Impact of the Instant Controlled Pressure Drop Treatment on Hot Air Drying of Cork Granules

Instant controlled pressure drop (DIC) is known to enhance drying kinetics of cork granules. The overall kinetics is limited by the internal mass transfer. Hence, the drying kinetics carried out at 50, 60, and 70°C allows the effective diffusivity values to be determined as 2.63E-10 to 4.50E-10 and...

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Bibliographic Details
Published in:Drying technology 2010-02, Vol.28 (2), p.180-185
Main Authors: Abdulla, Galal, Belghit, Abdelhamid, Allaf, Karim
Format: Article
Language:English
Subjects:
Activation energy
Air drying
Cork
Diffusivity
Drying
Effects
Granular materials
Granules
Instant controlled pressure drop (DIC)
Kinetics
Mass transfer
Pressure
Pressure drop
Temperature
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Summary:Instant controlled pressure drop (DIC) is known to enhance drying kinetics of cork granules. The overall kinetics is limited by the internal mass transfer. Hence, the drying kinetics carried out at 50, 60, and 70°C allows the effective diffusivity values to be determined as 2.63E-10 to 4.50E-10 and 4.34E-10 to 6.99E-10 m 2  s −1 for untreated and DIC-treated cork granules, respectively. Because the temperature dependence is represented by an Arrhenius-type relationship, the activation energy values are determined as 25.29-48.12 kJ/mol and 32.43-43.98 kJ/mol for untreated and DIC-treated cork granules, respectively.
ISSN:0737-3937
1532-2300
DOI:10.1080/07373930903523829