The thin layer drying characteristics of hazelnuts during roasting
1999
Abstract Thin layer drying characteristics of hazelnuts during roasting were described for a temperature range of 100–160°C, using five semi-theoretical and two empirical thin layer models. The effective diffusivity varied from 2.301×10 −7 to 11.759×10 −7 m 2 /s over the temperature range. Temperature dependence of the diffusivity coefficient was described by Arrhenius-type relationship. The activation energy for moisture diffusion was found to be 1891.6 kJ/kg. Thin layer drying characteristics of hazelnut roasting were satisfactorily described by an empirical Thompson model with the linear temperature dependence.
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