Characterization and Combustion Kinetics of Chars Obtained from Loquat Stones

Abstract

This paper describes the production of chars from loquat stones in a tube furnace at carbonization temperatures of 600°C, 700°C, and 800°C in a nitrogen flow at a heating rate of 10°C/min. The physical and chemical structures of the stones and chars were investigated by FTIR spectrometer, X-ray diffractometer, and SEM, as well as the combustion reaction and kinetic parameters based on the TG-DTG graphs obtained by thermogravimetric analysis. The combustion reaction was carried out at a heating rate 10°C/min and an oxygen flow rate of 50 ml/min up to 700°C. The kinetic parameters were calculated using the methods by Arrhenius; Coats and Redfern; Horowitz and Metzger; and Ingraham and Marier.

Keywords:

• Arrhenius
• Char
• Coats and Redfern
• Combustion
• Horowitz and Metzger
• Ingraham and Marier
• Loquat stone
• Thermogravimetric analysis

Notes

^∗On dry basis; ^†On dry and ash-free basis; ^‡In percent.

^∗On dry basis; ^†On dry and ash-free basis; ^‡In percent.