Volume 42 Issue 4
Aug.  2021
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Cai Jianyu, Peng Zhaofeng, Song Liyun, Hou Huanyu, Li Jian. Effect of SO2 on adsorption of NO from sintering flue gas by modified activated carbon[J]. IRON STEEL VANADIUM TITANIUM, 2021, 42(4): 73-78. doi: 10.7513/j.issn.1004-7638.2021.04.013
Citation: Cai Jianyu, Peng Zhaofeng, Song Liyun, Hou Huanyu, Li Jian. Effect of SO2 on adsorption of NO from sintering flue gas by modified activated carbon[J]. IRON STEEL VANADIUM TITANIUM, 2021, 42(4): 73-78. doi: 10.7513/j.issn.1004-7638.2021.04.013

Effect of SO2 on adsorption of NO from sintering flue gas by modified activated carbon

doi: 10.7513/j.issn.1004-7638.2021.04.013
  • Received Date: 2021-01-11
  • Publish Date: 2021-08-10
  • In order to reduce NOx emission and alleviate the environmental pollution from steel industry, a modified activated carbon adsorbent was prepared by impregnation with potassium carbonate (K2CO3). The effect of SO2 concentration on the adsorption of NO in sintering flue gas by the modified activated carbon and the cyclic adsorption and desorption performance of the modified activated carbon were investigated. The results show that SO2 can improve the initial adsorption rate of NO but significantly reduce the saturated adsorption capacity of the modified activated carbon. SO2 occupies the active sites of the carbon by chemical adsorption, and the sulfites and sulfates formed are difficult to be desorbed by heating, resulting in difficulty of recovering the initial adsorption capacity of the modified activated carbon. Under the influence of SO2, the attenuation rate of the adsorption capacity of the modified activated carbon is about 1.414 17 mg/g. According to the attenuation rate and the moving bed adsorption device, appropriate input parameters of the fresh activated carbon can be adopted to guide the application of the modified activated carbon for removal of NO in the sintering flue gas, which can effectively reduce the environmental pollution and realize effficient utilization of resources.
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