Hydroxylamine nitrate self-catalytic kinetics study with adiabatic calorimetry

Decomposition Pathways for Aqueous Hydroxylammonium Nitrate Solutions: a DFT Study

“…As such, there have been many experimental and theoretical studies concerning the combustion behaviour of the so-called next generation HAN-based propellants [4][5][6][7][8][9][10][11]. Previous research has demonstrated that some HAN-based solutions exhibit extremely high burning rates, and this property has limited the usefulness of such solutions in certain applications [3][4][5][6] because overly high burning rates can sometimes lead to serious accidents [12][13][14]. Therefore, the development of advanced techniques to control the combustion of HAN-based propellants is essential.…”

Computational fluid dynamics analysis on the critical behavior of reactive chemicals

“…It can be observed that the temperature exponentially increases with time, and the temperature at the tank center is slightly higher than the tank average temperature. The large-scale system enters the thermal runaway regime at 460 K whereas the smaller-scale system does not (Liu et al, 2009). Generated energy from the decomposition reaction is proportional to reactant volume.…”

“…The reactant consumption source, S r , is obtained from the autocatalytic reaction mechanism of HAN (Liu, Wei, Guo, Rogers, & Mannan, 2009) and shown as Eq. (2).…”

“…It is assumed that no-slip condition, zero mass and momentum flux applies at the storage tank wall, and the coupled thermal transfer condition applies on the storage vessel walls. The temperature on the outer surface of air cylinder is assumed to be fixed at 298 K. The initial reactant temperature is set to be 460 K, which is a subcritical temperature for a small quantity of diluted HAN solution (Liu et al, 2009), to examine whether the heat transfer enhancement induced by natural convection can significantly reduce thermal runaway hazard. Initial conditions and boundary conditions are summarized as follows.…”

Model for predicting hydroxylamine nitrate stability in plutonium process solutions

“…Recent research on the stability of HAN in aqueous solutions includes kinetic modeling of the oxidation of HAN by nitric acid using ab initio molecular orbital calculations (Ashcraft, Raman, & Green, 2008;Raman, Ashcraft, Vial, & Klasky, 2005), calorimetric and spectroscopic measurements (Kumasaki, 2004;Kumasaki, Fujimoto, & Ando, 2003;Liu, Papadaki, et al, 2009;Liu, Wei, Guo, Rodgers, & Mannan, 2009), and effects of metal ions on HAN stability (Sugikawa, Umeda, Sekino, Matsuda, & Kodama, 2002). A significant amount of work has also been performed on the stability of hydroxylamineewater solutions (Cisneros, Rodgers, & Mannan, 2002Cisneros et al, 2003) prompted by two tragic industrial accidents involving hydroxylamine solutions (Long, 2004;Yusaku, Masahide, Takashi, & Hiroshi, 2005).…”