In addition to polypropylene, acrylonitrile, and carbonyl alcohol, propylene oxide is the fourth major derivative among propylene derivatives and one of the important basic organic chemicals. A thermal stability test of catalyst, methanol, and hydrogen peroxide (H 2 O 2 ) was conducted via differential scanning calorimetry (DSC). Propylene epoxidation with H 2 O 2 over catalyst, methanol, and propylene evenly mixed by specific pressure was carried out, and then the runaway reaction under adiabatic conditions was further simulated by the vent sizing package 2 (VSP2) to measure temperature and pressure data with respect to time of the runaway excursion. Finally, the apparent activation energy of H 2 O 2 and propylene oxide reaction was obtained via temperature variation equation to evaluate the degree of potential hazard in industry.
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