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EDTA-(NH4)2FeSO4络合剂脱除烟气中的氮氧化物

Keywords: 烟气,氮氧化物,络合剂,络合吸收

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Abstract:

络合脱硝法是近年来新型的脱除氮氧化物的方法之一,其中EDTA金属络合剂受到了广泛关注,而亚铁络合剂又具有很好的脱除氮氧化物的效果。考查了硫酸亚铁铵与EDTA形成的Fe(II)EDTA这种比较常见的EDTA金属络合剂对NO的吸收容量,并考查温度、络合剂浓度等对Fe(II)EDTA吸收NO的影响。研究结果表明:在相同的实验环境和实验条件下,对于影响Fe(II)EDTA吸收NO的因素最重要的是温度,其余依次为络合剂浓度、气体流速、氧含量、吸收液pH,最适宜吸收条件是反应温度50℃、络合剂浓度0.1mol/L、进气流速600mL/min、氧含量2%、吸收液pH=6。

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