Collection of scientific works Nanosystems, nanomaterials, nanotechnologies
Year 2025 Volume 23, Issue 3
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Evgen STRATIVNOV1, Oleksandr KHOVAVKO1, Anzhela PIATOVA1,3, Andrii NEBESNYI1, Denys FILONENKO1, Dmytro LEONOV2, and Maksym BARABASH1,2,3,4

1Gas Institute, N.A.S. of Ukraine, 39, Degtyarivska Str., UA-03113 Kyiv, Ukraine
2Technical Centre, N.A.S. of Ukraine, 13, Pokrovs'ka Str., UA-04070 Kyiv, Ukraine
3National Technical University of Ukraine 'Igor Sikorsky Kyiv Polytechnic Institute', 37, Beresteiskyi Ave., UA-03056 Kyiv, Ukraine
4Institute for Applied Control Systems, N.A.S. of Ukraine, 42, Academician Hlushkov Ave., UA-03187 Kyiv, Ukraine

Thermal Engineering Calculation of Saggar for Graphite-Powder Processing with Nanoscale Coating of Carbonized Pitch as Li-Ion Battery Anode

915–926 (2025)

PACS numbers: 47.61.-k, 61.43.Gt, 66.10.cd, 66.25.+g, 81.05.U-, 81.20.Ev, 82.47.Aa

Received 17 June, 2025

For the thermal treatment of powders, a special thick-walled container (a saggar) is used to ensure uniform heating of the material throughout its volume. This article presents a method of convective heating of a 1-liter laboratory reactor using flue gases from natural-gas combustion. A thermal engineering calculation and numerical modelling in COMSOL Multiphysics are conducted. The calculation involves the consideration of complex heat transfer: from the gas flow to the saggar wall, through the wall, and further into the powder layer. The problem is solved in a transient, axisymmetric formulation. Data are obtained on the temperature regimes of the material being processed and the heating rate. The simulation also enables the determination of the thermal diffusivity of the powder layer. The results are planned to be used in the design of an industrial reactor with a volume of 40 litres.

KEY WORDS: saggar, spheroidized graphite powder, heat transfer, thermal conductivity, thermal diffusivity, computational fluid dynamics, computer-aided design and modelling

DOI: https://doi.org/10.15407/nnn.23.03.0915

Citation:
Evgen Strativnov, Oleksandr Khovavko, Anzhela Piatova, Andrii Nebesnyi, Denys Filonenko, Dmytro Leonov, and Maksym Barabash, Thermal Engineering Calculation of Saggar for Graphite-Powder Processing with Nanoscale Coating of Carbonized Pitch as Li-Ion Battery Anode, Nanosistemi, Nanomateriali, Nanotehnologii, 23, No. 3: 915–926 (2025); https://doi.org/10.15407/nnn.23.03.0915

Funding / Acknowledgments:
This publication was partially supported by the Project 'GR4FITE3' (No. 101103752) under the Horizon Europe Program, HORIZON-CL5-2022-D2-01-01 (HORIZON Innovation Actions, Granting authority - European Climate, Infrastructure and Environment Executive Agency).

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