Application of Microwave Drying after Osmotic Dehydration: Effect of Dielectric Properties on Heating Characteristics

In this paper, 2.5D SiO2f/SiO2 composites were fabricated via sol-gel process employing 2.5D braided silica fiber fabrics as reinforcements and high pure silicasol as slurry. The process parameters are optimized and the optimal parameters are as follows: the silicasol of 30.8 wt. % as slurry, microwave drying, and sintering at 900 °C. Utilizing the optimal process parameters, the density and the flexural strength of the composites can reach 1.65 g•cm-3 and 80.68 MPa respectively. Dielectric properties of the 2.5D SiO2f/SiO2 composites were also measured, and the real part of the permittivity is 3.40 at 5 GHz. The excellent mechanical and dielectric properties of the 2.5D SiO2f/SiO2 composites can well meet the requirements of radome materials.

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Multi-stage continuous and intermittent microwave drying of quince fruit coupled with osmotic dehydration and low temperature hot air drying

Innovative Food Science & Emerging Technologies ◽

10.1016/j.ifset.2017.10.007 ◽

2018 ◽

Vol 45 ◽

pp. 132-151 ◽

Cited By ~ 26

Author(s):

Jalal Dehghannya ◽

Seyed-Hamed Hosseinlar ◽

Maryam Khakbaz Heshmati

Keyword(s):

Low Temperature ◽

Osmotic Dehydration ◽

Microwave Drying ◽

Hot Air Drying ◽

Air Drying ◽

Hot Air ◽

Multi Stage

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Moisture Dependent Dielectric Properties and Microwave Drying Behavior of Zirconium Hydroxide

Drying, Roasting, and Calcining of Minerals ◽

10.1002/9781119093329.ch12 ◽

2015 ◽

pp. 97-104

Author(s):

Aiyuan Ma ◽

Xuemei Zheng ◽

Libo Zhang ◽

Jinhui Peng ◽

Shiwei Li ◽

...

Keyword(s):

Dielectric Properties ◽

Zirconium Hydroxide ◽

Microwave Drying ◽

Drying Behavior

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Microwave drying of nickel-containing residue: dielectric properties, kinetics, and energy aspects

Green Processing and Synthesis ◽

10.1515/gps-2019-0051 ◽

2019 ◽

Vol 8 (1) ◽

pp. 814-824

Author(s):

Zhanyong Guo ◽

Fachuang Li ◽

Guang Su ◽

Demei Zhai ◽

Chenhui Liu

Keyword(s):

Dielectric Properties ◽

Arrhenius Equation ◽

Recovery Process ◽

Microwave Drying ◽

Sustainable Utilization ◽

Drying Process ◽

Production Lines ◽

Sample Weights ◽

Valuable Metals ◽

Energy Aspects

Abstract Nickel-containing residue (NCR) is a hazardous solid waste from battery production lines. Recently, the interest in recovering valuable metals from NCR has increased because sustainable utilization of resources is more and more valued. Drying is a key part of the recovery process. In this study, we measured the dielectric properties of the NCR for different moisture contents and temperatures using the cavity perturbation method at 2.45 GHz. The microwave absorption characteristics of NCR had a positive correlation with the moisture content, while it was less efficient in the 20-180°C temperature range. Then found that the microwave drying data at different microwave powers (400-700 W) and for different sample weights (60-120 g) have a better fit with the Midilli-Kucuk model. The activation energy (Ea) was received as 9.76 W/g using an exponential expression based on the Arrhenius equation. Finally, the energy consumption reduce 110 W·h/kg than that of drying with a single microwave power by optimizing the microwave drying process.

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The Importance of Dielectric Properties for the Optimization of Microwave Drying Systems in the Treatment of Drill Cuttings

10.4043/29922-ms ◽

2019 ◽

Author(s):

Ana Carolina Silva Mota ◽

Vinícius Pimenta Barbosa ◽

Fernando Garcia Friaça ◽

Marina Seixas Pereira ◽

Carlos Henrique Ataíde

Keyword(s):

Dielectric Properties ◽

Microwave Drying ◽

Drill Cuttings

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