【作者】 吴晓琴； 叶智； 汪定奇；

【Author】 Wu Xiaoqin;Ye Zhi;Wang Dingqi;School of Chemistry and Chemical Engineering, Wuhan University of Science and Technology;Hubei Province Key Lab of Coal Conversion and New Carbon Material;

【机构】 武汉科技大学化学与化工学院； 煤转化与新型碳材料湖北省重点实验室；

【摘要】 对Fe₂（C₂O₄）₃光催化氧化还原协同湿式氨法络合吸收同时脱硫脱硝进行了实验研究,考察了NO浓度、SO₂浓度、吸收温度、草酸铁浓度、初始p H等因素的影响。结果表明:当模拟烟气中NO浓度为340ppm、SO₂浓度为2110ppm,Fe（II）EDTA浓度为0.03mol/L,Fe₂（C₂O₄）₃浓度为0.09mol/L,初始pH值为6.6,温度为50℃时,NO的脱除效果较好,最高脱硝率达70%,且维持较长时间的稳定,NO液相氧化为NO₃^-,同时脱硫率维持在99%左右。Fe₂（C₂O₄）₃光催化氧化还原过程的协同实现了液相NO氧化及络合吸收剂的再生,络合剂可循环利用,是一种湿法一体化脱硫脱硝方法。更多还原

【Abstract】 This paper researched into wet ammonia-based flue gas desulfurization and denitrification simultaneously aided by Fe₂（C₂O₄）₃ photocatalytic redox cycle. The parameters, such as NO concentration, SO₂ concentration, absorbing temperature,Fe₂（C₂O₄）₃ concentration, initial p H value, were studied on. Experimental results indicated that denitrification efficiency could be obtianed at its highest value of 70 percent on the conditions of NO concentration of 340 ppm, SO₂ concentration of 1200 ppm, Fe（II）EDTA concentration of 0.03 mol/L, Fe₂（C₂O₄）₃ concentration of 0.09 mol/L, initial pH value of 6.6, absorbing temperature of 50℃. The denitrification efficiency may be kept for long time with 99 percent of desulfurization efficiency. NO in aqueous phase was oxidized to NO₃^-. So the photocatalytic redox of Fe₂（C₂O₄）₃ assisted NO aqueous oxidation and chelats regeneration in wet ammonia-based chelating absorbing system. Then chelate could be utilized again. Photocatalytic redox of Fe₂（C₂O₄）₃ carried on the desulfurization and denitrifiation simultaneously in wet ammonia-based chelating absorbing system.更多还原