ABS畫街TRACT. The simultaneous rem用哥oval of nitrogen oxides (NOx) and sulfur dioxide (SO2) by absorption is considered to be間用 one of the most promisi爸吃ng technologies for flue gas treatm來日ent, and sulfite is the m山微ain component of the abs門廠orption solution. To understand the che山兒mical behaviors of th長街e NO2 absorption in sulfite solution, t報熱he absorption time dependences of 習近concentrations of nitro們時gen and sulfur compositio喝去ns in both gas phase and liquid pha月厭ses were investigated by flue gas an森畫alyzer, Ion chromatography (I路林C), Gas chromatography北那 (GC), and Fourier tra去銀nsform infrared spectrometr快多y (FTIR) methods using a bubbling re裡村actor. The mass equi煙文librium of the N and S composit謝麗ions were also studied. The results ind我好icate that sulfite c北能oncentration plays a v謝大ital role in NO2 absorption. The main absorp市些tion products are NO3− and NO2−, and NO2− can be converted into NO3− in the presence o拿光f oxygen. Besides, about 4% to 9% by-p刀習roducts of S composition也民s are formed, and 4% to 11風影% by-products of N compositions such as子鐘 NO, N2, N2O5, N2O, and HNO3 in the gas phase we街裡re detected in the emissions from t器呢he bubbling reactor. On the basis of拿嗎 N and S compositions, a p快去ossible pathway of NO2 absorption in sulfite solution呢線 was proposed.