Journal of Radio Electronics. eISSN 1684-1719. 2025. ¹5
Full text in Russian (pdf)
DOI: https://doi.org/10.30898/1684-1719.2025.5.8
MODELING OF ELECTRODYNAMIC COMPONENTS
OF A MICROWAVE PYROLYSIS COMPLEX
A.A. Vikharev, T.O. Krapivnitckaia, S.A. Ananicheva, A.B. Alieva, A.V. Gromov,
M.Yu. Glyavin, N.Yu. Peskov
Federal Research Center A.V. Gaponov-Grekhov Institute of Applied Physics RAS,
603950, Russia, Nizhny Novgorod, Ul'yanov St., 46
The paper was received May 23, 2025.
Abstract. This work is devoted to developing a microwave complex for thermal processing of peat (pyrolysis). To implement the study, the necessary physical properties of high-moor and low-moor peat were studied. Key parameters characterizing the dielectric characteristics of the research objects were measured. The loss tangent and permittivity for the high-moor peat were 3.4×10-2 and 1.58, and for the low-moor peat 6.5×10-2 and 2.76, respectively. Structural elements for creating a microwave complex that allows processing a large volume of organic material during pyrolysis are proposed. Efficient waveguide rotations, an optimized transition from a rectangular waveguide section to a round one, a non-reflective vacuum barrier window, and an elliptical microwave radiation polarization converter are considered in this study. The 3D numerical modeling and optimization of the proposed waveguide elements of the system are performed to ensure efficient transmission of microwave energy to the reactor with minimal reflection losses, which contributes to reliable and long-term operation of the complex.
Key words: microwave pyrolysis, oversized microwave reactor, waveguide radiation transmission line, dielectric properties of peat.
Financing: The work was supported by the Russian Science Foundation, grant No. 23-19-00763.
Corresponding author: Krapivnitckaia Tatiana Olegovna, kto@ipfran.ru
References
1. Balasubramanian P. Emerging trends and research frontiers of biochar derived through microwave assisted pyrolysis: A scientometric review // Bioresour Technol Rep. – 2023. – Vol.24. – P. 01601. https://doi.org/10.1016/j.biteb.2023.101601
2. Suriapparao D. V., Tejasvi R. A review on role of process parameters on pyrolysis of biomass and plastics: Present scope and future opportunities in conventional and microwave-assisted pyrolysis technologies // Process Safety and Environmental Protection. – 2022. – Vol.162. – P.435-462. https://doi.org/10.1016/j.psep.2022.04.024
3. Li L. et al. Prediction of product yields from lignocellulosic biomass pyrolysis based on gaussian process regression // Journal of Analytical and Applied Pyrolysis. – 2024. – Vol.177. – P.106295. https://doi.org/10.1016/j.jaap.2023.106295
4. Li J. et al. Microwave-assisted pyrolysis of solid waste for production of high-value liquid oil, syngas, and carbon solids: A review // Renewable and Sustainable Energy Reviews. – 2024. – Vol.189. – P.113979. https://doi.org/10.1016/j.rser.2023.113979
5. Kappe C.O., Dallinger D., Murphree S.S. Practical Microwave Synthesis for Organic Chemists. Wiley, 2008. https://doi.org/10.1002/9783527623907
6. Zhang Y. et al. Renewable High-Purity Mono-Phenol Production from Catalytic Microwave-Induced Pyrolysis of Cellulose over Biomass-Derived Activated Carbon Catalyst // ACS Sustain Chem Eng. – 2018. – Vol.6 (4). – P.5349-5357. https://doi.org/10.1021/acssuschemeng.8b00129
7. Luo J. et al. Review of microwave pyrolysis of sludge to produce high quality biogas: Multi-perspectives process optimization and critical issues proposal // Renewable and Sustainable Energy Reviews. – 2023. – Vol.173. – P.113107. https://doi.org/10.1016/j.rser.2022.113107
8. Su G. et al. Microwave-assisted pyrolysis technology for bioenergy recovery: Mechanism, performance, and prospect // Fuel. – 2022. – Vol.326. – P. 24983. https://doi.org/10.1016/j.fuel.2022.124983
9. Meda V., Raghavan V. An Overview of Dielectric Properties Measuring Techniques // Canadian Biosystems Engineering / Le Genie des biosystems au Canada. – 2005. – Vol.47. – P.15-30.
10. Fomin D.G., Dudarev N.V., Darovskikh S.N. Analysis of methods for measuring the dielectric properties of materials in the microwave range of wavelengths // Zhurnal Radioelektroniki [Journal of Radio Electronics]. 2021. No.6. https://doi.org/10.30898/1684-1719.2021.6.6 (In Russian)
11. Severo S.L.S. et al. Non-resonant Permittivity Measurement Methods // Journal of Microwaves, Optoelectronics and Electromagnetic Applications. – 2017. – Vol.16 (1). – P.297-311. https://doi.org/10.1590/2179-10742017v16i1890
12. Nicolson A.M., Ross G.F. Measurement of the Intrinsic Properties of Materials by Time-Domain Techniques // IEEE Trans Instrum Meas. – 1970. – Vol.19 (4). – P.377-382. https://doi.org/10.1109/TIM.1970.4313932
13. Rothwell E.J. et al. Analysis Of The Nicolson-Ross-Weir Method For Characterizing The Electromagnetic Properties Of Engineered Materials // Progress In Electromagnetics Research. – 2016. – Vol.157. – P.31-47. https://doi.org/10.2528/PIER16071706
For citation:
Vikharev A.A., Krapivnitckaia T.O., Ananicheva S.A., Alieva A.B., Gromov A.V., Glyavin M.YU., Peskov N.YU., Modeling of electrodynamic components of a microwave pyrolysis complex // Journal of Radio Electronics. – 2025. – ¹5. https://doi.org/10.30898/1684-1719.2025.5.8