Thermogravimetric study of combustion of biomass and anthracite coal by iso-conversional method

The combustion characteristics of biomass, anthracite coal and their blends were investigated using thermogravimetry, and the kinetic parameters and combustion reaction mechanisms were tested by combining the iso-conversional method and Avrami method in order to find out the kinetics characteristics responsible for the combustion of samples. In biomass combustion, two peaks were observed at 332.3 and 472.3 °C, but the reactive rate curve of coal showed one peak with maximum mass loss rate at 552.8 °C. The ignition temperature and burnout temperature of blends decreased, and the ignition index and combustibility index increased with the increase in biomass content. Calculation of kinetic parameters showed that the values of activation energy of blends increased with increasing biomass content from 150.77 to 215.93 kJ/mol. The reaction orders of blends lay in the range of 0.44 and 0.78.