查看文章

Drying is a subject of extensive research in the last three decades due to its importance in manufacturing many types of products. It has been modelled by adopting the drying characteristic curve method, the comprehensive transport phenomena approach or the entirely empirical correlation. Following the approach by Chen and Xie (Trans. IChemE Part C: Food Bioprod. Processing (1997) 213–230), this paper describes a mechanistic model of drying of thin layer material (Biot numbers for both heat and mass transfer are small) using a reaction engineering approach. This method considers drying as a competitive process between ‘evaporation reaction’ and ‘condensation reaction’. Here, the drying kinetics parameters have been established through the experiments performed on pulped Kiwifruit flesh spread onto a shallow metal tray (forming a layer) to simulate the process of making fruit leather. The small Biot …