Authors:Kun-Yue Chen, Wei-Ting Chen, Chen-Wei Chiu, Tsung-Chih Wu, and Chi-Min Shu
its thermokinetic parameters measured by ventsizingpackage2 (VSP2). The results could be applied to simulate runaway reaction and thermal explosion of vessels containing 20 mass% MEKPO subjected to external fire scenarios. The simulation technique
Authors:Jian-Ming Wei, Mei-Li You, Yung-Chuan Chu, and Chi-Min Shu
the endothermic melting belongs to the quasi-AC type [ 4 ].
In this study, ventsizingpackage2 (VSP2) and thermal activity monitor III (TAM III) were used to analyze the thermokinetic parameters and safety indices. VSP2 is an adiabatic
Authors:Yu-Chuan Liang, Can-Yong Jhu, Sheng-Hung Wu, Sun-Ju Shen, and Chi-Min Shu
temperature ( T 0 ), heat of decomposition (Δ H d ), maximum temperature ( T max ), maximum pressure ( P max ), self-heating rate (d T d t −1 ), pressure rise rate (d P d t −1 ), etc., by using differential scanning calorimetry (DSC) and ventsizingpackage
Authors:Sheng-Hung Wu, Meng-Lung Lin, and Chi-Min Shu
rate (from 30 to 300 °C). Then, the T 0 can be determined by two ways in this new approach.
VSP2, a PC-controlled adiabatic calorimeter manufactured by Fauske & Associates, Inc., was
Authors:Lung-Chang Tsai, Jyun-Wei Chen, Hung-Yi Hou, Shang-Hao Liu, and Chi-Min Shu
The decomposition of organic peroxides by their relatively weak oxygen linkage and hydroperoxide radical in the presence of reaction solution is one of the thermal hazards for triggering a runaway reaction. Runaway incidents may occur in oxidation reactors, vacuum condensation reactors, tank lorries, or storage tanks. In NFPA 432 organic peroxides in NFPA 432 are classified as flammable. The exothermic behaviors of solid organic peroxides, dicumene peroxide, benzoyl peroxide, and lauroyl peroxide, were determined by differential scanning calorimetry (DSC), and vent sizing package 2 (VSP2). Relevant data detected by DSC provided thermal stability information, such as exothermic onset temperature (T0), maximum heat-releasing peak (Tmax), and heat of decomposition (ΔHd). VSP2 was used to perform the bench scale situation for pushing the expected or unexpected reaction to undergo runaway reaction. Onset temperature, maximum pressure, self-heating rate ((dT dt−1)max), and pressure-release rate ((dP dt−1)max) were therefore obtained and explained. These results are essentially crucial in process design for an inherently safer approach.
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.
and b fire and explosion by CHP
Ventsizingpackage2 (VSP2) is an adiabatic calorimeter that can be used to determine thermokinetics and safety parameters. This study was used to investigate thermal hazard and
Authors:Hung-Cheng Chou, Sheng-Hung Wu, Chung-Cheng Chiang, Jao-Jia Horng, Jen-Hao Chi, and Chi-Min Shu
) (non-isothermal calorimeter) and ventsizingpackage2 (VSP2) (adiabatic calorimeter) were used to evaluate the reaction behavior of CHP under various stirring rates. Stirring rate, self-accelerating decomposition temperature (SADT), exothermal onset
Authors:Sheng-Hung Wu, Hung-Cheng Chou, Ryh-Nan Pan, Yi-Hao Huang, Jao-Jia Horng, Jen-Hao Chi, and Chi-Min Shu
(Dewar test) [ 6 , 7 ]. Lin et al. [ 7 ] provide an SADT calculation method dependent on the Semenov explosion model. Therefore, Lin et al. use ventsizingpackage2 (VSP2) (AST method by TDG of UN) to determine the thermokinetics and to calculate SADT