Simultaneous Removal of NO and SO2 from Exhaust Gas by Cyclic Scrubbing and Online Supplementing pH-Buffered NaClO2 Solution
Simultaneous Removal of NO and SO2 from Exhaust Gas by Cyclic Scrubbing and Online Supplementing pH-Buffered NaClO2 Solution
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通过循环洗涤和在线补充 pH 缓冲 NaClO2 溶液同时去除废气中的 NO 和 SO2
DOI：
10.1021/acs.energyfuels.9b01106
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发表时间：
2019-07-01
期刊：
影响因子：
5.3
通讯作者：
Song, Liguo
中科院分区：
文献类型：
--
作者：
Han, Zhitao;Lan, Tian;Song, Liguo
采用循环洗涤和在线补加pH缓冲NaClO 2溶液的方法，在实验室规模的反应器中同时脱除模拟废气中的NO和SO2。考察了关键运行参数对污染物去除效果的影响。结果表明，当氧化剂补充摩尔比接近氧化剂消耗摩尔比时，可获得极高的氧化剂利用率。虽然烟气中共存的SO2在吸收过程中会消耗一定量的氧化剂，但SO2水解生成的SO 32-离子中间产物在一定程度上可能有利于NO2的吸收。在洗涤液中引入乙醇可以显著提高NOx的脱除效果，这可能与乙醇对SO 32-氧化的抑制作用有关。通过理论计算和离子色谱分析，对反应机理和洗涤液中的反应产物进行了初步探讨。
Experiments were conducted to simultaneously remove NO and SO2 from simulated exhaust gas by cyclic scrubbing and online supplementing pH-buffered NaClO2 solutions in a bench-scale reactor. The effects of key operating parameters on pollutant removal performance had been investigated. The results suggested that an extremely high oxidant utilization rate could be obtained when the oxidant supplementing molar rate approached the oxidant consumption molar rate. Though co-existing SO2 in flue gas would consume a certain amount of the oxidant during the absorption process, the intermediate products of SO32– ions generated from SO2 hydrolysis might be in favor of NO2 absorption to some extent. The introduction of ethanol in scrubbing solution could enhance NOx removal performance largely, which was possibly because of its inhibition effect on SO32– oxidation. The reaction mechanism and reaction products in scrubbing solutions were also discussed roughly through theoretical calculations and ion chromatography an...