Emergency relief systems for reducing risk of runaway reactions are being used as one of the most cost-effective technical measures. Therefore

in order to design the pressure relief system sizing

research on a 38.6% methanol-acetic anhydride was carried out based on the bench-scale Phi-TEC Ⅱ calorimeter apparatus. Parameters of thermal behavior were measured with thermal inertia 1.1. Results show that self-heating decomposition temperature tends to be around 37℃

with its corrective heat of the reaction being 205.2 kJ·kg-1. The fitting equation obtained from experimental data is basically in accord with Antoine equation. The reactive system can be identified as a vapor system. The mass flow capacity and the average two-dimensional flowing capacity per cross-section unit area of the vent-line were determined by Leung's method and ERM. Thus

the required relief area was determined to be 1.36×10-3 m2. Thus

it is proved that the Phi-TEC Ⅱ calorimeter can be used to supply the basic runaway chemical reaction data and in turn provide technical supports for the emergency relief system

which is helpful to improve the reliability of the safety relief design.