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Design basics of compact unit for obtaining ammonium nitrate with nanoporous structure

Applied Nanoscience (Switzerland) 2024年第2期14卷 389-399页

作者： Artyukhov, Artem Artyukhova, Nadiia Krmela, Jan Savastru, Olga Volk, Iurii Borozenets, Natalia Ospanov, Dastan Research Institute of Trade and Sustainable Business University of Economics Dolnozemská Cesta 1 Bratislava Slovakia Department of Marketing Sumy State University Rymskogo-Korsakova Str. 2 Sumy Ukraine Department of Numerical Methods and Computational Modeling Alexander Dubcek University of Trencin I. Krasku Str491/30 Puchov Slovakia Department of Computer Algebra and Discrete Mathematics Odesa I.I. Mechnikov National University Dvoryanskaya Str. 2 Odesa Ukraine Department of Applied Mathematics and Complex Systems Modeling Sumy State University Rymskogo-Korsakova Str. 2 Sumy Ukraine Department of Higher Mathematics Sumy National Agrarian University Herasyma Kondratieva Str. 160 Sumy Ukraine Department of Transport Equipment and Technology Saken Seifullin Kazakh Agrotechnical University Zhenis Avenue 62 Nur-Sultan Kazakhstan

The current work describes the algorithm for obtaining porous ammonium nitrate granules in granulation plants using devices with different fluidized bed configurations. We present brief theoretical foundations for calculating the main equipment of the granulation plant. We develop and propose the design of individual units for the sequential implementation of the main stages of ammonium nitrate modification to obtain a nanostructured porous surface layer. We assess the ammonium nitrate nanoporous structure quality and show further ways to improve the technology. Current work also pays attention to methods for ensuring the necessary specific quality indicators of porous ammonium nitrate by choosing the optimal technological mode of the unit operation and the design characteristics of the main equipment. © King Abdulaziz City for Science and Technology 2023.

关键词： Granulation

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Theoretical Basics of Final Drying of Ammonium Nitrate with Nanoporous Structure in Gravitational Shelf Dryers 1

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8th International Science and Practice Conference Nanotechnology and Nanomaterials, NANO 2020

作者： Artyukhova, N.O. Krmela, J. Krmelova, V. Department of Marketing Sumy State University 2 Rymskogo-Korsakova str Sumy40007 Ukraine Department of Numerical Methods and Computational Modeling Alexander Dubcek University of Trencin 491/30 I. Krasku Puchov02001 Slovakia Department of Materials Technologies and Environment Alexander Dubcek University of Trencin 491/30 I. Krasku Puchov02001 Slovakia

ISBN: (数字)9783030747411

ISBN: (纸本)9783030747404

The chapter describes the theoretical fundamentals for the final drying of ammonium nitrate granules with the nanoporous structure in multistage shelf units. The computer modeling of the hydrodynamic conditions for the final drying of porous ammonium nitrate (PAN) is demonstrated. The moisture content changing process in the disperse material and a drying agent in the shelf dryer’s workspace during the final drying of PAN is theoretically described. This work is also aimed to develop the mathematical model, which determines the moisture characteristics of the disperse material (PAN) and the drying agent, and to perform the optimization calculation, adjusted for construction peculiarities of the shelves. Based on the model, the calculated data of the moisture field in the disperse material and the drying agent are obtained. The results of studying the nanoporous structure morphology in PAN granules obtained in different periods of the drying process in a gravitational shelf device are presented. © 2021, The Author(s), under exclusive license to Springer Nature Switzerland AG.

关键词： Drying

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methods for Controlling the Properties of Nanoporous Layers in Granules of Porous Ammonium Nitrate: Stage of Drying 1

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8th International Science and Practice Conference Nanotechnology and Nanomaterials, NANO 2020

作者： Artyukhova, N.O. Krmela, J. Krmelova, V. Artyukhov, A.E. Department of Marketing Sumy State University 2 Rymskogo-Korsakova Str. Sumy40007 Ukraine Department of Numerical Methods and Computational Modeling Alexander Dubcek University of Trencin 491/30 I. Krasku Puchov02001 Slovakia Department of Materials Technologies and Environment Alexander Dubcek University of Trencin 491/30 I. Krasku Puchov02001 Slovakia

