NO and SO2 emissions from combustion of raw and torrefied biomasses and their blends with lignite

The study revealed that the SO2 emissions from blends are not proportional to the mixing ratio of the fuels and to the emissions properties of the respective fuels. No clear correlation was detected between the NOx emissions and fuel-N content. In addition to the NO and SO2 emissions, the sintering propensity of the ash residue were investigated using scanning electron microscopy (SEM).