Comparação de modelos matemáticos da cinética da secagem de folhas de pennyroyal (Mentha pulegium L.)
DOI:
https://doi.org/10.33448/rsd-v11i6.21924Palavras-chave:
Secagem por convecção; Modelo matemático; Curvas de secagem.Resumo
Mentha pulegium L., popularly known as pennyroyal, has simple leaves that give off a pleasant aroma when crushed. The main objective of this work was to carry out the drying of pennyroyal leaves, to estímate the effective diffusion coefficient through drying kinetics in forced convection, and to, determine the best mathematical model at four different temperatures (40, 50, and 60 ºC) inflow. 1.5 m/s air. Analyzing the drying curves, it was observed that the drying kinetics were strongly influenced by temperature. The thin layer models that best fit the experimental data were Approximate Diffusion, Two Terms, and Logarithmic for the temperatures of 40, 50, and 60 °C, respectively. The evaluation method used the R² (coefficient of determination), RMSE (root-mean-square), and X² (chi-square), and the coefficient of determination parameter remained >0.90. The effective diffusion coefficient decreased 74% with increasing temperature from 40 ºC to 60 ºC and enthalpy and entropy decreased with increasing temperature, while Gibb's free energy increased 5% for each increment of 10 ºC in temperature.
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Copyright (c) 2022 Wesley da Luz; Gabriela Pinheiro dos Santos; Luciana Alves da Silva; Carla Rosalyn Baca Arévalo; Aroldo Arévalo Pinedo; Carlos Alberto Baca Maldonado; William Renzo Cortez-Vega; Sandriane Pizato; Rosalinda Arévalo Pinedo
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