ISBN: (数字)9783030747411

ISBN: (纸本)9783030747404

This work substantiates the possibility to control the quality of nanostructured porous layers in porous ammonium nitrate (PAN) granules by introducing an additional stage of final drying and choosing the optimal thermodynamic conditions for this process. The necessity of the final drying stage in the PAN production technology is validated. An algorithm for calculating the thermodynamic parameters of the drying unit is presented. The results of studying the morphology of PAN granules with various diameters, obtained in a gravitational shelf dryer, are demonstrated. The results from study of the thermodynamic conditions for the implementation of the PAN final drying stage will be included in the methodology for the technological calculation of the granulation-drying unit. © 2021, The Author(s), under exclusive license to Springer Nature Switzerland AG.

关键词： Drying

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Thermodynamic Calculation of Vortex Granulator Operation for Producing of Ammonium Nitrate with Nanoporous Structure 7th

Thermodynamic Calculation of Vortex Granulator Operation for...

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7th International Science and Practice Conference Nanotechnology and Nanomaterials, NANO 2019

作者： Artyukhov, A.E. Lytvynenko, A.V. Krmela, J. Krmelova, V. Processes and Equipment of Chemical and Petroleum-Refineries Department Sumy State University Rymskogo-Korsakova Str 2 Sumy40007 Ukraine Department of Numerical Methods and Computational Modeling Alexander Dubcek University of Trencin 491/30 I. Krasku Puchov02001 Slovakia Department of Materials Technologies and Environment Alexander Dubcek University of Trencin 491/30 I. Krasku Puchov02001 Slovakia

ISBN: (纸本)9783030519049

The work is devoted to the creation of a thermodynamic optimization method for calculating a vortex granulator. An algorithm to determine the temperature fields in the workspace of a vortex granulator is based on the previous data;a series of thermal imaging studies and the results of computer modeling is proposed. The results of studies regarding the gas flow temperature field in the vortex granulator workspace, depending on the fluidizing agent’s (drying agent) twisting degree, are proposed. During the creation of an optimization calculation algorithm, the change in the nanoporous structure of the ammonium nitrate granule in the specified temperature ranges and the intensity of the fluidizing agent’s motion was taken into account. An optimal thermodynamic range (main modes) of the vortex granulator operation which enables to obtain NH4NO3 granules with the extended network of pores with required size on the surface of the sample and inside it is proposed. New constructions of the vortex granulators are described, in which the motion of the drying agent and its uniform distribution over the workspace in the device are stabilized. © 2021, Springer Nature Switzerland AG.

关键词： Nitrates

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Final Drying of Ammonium Nitrate with Nanoporous Structure in Gravitational Shelf Dryers: Hydrodynamic and Thermodynamic Conditions 7th

Final Drying of Ammonium Nitrate with Nanoporous Structure i...

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7th International Science and Practice Conference Nanotechnology and Nanomaterials, NANO 2019

作者： Artyukhova, N.O. Artyukhov, A.E. Krmela, J. Processes and Equipment of Chemical and Petroleum-Refineries Department Sumy State University 2 Rymskogo-Korsakova str Sumy40007 Ukraine Department of Numerical Methods and Computational Modeling Alexander Dubcek University of Trencin 491/30 I. Krasku Puchov02001 Slovakia

ISBN: (纸本)9783030522674

The chapter is devoted to the study of the ammonium nitrate granules structure with nanostructured porous layers, which are obtained as a result of moistening and multistage drying. The necessity of an additional stage of granule dehydration in the technology of porous ammonium nitrate producing has substantiated. Basic constructions of the updated shelf dryers are given. The author’s software for calculating the hydrodynamic indices of the shelf dryer is presented. The regularities of changes in temperature and humidity parameters of the gravitational shelf dryer operation under different hydrodynamic modes are shown. The results of studies regarding the structure of porous ammonium nitrate samples, which was obtained in dryers of different structures under different hydrodynamic and thermodynamic modes, are demonstrated. The results of studies of the nanoporous structure of granules of porous ammonium nitrate after the stage of multistage 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. © 2020, Springer Nature Switzerland AG.

