DRYING KINECTICS OF PADDY USING THERMOGRAVIMETRIC ANALYSIS

Abstract

The thermogravimetry (TG) and derivative thermogravimetry (DTG) were used to study the drying kinetics of the paddy. TG experiments were carried out at different heating rates (1, 3, 10 K/min) to study the drying kinetics. The Activation energy and pre exponential factors from the Arrhenious equation were calculated for the drying curves using ASTM and OZAWA-FLYNN WALL analysis. The results showed that the drying reaction was the second order reaction and the activation energy values changing with the partial mass loss representing that the drying reaction was of complex type of reaction. The isothermal drying curves predicted from the dynamic curves showed reasonably high mass loss occurred at moderate range of temperatures of 60–100°C.

Keywords:

• Activation energy
• Astm analysis
• DTG
• Isothermal drying curves
• Ozawa-flynn wall analysis
• TG

Acknowledgments