Aim: This review chapter presents the results of the
multi-step development of a novel thin-film liquid spinning coaxial reactor for
enhanced chemical processes. It consists of a sealed coaxial waveguide with a
dielectric hollow mixer that rotates along the length of the central conductor.
A heating liquid flows in a narrow gap between the rotor and the outer shield
of the coaxial waveguide, powered by microwaves. It is hypothesized that the
acceleration of the conversation rate of chemical reactions is due to the
excitation of micro-vortices for better mixing and the direct application of
microwaves to polar liquids within the narrow gap. The chapter analyses these
developments and the experiments of microwave-assisted heating of polar
reference liquids.
Place and Duration of Study: The last developments and study
of the reviewed designs were performed at the Department of Electronics
Systems, Norwegian University of Science and Technology- NTNU during 2023/2024.
Methodology: The developed and manufactured microwave
reactors were studied experimentally in the reviewed papers.
Results: Several novel thin-film liquid microwave spinning
coaxial reactors known from the literature are analyzed. Most attention is paid
to a sealed reactor design published in detail in 2024. This reactor is studied
in experiments, and the liquid temperature and applied and reflected microwave
power levels are given for alumina and quartz rotors installed into the
reactors filled with ethanol or methanol.
Conclusions: Analyses of experimental data confirm the
workability of the initial designs in the part of high-speed rotation dynamics,
microwave feeding, and dumping of significant-size liquid bubbling by
excitation of micro-vortices in the rotor-stator narrow gap of coaxial
reactors. Further improvements to the analyzed reactors are considered.
Author(s) Details
Guennadi A. Kouzaev
Department of Electronic Systems, Norwegian University of
Science and Technology – NTNU, Trondheim-7491, Norway.
Please see the book here:- https://doi.org/10.9734/bpi/cmsdi/v9/3845
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