Dehydration and dielectric permittivity measurements of a porous, inorganic material (13X zeolite) heated with microwave power

Author

Thiebaut, Jean-marie ; Akyel, Cevdet ; Roussy, Georges ; Bosisio, Renato G.

Author_Institution

Lab. de Spectroscopie et des Tech. Microondes, Nancy Univ., France

Volume

37

Issue

1

fYear

1988

fDate

3/1/1988 12:00:00 AM

Firstpage

114

Lastpage

120

Abstract

The microwave drying of 13X zeolite is experimentally studied by continuously measuring the permittivity of a sample zeolite material during given microwave drying cycles. The results are interpreted in light of the dielectric theory of heterogeneous mixtures, making it possible to distinguish the water vapor in circulation within the zeolite structure from the water absorbed on the solid material. The results agree with previous data, showing that the adsorbed water molecules are much less mobile than the free water molecules. Time constants involved with the desorption and transport processes of water are obtained under microwave power heating conditions

Keywords

adsorption; desorption; drying; permittivity measurement; porous materials; radiofrequency heating; water; 13X zeolite; H₂O; adsorbed water molecules; dehydration; desorption; dielectric permittivity measurements; dielectric theory; free water molecules; heterogeneous mixtures; microwave drying; microwave power heating; porous inorganic material; time constant; transport processes; Dielectric materials; Dielectric measurements; Electromagnetic heating; Inorganic materials; Microwave measurements; Molecular sieves; Permittivity measurement; Power measurement; Solids; Water heating;

fLanguage

English

Journal_Title

Instrumentation and Measurement, IEEE Transactions on

Publisher

ieee

ISSN

0018-9456

Type

jour

DOI

10.1109/19.2678

Filename

2678