Characterization method of dielectric properties of free falling drops in a microwave processing cavity and its application in microwave internal gelation

Microwave internal gelation (MIG) is a chemical process proposed for the production of nuclear particle fuel. The internal gelation reaction is triggered by a temperature increase of aqueous droplets falling by gravity by means of non-contact microwave heating. Due to the short residence time of a solution droplet in a microwave heating cavity, a detailed knowledge of the interaction between microwaves and chemical solution (shaped in small drops) is required. This paper describes a procedure that enables the measurement of the dielectric properties of aqueous droplets that freely fall through a microwave cavity. These measurements provide the information to determine the optimal values of the parameters (such as frequency and power) that dictate the heating of such a material under microwaves.

Published in:
Measurement Science and Technology, 24, 9, 095009

 Record created 2015-05-02, last modified 2018-01-28

Rate this document:

Rate this document:
(Not yet reviewed)