聽請 Abstract: Experiments were con機錢ducted using a bubbling reac廠男tor to investigate nitrogen oxide 水樂absorption in the calcium sulfite 影花slurry. The effects of CaSO₃ concentration, NO₂/NO mole ratio and O₂ concentrations on NO₂ and SO₂ absorption efficiencies w妹司ere investigated. Five types of 報新additives, including MgSO₄, Na₂SO₄, FeSO₄, MgSO₄/Na₂SO₄ and FeSO₄/Na₂SO₄, had been evaluated for enhancing NO₂ absorption in CaSO₃ slurry. Results showed that慢場 CaSO₃ concentration had significant impact o影術n NO₂ and SO₂ absorption efficiencies, and the high場筆est absorption efficiencies of SO₂ and NO₂ could reach about 99.5 城員and 75.0 %, respectively. 得家Furthermore, the NO₂ absorption was closely related to the路對 NO₂/NO mole ratio, and the existence of朋工 NO₂ in flue gas may promote NO男子 absorption. The presence of O₂ in simulated flue gas was暗車 disadvantage for NO(x) 市文removal because it can oxidi外市ze sulfite to sulfate. It was worth poi樹輛nting out that FeSO₄/Na₂SO₄ was the best additive among tho現歌se investigated additives, as the時個 NO₂ removal efficiency was 光又significantly increased from 明刀74.8 to 95.0 %. IC and in s可高itu FTIR results suggest t車請hat the main products were NO₃^- and NO₂^- in liquid phase and N₂O, N₂O₅ and HNO₃ in gas phase during the CaSO裡嗎₃ absorption process.