| Summary: | 碩士 === 國立雲林科技大學 === 工業化學與災害防治研究所碩士班 === 90 === Runaway reaction or thermal explosion usually occurs in the exothermic chemical reaction system. It comes from the fact that some chemical reaction rates are sensitive to the temperature variation that must be accompanied by a self-heating reaction. In chemical industries catastrophes, so many thermal runaway incidents were cause by the organic peroxides owing to the peroxy function group,—O—O—, which is essentially unstable and active. The aim of this study is to investigate into evaluating thermal hazard associated with organic peroxide by Differential Scanning Calorimetry（DSC）and Thermal Screening Unit (TSU).
The DSC as the main tool for thermal hazard screening has numerous shortcomings, for instance high thermal interia factor and the absence of pressure data. With TSU experiment, pressure data accompanies with the temperature data and the sample sizes are large enough to be representative of large scale process.
The Arrhenius parameters of decomposition reaction of TBPBZ, Ea=155.626 kJ/mole and lnA=42.37 were calculated by applying the Kissinger’s method. The onset temperature is 90.9℃ and 90.29℃ by DSC and TSU, respectively. The time to maximum rate (TMRad) by DSC or TSU at 100℃ was only 5 minutes approximately. The simulated model was established to forecast thermal behavior of organic peroxide at heating condition. Preventable measures can be established by these parameters that both time and money can be saved, not to mention without loss of safety.
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