The chemical debris collected from a fire scene was determined to be similar to the pyrolyzate of one of the tested azo compounds used by Py-GCMS. The minimum amounts of azo compounds, which could be ignited by self-decomposition heat, were calculated from the results of differential scanning calorimetrys and the heat transfer equation. The results were used to discuss a safety and response strategy for preventing the propagation of an explosion accident, namely a chemical backdraft. |
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| Keywords: | Self-reactive Thermal runaway Fire debris collection Py-GCMS Explosion mechanism |
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