Simultaneous desulfurization and denitrification from flue gas by Ferrate(VI).
Simultaneous desulfurization and denitrification from flue gas by Ferrate(VI).
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DOI：
10.1021/es103857g
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发表时间：
2011-04
影响因子：
11.4
通讯作者：
Yi Zhao;Yinghui Han;Tianzhong Ma;Tianxiang Guo
中科院分区：
文献类型：
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作者：
Yi Zhao;Yinghui Han;Tianzhong Ma;Tianxiang Guo
开发了一种新型的半干法烟气脱硫脱硝工艺。根据烟气循环流化床（CFB）系统的条件，制备了高铁酸盐吸收剂，并将其加入到加湿水中，实验研究了高铁酸盐浓度、加湿水pH值、入口烟气温度、停留时间、Ca/（S+N）摩尔比、SO_2和NO浓度等因素对脱硫脱硝效果的影响。在高铁酸盐浓度为0.03 M、增湿水pH值为9.32、入口烟气温度为130 °C、停留时间为2.2 s、Ca/（S+N）摩尔比为1.2的最佳实验条件下，SO2和NO的去除率分别达到96.1%和67.2%。此外，还提出了高铁酸盐同时脱硫脱氮的反应机理。
An innovative semidry process has been developed to simultaneously remove NO and SO₂ from flue gas. According to the conditions of the flue gas circulating fluidized bed (CFB) system, ferrate(VI) absorbent was prepared and added to humidified water, and the effects of the various influencing factors, such as ferrate(VI) concentration, humidified water pH, inlet flue gas temperature, residence time, molar ratio of Ca/(S+N), and concentrations of SO₂ and NO on removal efficiencies of SO₂ and NO were studied experimentally. Removal efficiencies of 96.1% for SO₂ and 67.2% for NO were obtained, respectively, under the optimal experimental conditions, in which the concentration of ferrate(VI) was 0.03 M, the humidified water pH was 9.32, the inlet flue gas temperature was 130 °C, the residence time was 2.2 s, and the molar ratio of Ca/(S+N) was 1.2. In addition, the reaction mechanism of simultaneous desulfurization and denitrification using ferrate(VI) was proposed.