Journal
PROCESSES
Volume 10, Issue 11, Pages -Publisher
MDPI
DOI: 10.3390/pr10112464
Keywords
drumstick; horseradish; modeling; kinetics; drying; Midilli-Kucuk; diffusivity; activation energy
Categories
Funding
- Guru Jambheshwar University of Science and Technology, Hisar,
- Technical Education Quality Improvement Programme (TEQIP-3) of the Ministry of Human Resource Development (MHRD), Government of India
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This study investigated the drying kinetics of Moringa leaves in a fluidized bed dryer using nine different mathematical models. The analysis determined that the Midilli-Kucuk model was the best fit for the drying curves.
Investigations were undertaken to study the drying kinetics of pretreated and unblanched leaves of Moringa oleifera dried in a fluidized bed dryer (FBD) using nine established thin layer drying mathematical models. The statistical software tool Statistica was utilized to carry out regression analysis, and the model constants were evaluated using nonlinear regression. In nonlinear regression, the R-2 and reduced chi(2) were employed to evaluate the goodness of fit of several mathematical models to the data generated experimentally. The model with the highest R-2 and the lowest reduced chi(2) and root mean square error (RMSE) values was adjudged as best fit to the drying curves. The drying kinetics of drumstick leaves was best explained by the Midilli-Kucuk model, followed by the Logarithmic model. The R-2, reduced chi(2), and RMSE values of the Midilli-Kucuk model under fluidized bed drying varied from 0.9982-0.9997, 0.00003-0.00029, and 0.0059-0.0166 in pretreated and 0.9945-0.9961, 0.00019-0.00054 and 0.0136-0.227 in unblanched Moringa leaves dried at 50-70 degrees C, respectively. The diffusivity (D-eff) values ranged between 2.96 x 10(-9)-3.59 x 10(-9) m(2) s(-1) and 2.92 x 10(-9)-3.04 x 10(-9) m(2) s(-1), and activation energy varied from 13.67-14.07 (KJ/mol) and 13.85-14.11 (KJ/mol) for pretreated and unblanched dried leaves at 50-70 degrees C drying temperatures, respectively.
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