Mathematical models to describe the drying process of Moringa oleifera leaves in a convective-air dryer

Drying kinetics of Malaysian Moringa oleifera leaves was investigated using a convective-air dryer. The drying parameters were: temperature (40, 50, 60, 70 °C), air velocity (1.3 m s–1, 1.7 s–1). process took place in the falling rate period and there an absence constant this experiment. Six mathematical models (Lewis, Henderson Pabis, Wang Singh, Peleg, Page, logarithmic) were selected for description characteristics leaves. Singh model determined as best based on highest overall coefficient determinant (R2) lowest root mean square error (RMSE). effective diffusivity (Deff ) also calculated which range 3.98 × 10–11 m2 s–1 to 1.74 10–10 s–1. An Arrhenius relation constructed determine activation energy samples convective M. 39.82 kJ mol–1 33.13 at velocities 1.3 respectively.