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its thermokinetic parameters measured by vent sizing package 2 (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

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the endothermic melting belongs to the quasi-AC type [ 4 ]. In this study, vent sizing package 2 (VSP2) and thermal activity monitor III (TAM III) were used to analyze the thermokinetic parameters and safety indices. VSP2 is an adiabatic

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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 vent sizing package

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c The peak temperature of the second peak Vent sizing package 2 (VSP2) VSP2 is a computer-controlled adiabatic calorimeter system manufactured by

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rate (from 30 to 300 °C). Then, the T 0 can be determined by two ways in this new approach. Vent sizing package 2 (VSP2) VSP2, a PC-controlled adiabatic calorimeter manufactured by Fauske & Associates, Inc., was

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Abstract

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 (T 0), maximum heat-releasing peak (T max), and heat of decomposition (ΔH d). 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.

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Abstract  

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 (T 0), heat of decomposition (ΔH d), and exothermic peak temperature (T p). Vent sizing package 2 (VSP2) was employed to receive the maximum pressure (P max), the maximum temperature (T max), 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.

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and b fire and explosion by CHP Vent sizing package 2 (VSP2) is an adiabatic calorimeter that can be used to determine thermokinetics and safety parameters. This study was used to investigate thermal hazard and

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) (non-isothermal calorimeter) and vent sizing package 2 (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

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Journal of Thermal Analysis and Calorimetry
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 vent sizing package 2 (VSP2) (AST method by TDG of UN) to determine the thermokinetics and to calculate SADT

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