Authors:Sheng-Hung Wu, Jen-Hao Chi, Chun-Chin Huang, Nung-Kai Lin, Jiou-Jhu Peng, and Chi-Min Shu
Hydrogen peroxide (H2O2), historically, due to its broad applications in the chemical industries, has caused many serious fires and explosions worldwide.
Its thermal hazards may also be incurred by an incompatible reaction with other chemical materials, and a runaway reaction
may be induced in the last stage. This study applied thermal analytical methods to explore the H2O2 leading to thermal accidents by incompatibility and to discuss what might be formed by the upset situations. In this study,
the thermal hazard analyses were conducted with various solvents, propanone (CH3COCH3), Fe2O3, FeSO4, H2SO4, HCl, HNO3, H3PO4, NaOH, LiOH, and KOH which were deliberately selected to individually mix with H2O2 for investigating the degree of hazard. Differential scanning calorimetry (DSC) was employed to evaluate the thermal hazard
of H2O2-mixed ten chemicals. The results indicated that H2O2 is highly hazardous while separately mixed with ten materials, as a potential contaminant. Fire and explosion hazards could
be successfully reduced if the safety-related data are suitably imbedded into manufacturing processes.
Authors:Chun-Chin Huang, Jiou-Jhu Peng, Sheng-Hung Wu, Hung-Yi Hou, Mei-Li You, and Chi-Min Shu
Cumene hydroperoxide (CHP) being catalyzed by acid is one of the crucial processes for producing phenol and acetone globally.
However, it is thermally unstable to the runaway reaction readily. In this study, various concentrations of phenol and acetone
were added into CHP for determination of thermal hazards. Differential scanning calorimetry (DSC) tests were used to obtain
the parameters of exothermic behaviors under dynamic screening. The parameters included exothermic onset temperature (T0), heat of decomposition (ΔHd), and exothermic peak temperature (Tp). Vent sizing package 2 (VSP2) was employed to receive the maximum pressure (Pmax), the maximum temperature (Tmax), the self-heating rate (dT/dt), maximum pressure rise rate ((dP/dt)max), and adiabatic time to maximum rate ((TMR)ad) under the worst case. Finally, a procedure for predicting thermal hazard data was developed. The results revealed that phenol
and acetone sharply caused a exothermic reaction of CHP. As a result, phenol and acetone are important indicators that may
cause a thermal hazard in the manufacturing process.