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Removal of NO with the hexamminecobalt solution catalyzed by the carbon treated with oxalic acid

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Abstract

NO can be removed at the same time with SO2 by aqueous Co(NH3)6 2+ solution. The reduction of Co(NH3)6 3+ to Co(NH3)6 2+ is catalyzed by activated carbon to regain the NO absorption ability of the scrubbing solution. Oxalic acid solution is explored to change the carbon surface to ameliorate its catalytic capability. The experimental results suggest that the best catalyst is prepared by impregnating the carbon sample in 0.7 mol l−1 oxalic acid solution for 24 h followed by being activated at 600 °C for 5 h under nitrogen atmosphere. After being treated with oxalic acid solution, the surface area and the acidity on the carbon surface increase. The experiments show that the carbon modified with oxalic acid can get a much higher NO removal efficiency than the original carbon.

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Acknowledgements

The present work is supported by the NSFC (No. 21176081).

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Authors and Affiliations

  1. State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Meilong Road 300, Shanghai, 200237, People’s Republic of China

    Xiang-li Long, Hai-xia Cao, Bei-bei Duan & Ming-lei Jia

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  1. Xiang-li Long
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  2. Hai-xia Cao
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  3. Bei-bei Duan
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  4. Ming-lei Jia
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Correspondence to Xiang-li Long.

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Responsible editor: Bingcai Pan

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Long, Xl., Cao, Hx., Duan, Bb. et al. Removal of NO with the hexamminecobalt solution catalyzed by the carbon treated with oxalic acid. Environ Sci Pollut Res 24, 27788–27798 (2017). https://doi.org/10.1007/s11356-017-0328-0

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  • DOI: https://doi.org/10.1007/s11356-017-0328-0

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