Investigation of microwave dielectric properties of biodiesel components

Muley, Pranjali D.; Boldor, Dorin

doi:10.1016/j.biortech.2012.10.008

Cited by 76 publications

(41 citation statements)

References 22 publications

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“…The dielectric constant of zinc sulfide concentrate at room temperature in this study is similar to that of previous study [2]. It can be seen from Figure 3a,c that the dielectric constant of zinc sulfide concentrate increases gradually as temperature increases from room temperature to 850 • C, this could be because the energy of molecules increases with temperature increases, then the relaxation time decreases, so the response to the external electric field is faster, the dielectric constant of zinc sulfide concentrate increases immediately [17]. The dielectric constant is relatively low (<5) for temperature under 450 • C because of the weak-polar nature.…”

Section: Dielectric Properties Of Zinc Sulfide Concentratesupporting

confidence: 88%

Dielectric Properties of Zinc Sulfide Concentrate during the Roasting at Microwave Frequencies

Guang-jun

Yang

et al. 2017

Minerals

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Abstract:Microwave technology has a potential application in the extraction of zinc from sulphide ores, knowledge of the dielectric properties of these ores plays a major role in the microwave design and simulation for any process. The dielectric properties of zinc sulfide concentrate for two different apparent densities-1.54 and 1.63 g/cm 3 -have been measured by using the resonance cavity perturbation technique at 915 and 2450 MHz during the roasting process for the temperature ranging from room temperature to 850 • C. The variations of dielectric constant, the dielectric loss factor, the dielectric loss tangent and the penetration depth with the temperature, frequency and apparent density have been investigated numerically. The results indicate that the dielectric constant increases as the temperature increases and temperature has a pivotal effect on the dielectric constant, while the dielectric loss factor has a complicated change and all of the temperature, frequency and apparent density have a significant impact to dielectric loss factor. Zinc sulfide concentrate is high loss material from 450 to 800 • C on the basis of theoretical analyses of dielectric loss tangent and penetration depth, its ability of absorbing microwave energy would be enhanced by increasing the apparent density as well. The experimental results also have proved that zinc sulfide concentrate is easy to be heated by microwave energy from 450 to 800 • C. In addition, the experimental date of dielectric constant and loss factor can be fitted perfectly by Boltzmann model and Gauss model, respectively.

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Section: Dielectric Properties Of Zinc Sulfide Concentratesupporting

confidence: 88%

Dielectric Properties of Zinc Sulfide Concentrate during the Roasting at Microwave Frequencies

Guang-jun

Yang

et al. 2017

Minerals

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“…Mudgett (1986) attributed the effect of salt on dielectric constants to the reduced polarization of water by dissolved ions. Muley and Bolder (2013) further explained that the dissolved ions generated a solvation shell which trapped the free polar solvent around them, and thus reduced the polarization potential of the solvent. The dielectric loss factor value increased significantly with increasing salt content.…”

Section: Effect Of Salt Content On the Dielectric Propertiesmentioning

confidence: 97%

Dielectric properties and other physical properties of low-acyl gellan gel as relevant to microwave assisted pasteurization process

Zhang

Luan

Tang

et al. 2015

Journal of Food Engineering

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“…The total cycle time was fixed at 10-11 min, including heating for 5 min. For a better understanding of the materials produced under microwave reaction conditions, dielectric properties were measured using an open-ended coaxial probe method with a slim-form probe [29] and a properly calibrated vector network analyzer (ENA 5071C, Agilent Tech, Santa Clara, CA).…”

Section: In This Approach Equal Volumes Of [Hmim][cl] and [Na][tpb]mentioning

confidence: 99%

Strategies for controlled synthesis of nanoparticles derived from a group of uniform materials based on organic salts

Hamdan

Dumke

El‐Zahab

et al. 2015

Journal of Colloid and Interface Science

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Investigation of microwave dielectric properties of biodiesel components

Cited by 76 publications

References 22 publications

Dielectric Properties of Zinc Sulfide Concentrate during the Roasting at Microwave Frequencies

Dielectric Properties of Zinc Sulfide Concentrate during the Roasting at Microwave Frequencies

Dielectric properties and other physical properties of low-acyl gellan gel as relevant to microwave assisted pasteurization process

Strategies for controlled synthesis of nanoparticles derived from a group of uniform materials based on organic salts

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