Effect of SO<sub>2</sub> on adsorption of NO from sintering flue gas by modified activated carbon

Cai Jianyu; Peng Zhaofeng; Song Liyun; Hou Huanyu; Li Jian

doi:10.7513/j.issn.1004-7638.2021.04.013

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

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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

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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

1.
Key Laboratory of Beijing on Regional Air Pollution Control, Beijing University of Technology, Beijing 100124, China
2.
HBIS Company Limited, Shijiazhuang 050023, Hebei, China
3.
HBIS Steel Technology Research Institute, Shijiazhuang 050023, Hebei, China

Received Date: 2021-01-11
Publish Date: 2021-08-10

Abstract

Abstract

In order to reduce NO_x 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.
- sintering,
- flue gas,
- nitric oxide,
- modified activated carbon,
- adsorption,
- sulfur dioxide

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References(35)

References

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