关键词： Drying

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Influence of carbon nanoparticles on the conductive properties of composite material for nerve conductors

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AIP Conference Proceedings 2023年第1期2976卷

作者： Liudmyla Sukhodub Mariia Kumeda Leonid Sukhodub Oleksandr Tsyndrenko Jan Krmela Vladimíra Krmelová Medical institute Sumy State University 2 Rymskogo-Korsakova St. 40007 Sumy Ukraine Faculty of Industrial Technologies in Púchov Department of Numerical Methods and Computational Modeling Alexander Dubček University of Trenčín Ivana Krasku 491/30 02001 Púchov Slovakia Faculty of Industrial Technologies in Púchov Department of Materials Technologies and Environment Alexander Dubček University of Trenčín Ivana Krasku 491/30 02001 Púchov Slovakia

Although human peripheral nerves are able to regenerate after trauma, this spontaneous process may not be enough to achieve proper functional recovery. This work focuses on the development of porous electroconductive conduits with carbon nanoparticles and conduits coated with PLA (polylactic acid) hydrophobic layers. Those conduits are based on natural biopolymers and are considered suitable candidates for future implantation studies. The carbon nanoparticles represented by fullerene С60 and SWCNTs significantly reduce the degree of porosity of the synthesized materials and enhance their electroconductivity. An additional PLA surface layer reduces materials swelling.

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Development of a technological package “drying unit”: From design to marketing strategy

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AIP Conference Proceedings 2023年第1期2976卷

作者： Nadiia Artyukhova Jan Krmela Vladimíra Krmelová Artem Artyukhov Dastan Ospanov Academic and Research Institute of Business Economics and Management Department of Marketing Sumy State University 2 Rymskogo-Korsakova St. 40007 Sumy Ukraine Faculty of Industrial Technologies in Púchov Department of Numerical Methods and Computational Modeling Alexander Dubček University of Trenčín Ivana Krasku 491/30 02001 Púchov Slovakia Faculty of Industrial Technologies in Púchov Department of Materials Technologies and Environment Alexander Dubček University of Trenčín Ivana Krasku 491/30 02001 Púchov Slovakia Faculty of Engineering Department of Transport Engineering and Technology Saken Seifullin Kazakh Agrotechnical University Zhengis Ave 62 010000 Nur-Sultan Kazakhstan

The work is devoted to developing a technological package “drying unit” using a multistage gravitational dryer as the main equipment. The study aims to create a workable sample of a drying module and propose an algorithm for its industrial implementation. The work uses methods of analysis and synthesis, search for cause-and-effect relationships, theoretical and computer modeling, and experimental studies. The main stages of drying granular materials in a multistage gravitational shelf dryer are described. The tools of influence of the design features of the dryer on the nature of the flow of each stage of the drying process are shown. A variant of the technological scheme of the drying unit and the scheme of automation of the drying process are presented. A set of solutions is proposed for monitoring the technological level of readiness of the ”drying unit” package for industrial implementation. A marketing strategy for the transfer of drying technology using a multistage dryer is described. The result of the study is a roadmap for developing and implementing a drying module using devices with active hydrodynamic modes.

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Final Drying of the Porous Ammonium Nitrate in the Shelf Dryers: Impact of the Granules Flow Constraint Degree on the Nanoporous Structure Quality

Final Drying of the Porous Ammonium Nitrate in the Shelf Dry...

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International Conference on Nanomaterials: Application & Properties (NAP)

作者： Nadiia Artyukhova Ruslan Ostroha Mykola Yukhymenko Jan Krmela Vladimira Krmelova Processes and Equipment of Chemical and Petroleum-Refineries Department Sumy State University Sumy Ukraine Department of Numerical Methods and Computational Modeling Alexander Dubcek University of Trencin Puchov Slovak Republic Department of Materials Technologies and Environment Alexander Dubcek University of Trencin Puchov Slovak Republic

ISBN: (数字)9781728128306

ISBN: (纸本)9781728128313

The article deals with the study of the impact made by the granules flow constraint degree in the workspace of the multistage gravitational shelf dryer on the nanoporous structure of the ammonium nitrate granules. The necessity to introduce the final drying stage into the technology to produce the porous ammonium nitrate was justified. The experimental research data regarding the surface and internal structure of the granule with various relative content of granules in the dryer (degree of the flow constraint) were represented. The obtained results make the base to form the technological calculation of the final drying stage in the general technology to produce the porous ammonium nitrate.

