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Microwave heating rate and dielectric properties of some agricultural wastes

Authors :
Norulaina Alias
Muhammad Abbas Ahmad Zaini
Mohd Johari Kamaruddin
Source :
Nordic Pulp & Paper Research Journal. 38:1-7
Publication Year :
2022
Publisher :
Walter de Gruyter GmbH, 2022.

Abstract

Interaction between the microwave heating rate and dielectric properties of agricultural wastes is important in identifying suitable microwave operating conditions. This work focuses on the interaction between microwave heating rate (power intensity) and dielectric properties of selected agricultural wastes, namely castor shell, empty fruit bunch and palm kernel shell. Heating rate was recorded every 30 s for 10 min in a 2.45 GHz microwave at power intensities of 100, 300, 450, 600, 700 and 800 W. All materials tested display an increase in heating rate with increasing power intensity. Castor shell and empty fruit bunch at 800 W, and palm kernel shell at 600 W exhibit high heating rates of 0.134, 0.165, 0.247 °C/s, respectively. For dielectric properties, palm kernel shell series shows a high value of loss tangent compared to the other counterparts, indicating its effectiveness to be heated via microwave.

Subjects

Subjects :
General Materials Science
Forestry

Details

ISSN :
20000669 and 02832631
Volume :
38
Database :
OpenAIRE
Journal :
Nordic Pulp & Paper Research Journal
Accession number :
edsair.doi...........82d86258af97a263868de0123db9a41a