Characteristics of flue gas emissions during large wood pellet combustion

Due to the influence of the mass and heat transfer, some obvious differences in flue gas emissions may occur during the combustion of wood powders and pellet. The aim of this work was to obtain dynamic data on the release of CO, NO, and SO[sub 2] during single large wood pellet combustion by performing experiments in a tube furnace under different temperatures and air flow rates (3, 4, and 5 L/min). The results from the experiment can serve as an important reference for efficient and clean combustion of biomass. The total emissions and their conversions from biomass combustion can be quantified with these data. The experimental results showed that CO emission curve present a double-peak shape at 800[degrees]C, mainly because of its slow devolatilization and combustion in low temperature. Calculations indicated that 33.78% and 25.99% of the fuel-S was released to the gas phase as SO2 at 1 100 and 1 200 [degrees]C, respectively. On the contrary, most sulfur in the wood pellet discharged with the forms of H[sub