THERMAL SCIENCE

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Francesco Desogus

,

Renzo Carta

DESIGN OF A CHEMICAL REACTOR UNDER MICROWAVE IRRADIATION IN RESONANCE CONDITIONS

ABSTRACT
Reaction processes often show to be improved by microwave application, but the enhancing effect is not always due solely to the temperature increasing in the medium, which is produced by the radiation exposure. Thus, to study the evolution of such kind of processes needs a strict control of the irradiation conditions and the use of a proper reaction apparatus in which the interaction between radiation and irradiated materials can be precisely defined. The present work is made necessary by the need of operating with controlled and reproducible experimental conditions, and the aim was to design a multi-tube reactor, to work in resonance conditions, inside which the tubes with the fluid to be processed are positioned. In fact, working in resonance conditions allows the irradiated fluid to be exposed to constant microwave power, and the field intensity and power absorption can be accurately calculated and mapped. The cavity was designed by the authors using a proper commercial software for 3-D electromagnetic simulation, then the reactor operation was tested by another commercial multiphysic simulation software. The results here presented show the proper geometrical characteristics of the cavity and of the internal tubes to work at 2.45 GHz of frequency while the irradiation power can be varied depending on the needs of the process. The reactor can work with different homogeneous systems, both chemical and biological (enzyme reactions). The future development will be the construction and the real operation of the designed apparatus in order to confirm the simulation results.
KEYWORDS
chemical reactor, microwave irradiation, resonance conditions, resonant cavity
PAPER SUBMITTED: 2016-11-30
PAPER REVISED: 2018-03-31
PAPER ACCEPTED: 2018-05-13
PUBLISHED ONLINE: 2018-06-03
DOI REFERENCE: https://doi.org/10.2298/TSCI161130173D
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2019, VOLUME 23, ISSUE Issue 1, PAGES [61 - 72]
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Design of a chemical reactor under microwave irradiation in resonance conditions

© 2024 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence