An evaluation on thermokinetic parameters for hydrogen peroxide at various concentrations by DSC
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Information about the kinetics and thermal decomposition of hydrogen peroxide (H2O2) has been required for safety reasons, due to its broad applications in many chemical industries. To determine the inherent hazards during H2O2 manufacturing, transportation, disposal, usage, and so on, this study deliberately selected various H2O2 concentrations and analyzed them by differential scanning calorimetry (DSC). In addition, thermokinetic parameters were not only established for each of these reactions, but also aimed at comprehensive, kinetic models with various tests conducted at different heating rates.
To build up a comprehensive kinetic model, various tests were conducted by heating rates of 1, 2, 4, 10°C min–1, respectively. According to dynamic DSC tests, the experimental curves show that H2O2 decomposition has one exothermic peak and may start to decompose under 47–81°C. The total heat of decomposition is about 192–1079 J g–1. Not only can these results prevent accidents caused by H2O2 during storage and transportation, but also assess its inherent hazards and thereby design procedures for emergency response while runaway reactions occurring.
KeywordsDSC H2O2 kinetics runaway reactions thermal decomposition thermokinetic parameters
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