铜及氧化铜对煤燃烧过程多环芳烃排放的影响

The influence of metal copper and cupric oxide additive on Polycyclic Aromatic Hydrocarbons (PAHs) emissions during combustion of bituminous coal was investigated in experimental tube furnace. GC was adopted to analyze PAHs. The results indicate that copper and cupric oxide additive promote PAHs formation, especially for MMW-PAHs (moderate molecular weight PAHs) and HMW-PAHs (high molecular weight PAHs). This phenomenon can be explained by that copper additive offers a lot of active reaction centers for PAHs' synthesis. Because of the dual catalysis of cupric oxide additive, MMW-PAHs emissions remarkably increase. The TEQ (toxicity equivalence quantity) of PAHs emissions is decreased by copper and cupric oxide additive below 800 ℃. Above 900 ℃, the TEQ of PAHs emissions is increased by copper additive. The similar phenomenon has occurred when cupric oxide is added.