(47cf) Ammonium Nitrate Condition-Dependent Thermal Decomposition

Runaway reactions present a potentially serious threat to the chemical process industry. In general, this research topic will investigate the mechanisms that drive these reactions, develop predictive models, and create appropriate and effective mitigation strategies. Specifically, this project will look at identifying the root causes associated with ammonium nitrate (AN) explosions, so that the risk can be reduced, while maintaining its agricultural benefit. This work focuses on developing reaction stoichiometry under different conditions, thermodynamic parameters and kinetic parameters related to AN thermal decomposition. In this research, Reactive Systems Screening Tool (RSST), Automated Pressure Tracking Adiabatic Calorimeter (APTAC), and Differential Scanning Calorimetry (DSC) will be used.

Ammonium nitrate can explode under favorable conditions, such as the existence of specific additives. Some materials change the chemical reaction conditions, inhibiting the explosion; others act as promoters, increasing the explosion risk. This study will look into the behavior of AN with different types of additives including promoters and inhibitors, combined and in isolation. Apart from that, weathering effect, humidity effect, and volume effect will be examined to find out how the storage condition will affect decomposition of AN. Those results will be compared with the work done in literature and some regulatory issues associated with it.