Permittivity Measurements for Cypress and Rockrose Biomass Versus Temperature, Density, and Moisture Content
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Pérez Campos, Rafael; Fayos Fernández, José; Lozano Guerrero, Antonio José; Martínez González, Antonio Manuel; Monzó Cabrera, Juan; [et al.]Área de conocimiento
Teoría de la Señal y las ComunicacionesFecha de publicación
2020Editorial
MDPICita bibliográfica
Pérez-Campos R, Fayos-Fernández J, Lozano-Guerrero A, Martínez-Gonzalez A, Monzo-Cabrera J, Mediavilla, I, Peña-Carro, Esteban-Pascual, LS.Permittivity Measurements for Cypress and Rockrose Biomass Versus Temperature, Density, and Moisture Content 2020; 20(17), 4684. https://doi.org/10.3390/s20174684Revisión por pares
siPalabras clave
CypressRockrose
Biomass
Permittivity
Resonant technique
Dielectric constant
Loss factor
Resumen
Permittivity of materials is of utmost importance for microwave applicators’ design and to predict high-frequency dielectric heating of materials. In the case of aromatic plant biomass, however, there are few data that help researchers design microwave applicators for microwave-assisted extraction. In this work, the permittivity of cypress and rockrose biomass samples were measured versus temperature, density, and moisture content. A resonant technique based on a coaxial bi-reentrant microwave cavity was employed to obtain the complex permittivity of biomass samples as a function of those magnitudes around the 2.45 GHz ISM frequency. The obtained measurements show that large variations for permittivity values can be found with moisture content and density changes for both cypress and rockrose biomass. Temperature also has effects in a lesser degree, although it has an important influence on the cypress biomass loss factor. Polynomial expressions fitting the experimental data were provided ...
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