A thermogravimetric analysis of the combustion of a Brazilian mineral coal

Química Nova

关键词: coal;    combustion;    kinetics;   

DOI  :  10.1590/S0100-40422008000100021

来源: DOAJ

【 摘 要 】

Knowledge of coal combustion kinetics is crucial for burner design. This work aims to contribute on this issue by determining the kinetics of a particular Brazilian bituminous coal. Non-isothermal thermogravimetry was applied for determining both the pre-exponential factor and the activation energy. Coal samples of 10 mg and 775 mm mean size were used in synthetic air atmospheres (21 % O2). Heating rates from 10 to 50 ºC/min were applied until the temperature reached 850 ºC, which was kept constant until burnout. The activation energy for the primary and the secondary combustion resulted, respectively, in 135.1 kJ/mol and 85.1 kJ/mol.

【 授权许可】

Unknown