The isothermal drying kinetics of 21.05% dry basis moisture content paddy was studied by thermogravimetric analysis at experimental temperature of 40, 50, 60 and 70℃. The results indicated that the final moisture content of the sample gradually decreased with the drying temperature increasing, the drying rate and the drying rate peak became higher. The five drying models were utilized to fit the different experimental data. The results showed good fitting effect with all models’ R2 (correlation coefficients) more than 0.9653. The Midilli?Kucuk model’s R2 even more significant than others, due to its value larger than 0.9994, which indicated that the Midilli?Kucuk model was the most appropriate model for this experiment. The effective moisture diffusion coefficient would increase with the drying temperature increasing, and the calculated activation energy was 5.23 kJ/mol.
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