RT info:eu-repo/semantics/article
T1 Measurement and correlation of the dielectric properties of a grape pomace extraction media. Effect of temperature and composition
A1 Álvarez Martín, Ana
A1 Fayos Fernández, José
A1 Monzó Cabrera, Juan
A1 Cocero Alonso, María José
A1 Mato Chaín, Rafael Bartolomé
AB Microwave assisted extraction has been proved to be a useful tool for the recovery of valuable compounds from natural products. However, little is known about the dielectric properties for mixtures of natural products and solvents. In this work, a semi-empirical model is proposed to calculate the dielectric properties of these systems. The variables considered were temperature, solvent composition and solid-liquid ratio. Grape pomace was used as the solid matrix and ethanol-water mixtures as the solvent. The experimental dielectric constant and loss factor of these multiphase solid-solvent samples were measured and compared to the proposed model. Loss factor values were taken under special consideration, since they were boosted by the release of ions from the solid (an increase between 9 and 83%). The model proposed here reproduces the dielectric properties of this multiphase media with an average deviation of 8.1% for the dielectric constant and of 24.8% for the loss factor.
PB Elsevier
YR 2017
FD 2017
LK http://uvadoc.uva.es/handle/10324/21923
UL http://uvadoc.uva.es/handle/10324/21923
LA eng
NO Journal of Food Engineering  Volume 197, March 2017, Pages 98–106
NO Producción Científica
DS UVaDOC
RD 18-nov-2024