ABSTRA事坐CT. The simultaneous remov會土al of nitrogen oxides (NOx) and sulfur dioxide (SO2) by absorption is considere呢什d to be one of the most promising t討議echnologies for flue gas 還影treatment, and sulfite is the main com個裡ponent of the absorpti如女on solution. To underst子答and the chemical behaviors of the NO2 absorption in sul西妹fite solution, the absorption time 鄉窗dependences of concentrations of nitrog玩街en and sulfur composi分煙tions in both gas phase a見從nd liquid phases were不謝 investigated by flue 筆放gas analyzer, Ion chromatograp我車hy (IC), Gas chromatog哥務raphy (GC), and Fourier transfor店慢m infrared spectrometry (花志FTIR) methods using a bubbling r新信eactor. The mass equilibrium of the N a離綠nd S compositions were also學做 studied. The results制員 indicate that sulfite concentra通女tion plays a vital role in NO市小2 absorption. The main absorpti不場on products are NO3− and NO2−, and NO2− can be converted into NO3− in the presence of oxygen. 南好Besides, about 4% to 9少舊% by-products of S compositions are風飛 formed, and 4% to 11% by-pr相都oducts of N compositions such秒工 as NO, N2, N2O5, N2O, and HNO3 in the gas phase were detected 醫技in the emissions from the bubbling r來北eactor. On the basis of 愛們N and S compositions, a possible筆黑 pathway of NO2 absorption in sulf吧訊ite solution was propo現個sed.