Experimental Dielectric Properties and Temperature Measurement Analysis to Assess the Thermal Distribution of a Multimode Microwave-Assisted Susceptor Fixed-Bed Reactor DOI Open Access
Alejandro Fresneda-Cruz, Gonzalo Murillo-Ciordia, Ignacio Julián

et al.

Processes, Journal Year: 2025, Volume and Issue: 13(3), P. 774 - 774

Published: March 7, 2025

In this study, the integration of microwave-assisted technology into fixed-bed configuration processes is explored aiming to characterize and address its challenges with a customized multimodal microwave cavity. This research focuses on evaluating uncertainty in contactless temperature measurement methods as spectral thermographic cameras infrared pyrometers, heating performance, thermal homogeneity within fixed beds containing microwave–susceptor materials, including temperature-dependent dielectric characterization such having different geometry size (from 120 5000 microns). The inhomogeneities along bed configurations were quantified, assessing most appropriate arrangement limitation at employed irradiation frequency (2.45 GHz) tackle gas–solid chemical conversions. An increased heterogeneity axial profile was found for finer susceptor particles, while higher susceptibility coarser grades led gradients, ΔT > 300 °C. Moreover, results evidenced that quartz reactor surface by punctual pyrometer entails major error regarding real tubular (up 230% deviation). experimental findings pave way assess characteristics susceptors must perform minimize optimize coupling solid–gas-phase design process upscaling using multimode cavities.

Language: Английский

Experimental Dielectric Properties and Temperature Measurement Analysis to Assess the Thermal Distribution of a Multimode Microwave-Assisted Susceptor Fixed-Bed Reactor DOI Open Access
Alejandro Fresneda-Cruz, Gonzalo Murillo-Ciordia, Ignacio Julián

et al.

Processes, Journal Year: 2025, Volume and Issue: 13(3), P. 774 - 774

Published: March 7, 2025

In this study, the integration of microwave-assisted technology into fixed-bed configuration processes is explored aiming to characterize and address its challenges with a customized multimodal microwave cavity. This research focuses on evaluating uncertainty in contactless temperature measurement methods as spectral thermographic cameras infrared pyrometers, heating performance, thermal homogeneity within fixed beds containing microwave–susceptor materials, including temperature-dependent dielectric characterization such having different geometry size (from 120 5000 microns). The inhomogeneities along bed configurations were quantified, assessing most appropriate arrangement limitation at employed irradiation frequency (2.45 GHz) tackle gas–solid chemical conversions. An increased heterogeneity axial profile was found for finer susceptor particles, while higher susceptibility coarser grades led gradients, ΔT > 300 °C. Moreover, results evidenced that quartz reactor surface by punctual pyrometer entails major error regarding real tubular (up 230% deviation). experimental findings pave way assess characteristics susceptors must perform minimize optimize coupling solid–gas-phase design process upscaling using multimode cavities.

Language: Английский

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