A thermogravimetric analysis of the combustion of a Brazilian mineral coal

Quimica nova

Milioli, Fernando Eduardo¹  Silva Filho, Claudionor Gomes da² 

[1] Universidade de São Paulo, São Carlos, Brasil;Universidade de São Paulo, São Paulo, Brasil

关键词: coal;    combustion;    kinetics.;   

DOI  :  10.1590/S0100-40422008000100021

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

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

【 授权许可】

CC BY