Multilayer modified NH<inf>4</inf>NO<inf>3</inf> granules with 3D nanoporous structure: Effect of the heat treatment regime on the structure of macro- and mezopores

The article is devoted to the investigation of the structure of macro- and mesopores on the surface and inside of modified NH4NO3 granules. The main quality indicators of modified NH4NO3 granules are presented and the relationship between the nanoporous structure of granules and the quality indicators is shown. Various thermodynamic conditions for obtaining a nanoporous structure of the surface and internal layers during the modification of granules are considered. The optimal regime for the uniformity of the temperature distribution in the vortex granulator is the regime of mixed motion of the drying agent. In this mode, mainly “modification” pores are formed, “mechanical” pores due to the…