Abstract
This study aims to investigate the impact of CO_2 reactivity on soot reduction in O_2/CO_2 combustion. As a result, unburned hydrocarbons (CH_4 and C_2H_2) in O_2/CO_2 combustion were found to be lower than those in air combustion. Calculations also showed that CO_2 reactivity plays an important role in the PAH (Polycyclic Aromatic Hydrocarbons) reduction in O_2/CO_2 combustion. Calculated PAH concentration in O_2/CO_2 combustion was almost half of that in air combustion when gas temperature and inlet O_2 concentration were the same. It was shown that O_2/CO_2 environments were suited to reduce soot concentration from the viewpoint of CO_2 reactivity.
