Drying of Pomegranate Arils and Selection of a Suitable Drying Model |
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Authors: | ?brahim Doymaz |
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Institution: | (1) Department of Chemical Engineering, Yildiz Technical University, 34210 Esenler, Istanbul, Turkey |
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Abstract: | The drying characteristics of pomegranate arils were investigated in temperature range of 50–70 °C. The increase in drying
air temperature resulted in a decrease in drying time. The drying rate was found to increase with temperature, thereby reducing
the total drying time. Thirteen drying models were evaluated in the kinetics research. The goodness of fit of the proposed
models was evaluated by using the determination of coefficient (R
2
), mean relative percent error (P), reduced chi-square (χ
2), and root means square error (RMSE). The Midilli et al. model showed a better fit to experimental drying data as compared to other models. Effective moisture
diffusivity (D
eff) ranged from 9.447 × 10−11 to 3.481 × 10−10 m2/s as calculated by the Fick’s second law of diffusion. The temperature dependence of the value of effective moisture diffusivity
followed an Arrhenius-type relationship. The activation energy for the moisture diffusion was determined to be 60.34 kJ/mol. |
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Keywords: | |
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