| In the present work, the thermal decomposition reaction of HA and some of its derivatives (aqueous solutions of hydroxylamine, hydroxylamine hydrochloride, hydroxylamine sulfate, and hydroxylamine o-sulfonic acid) were studied using adiabatic calorimetry. The effect of some metal contaminants such as Ti, stainless steel, carbon steel, ferric ion, and ferrous ion was also analyzed. Useful information was generated such as safe storage temperatures (onset temperature), maximum temperature, maximum pressure, pressure of noncondensables, heat and pressure generation rates as functions of temperature, temperature vs. pressure and time to maximum rate. To get an insight about the possible decomposition mechanisms, HA decomposition reactions were carried out with and without air above the sample. The thermokinetics of the respective systems was modeled using the heat generation rates. From such kinetic models, reaction order, activation energies, and frequency factors for the overall decomposition reactions were obtained. The kinetic parameters were used in computer simulations to obtain models for the temperature vs. time curves. Since several members of the hydroxylamine family were studied, a comparison of their thermal behavior is presented. |
