Abstract: Absorption and catalytic oxidation of nitric oxide could be achieved by using Co(en)³⁺₃.When simultaneous absorbing SO₂ and NO, the precipitation of Co₂(SO₃)₃ would be yielded and the NO removal would be decreased.When urea existed in the absorbing solution, the oxidation rate of SO₂^-₃ would be increased and high NO removal would be achieved for a long time.A larger concentration of Co(en)³⁺₃ could increase NO removal rate.The existence of urea could keep a high NO removal rate when simultaneous absorbing SO₂ and NO.A higher NO removal rate and a higher oxidation rate of SO^2-3 could be achieved in the range of 60—70℃.The NO removal rate and SO^2-₃ oxidation rate are controlled by the surface area and coefficient of gas-liquid mass transfer.

摘要： 利用Co(en)³⁺₃吸收和催化氧化模拟烟气中的NO,同时加入尿素提高SO^2-₃的氧化率，避免产生亚硫酸钴沉淀，以保证长时间烟气高效同时吸收SO₂和NO.实验研究表明，Co(en)³⁺₃浓度大小对脱NO率影响很大，而尿素有无对NO脱除率影响较大;保持高的脱NO率和SO^2-₃氧化率的最佳温度为60～70 ℃;脱NO率和SO^2-₃氧化率受气液传质表面积和传质系数控制.