Physico-сhemical nanomaterials science
Final drying of ammonium nitrate with nanoporous structure in gravitational shelf dryers: hydrodynamic and thermodynamic conditions
N.O. Artyukhovа1, A.E.. Artyukhov2, J. Krmela3
1 Processes and Equipment of Chemical and Petroleum Refinery Department, Sumy State University, Rymskogo-Korsakova str.,  2, Sumy-40007, Ukraine. 
E-mail: n.artyukhova@pohnp.sumdu.edu.ua 
2 Processes and Equipment of Chemical and Petroleum Refinery Department, Sumy State University, Rymskogo-Korsakova str.,  2, Sumy-40007, Ukraine. 
E-mail: a.artyukhov@pohnp.sumdu.edu.ua
3 Department of Numerical Methods and Computational Modeling, Alexander Dubcek University of Trencin, 491/30, I. Krasku, 02001, Puchov, Slovak Republic
E-mail: jan.krmela@fpt.tnuni.sk 

The article is devoted to the study of the structure of ammonium nitrate granules with nanostructured porous layers, which are obtained as a result of moistening and multi-stage drying . The necessity of an additional stage of granule dehydration in the technology of porous ammonium nitrate producing has substantiated.  The results of studies of the nanoporous structure of granules of porous ammonium nitrate after the stage of multi-stage drying showed the following patterns:
- an extensive network of deep curvilinear (winding) mesopores of a “modification” character is created;
- pores are evenly distributed over the entire surface of the granules;
- smaller pores practically do not merge into ensembles;
- the number of "mechanical" pores and destruction of the granules is significantly reduced.
This work was carried out under the project «Small-scale energy-saving modules with the use of multifunctional devices with intensive hydrodynamics for the production, modification and encapsulation of granules », state registration No. 0119U100834.

1.	Artyukhov A.E., Artyukhova N.O., Ivaniia A.V. Creation of software for constructive calculation of devices with active hydrodynamics // Proceedings of the 14th International Conference on Advanced Trends in Radioelectronics, Telecommunications and Computer Engineering (TCSET 2018). – 2018. – vol. 2018-April. – P. 139-142.