The Combustion Characteristics of Coal Blends under Low Oxygen Atmosphere Using the Thermogravimetric Analyzer

Experiments on coal blends combustion were carried out using simultaneous TGA dynamic runs under low oxygen atmosphere. With the increasing of bituminous coal, the initial combustion temperature increases, however there is no obvious change in the burnout temperature. During coal blends combustion, lignite is dominant in the ignition stage, while bituminous coal has more influence on the burnout stage. The combustion characteristic index (S) indicates that adding bituminous coal will reduce the combustion characteristic of coal. The activation energy (E) is calculated by Coats-Redfern method. The results indicate that with the addition of bituminous coal, the activation increases from 12.58 to 38.4 KJ/mol.