Prediction of Drying Characteristics of Pomegranate Arils

Doymaz I.

FOOD ANALYTICAL METHODS, vol.5, no.4, pp.841-848, 2012 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 5 Issue: 4
  • Publication Date: 2012
  • Doi Number: 10.1007/s12161-011-9315-0
  • Journal Name: FOOD ANALYTICAL METHODS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.841-848
  • Keywords: Activation energy, Effective moisture diffusivity, Pre-treatment solution, Pomegranate arils, Thin-layer drying, MOISTURE DIFFUSIVITY, KINETICS, PRETREATMENTS, QUALITY, TEMPERATURE, COLOR, GRAPE
  • Yıldız Technical University Affiliated: Yes

Abstract

The thin-layer drying characteristics of pomegranate arils were investigated at the temperature of 55, 65 and 75A degrees C, and the thin-layer drying models were used to fit the drying data. The increase in drying air temperature resulted in a decrease in drying time. Five different thin-layer drying models were used to predict the drying characteristics. The Midilli et al. model showed a better fit to experimental drying data as compared to other models. Effective moisture diffusivities were calculated based on the diffusion equation for a spherical shape using Fick's second law, and varied from 9.373 x 10(-11) to 3.429 x 10(-10) m(2)/s over the temperature range. Moisture diffusivity values increased as air temperature was increased. The dependence of moisture diffusivity on temperature was described by an Arrhenius-type equation. The activation energies of control and pre-treated samples were determined to be 49.7 and 40.1 kJ/mol, respectively.