关键词： porous ammonium nitrate nanoporous structure final drying multistage gravitational shelf dryer ammonium nitrate drying stage Porous shelf environment shelves Dryers (equipment) final

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A dynamical model for the calcineurin-NFATc signaling pathway and muscle fiber shifting

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PAMM 2021年第1期20卷

作者： Yesid Villota-Narvaez Angélica Ramírez-Martínez Diego Garzón-Alvarado Oliver Röhrle Biomimetics Laboratory and Numerical Methods and Modeling Research Group (GNUM) Instituto de Biotecnología (IBUN) Universidad Nacional de Colombia Bogotá Colombia Stuttgart Centre for Simulation Sciences (SC SimTech) Pfaffenwaldring 5a 70569 Stuttgart Germany Computational modeling of natural systems Research Group (COMMONS) Mechanical Engineering Department Universidad Central Bogota Colombia Institute for Modeling and Simulation of Biomechanical Systems University of Stuttgart Pfaffenwaldring 5a 70569 Stuttgart Germany

Training exercise produces skeletal muscle adaptation: at the organ scale, as anatomical changes; and at the myofiber scale, as mitochondrial and protein type content. The protein content of a myofiber is controlled by the calcineurin-NFATc signaling pathway: exercise triggers the pathway, and its final product is the translocation of dephosphorylated NFATc to the nucleus. Once in the nucleus, NFATc controls the state of the gene program to encode the slow or the fast fiber type characteristics. In the long term, the adaptation of the fiber type characteristics produces a shift in muscle fiber type: an increase in the number of myofibers of the fast type (which means that myofibers of the slow type shift to fast type) is related to force production; and an increase in the number of myofibers of the slow type (myofibers of the fast type shift to slow type) is related to fatigue resistance. These macroscopic features, i.e. force production and fatigue resistance, are the main target of most training protocols; however, little attention is focused on the limitations imposed by the fiber distribution of muscles at the organ scale. Based on the calcineurin-NFATc signaling pathway, we represented an exercise stimulus by a cytosolic calcium signal, and simulated the dynamics of NFATc in the nucleus. In this contribution, we present a dynamical model for the calcineurin-NFATc signaling pathway to describe the time course of dephosphorilated NFATc in the nucleus. We used an experimental report of a continuous stimulation pattern for calibration, and an experimental report of a pulsed stimulation pattern for comparison; we obtained a good agreement between the simulations and the experimental measurements.

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Modification of the Porous Ammonium Nitrate Granules: Impact of the Modifier Type on the Granule Nanoporous Structure

Modification of the Porous Ammonium Nitrate Granules: Impact...

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International Conference on Nanomaterials: Application & Properties (NAP)

作者： Artem Artyukhov Andrii Ivaniia Roman Galenin Jan Krmela Liudmyla Batsenko Processes and Equipment of Chemical and Petroleum-Refineries Department Sumy State University Sumy Ukraine Department of Economics and Business Administration Sumy State University Sumy Ukraine Department of Numerical Methods and Computational Modeling Alexander Dubcek University of Trencin Puchov Slovak Republic Department of Management in the area of agricultural complex Sumy National Agrarian University Sumy Ukraine

ISBN: (数字)9781728128306

ISBN: (纸本)9781728128313

The article deals with research of the impact, made by the properties of the modifying additives (which are included to the humidifier) on the nanoporous structure of the ammonium nitrate granules after the heat treatment. The experimental studies results of the ordinary ammonium nitrate granules humidification to obtain the developed nanoporous structure are represented. The humidifier type impact on the structure of the surface and deep nanopores was investigated. The obtained results form the base for the technological calculation of the humidification stage in the general technology to get the porous ammonium nitrate.

关键词： porous ammonium nitrate nanoporous structure modification vortex granulator ammonium nitrate Humidifiers MODIFICATION Humidification Porous Modifiers

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