摘要：

针对低温条件下SO₂对Ca(OH)₂吸收NO的影响进行了实验研究，分析了烟气中O₂和H₂O对SO₂促进Ca(OH)₂吸收NO的影响。实验结果表明，当烟气不含SO₂时，Ca(OH)₂对NO基本无吸收作用；烟气中SO₂的存在对NO

Abstract:

The effect of SO₂ on NO removal by Ca(OH)₂ was investigated at a low temperature. The influence of H₂O and O₂ on the enhancement effect of SO₂ on NO removal was analyzed. The experimental results showed that NO removal was negligible in the absence of SO₂. SO₂ could enhance NO removal. H₂O and O₂ have great influence on the enhancement of SO₂ on NO removal. NO could not be absorbed by Ca(OH)₂ in the absence of O₂, even though a high SO₂  removal could be attained. SO₂ could enhance NO removal when H₂O and O₂ were present in the flue gas simultaneously. CaSO₃, a typical desulfurization reaction product, could not oxidize NO to NO₂. The multi-molecular intermediate species, which could decompose to NO₂, was not formed from the adsorption of NO, H₂O and O₂ on the surface of absorbent. There may be some unstable intermediate species formed from the desulfurization reaction, which can accelerate the reaction of NO and O₂.