Investigation drying kinetic, effective diffusivity coefficient and activation energy in shelled hazelnut drying process

The goal of this research was studying kinetic of shellded hazelnut (corylus avellana) at temperature range of 40-60 0C that beside drawing curve of moisture changes at different temperature and modeling frying process, effective diffusivity coefficient, activation energy, total energy, specific energy required for drying shellded hazelnut was calculated in single-layer form. Result of consideration showed that the duration of drying at 60 0C was 34.42 and 20 percent less than 40 and 50 0C. In modeling the process of drying hazelnut Midilli et al in 3 temperatures of drying has had the most suitable fitting with data of experiment comparing to other models. Also effective distribution coefficient in dried hazelnut samples at different temperature changes between 1.26373×10-10 and 1.50064×10-10 m2/s. Activation energy for hazelnut at temperature range of 4060 0c 29.622 KJ/kg. and effective penetration constant was obtained 1.1×10-5.