ABSTRACT. The s公呢imultaneous removal of nitrogen oxi國討des (NOx) and sulfur dioxide (SO2) by absorption is considered to be one麗呢 of the most promising technologies 遠麗for flue gas treatment, and sulfite在年 is the main component of站村 the absorption solution.冷笑 To understand the chemical b北習ehaviors of the NO2 absorption in sulfite solution,事著 the absorption time depen身友dences of concentrations of nitrogen 外鐵and sulfur compositions in both gas p著報hase and liquid phases were農工 investigated by flu工我e gas analyzer, Ion chromato資美graphy (IC), Gas chromatography (GC)月區, and Fourier transform窗秒 infrared spectrometry (FTIR) methods空鐵 using a bubbling reactor.我家 The mass equilibriu高靜m of the N and S compositions 厭年were also studied. The results indicate見木 that sulfite concentration plays a藍現 vital role in NO2 absorption. The main absorptio服厭n products are NO3− and NO2−, and NO2− can be converted into N老做O3− in the presence of oxygen. Bes討樹ides, about 4% to 9% by-products 業美of S compositions are formed, an個朋d 4% to 11% by-products of 資制N compositions such as NO, N2, N2O5, N2O, and HNO3 in the gas phase were de北海tected in the emissions fro的資m the bubbling react少見or. On the basis of N and S composit歌這ions, a possible pathway of 高現NO2 absorption in sulfite solu長車tion was proposed.