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Multistage drying of ammonium nitrate with nanoporous structure

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Abstract

The current paper describes the technological foundations of the porous ammonium nitrate (PAN) convective drying stage in a multistage shelf unit operating as part of a small-sized granulation module. The work consists of two blocks: the theoretical foundations of a multistage shelf dryer operation and the study of the nanoporous PAN structure in the apparatus optimal mode of operation. The main indicator that affects the design of a gravitational shelf dryer is the required residence time of particles (granules) in the zone of contact with the drying agent. On the one hand, this time is determined by the kinetics of the drying process, and, on the other hand, by the hydrodynamic dryer operation mode, the design of the shelves (length, angle of inclination, degree of perforation) and the number of dryer stages. We present a model for calculating the “hydrodynamic” and “kinetic” residence time of PAN granules in the dryer enclosure. Paper demonstrates the features of PAN granules nanoporous structure under conditions when the “hydrodynamic” residence time of PAN granules is less than the “kinetic”, equal to “kinetic” and more than “kinetic”. The results of the research will be used in the development of engineering calculation methods for multistage shelf dryers and regulations for PAN production in devices with active hydrodynamic modes.

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Acknowledgements

This research work had been supported by the Ministry of Science and Education of Ukraine under the project «Technological bases of multistage convective drying in small-sized devices with utilization and heat recovery units», project No. 0120U100476, by the Cultural and Educational Grant Agency of the Slovak Republic (KEGA), project No. 003TnUAD-4/2022.

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Authors and Affiliations

  1. Department of Marketing, Sumy State University, Rymskogo-Korsakova Str.,2, Sumy, Ukraine

    Nadiia Artyukhova & Artem Artyukhov

  2. Department of Numerical Methods and Computational Modeling, Alexander Dubcek University of Trencin, I. Krasku Str., 491/30, Puchov, Slovak Republic

    Jan Krmela

  3. Department of Applied Mathematics and Complex Systems Modeling, Sumy State University, Rymskogo-Korsakova Str.,2, Sumy, Ukraine

    Iurii Volk

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  1. Nadiia Artyukhova
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  2. Jan Krmela
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Correspondence to Nadiia Artyukhova.

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Artyukhova, N., Krmela, J., Artyukhov, A. et al. Multistage drying of ammonium nitrate with nanoporous structure. Appl Nanosci 13, 5091–5099 (2023). https://doi.org/10.1007/s13204-022-02688-z

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