Effect of NO on the performance of Cu-Mn spinel sorbent in the removal of Hg<sup>0</sup> from flue gas

YANG Ying-ju; ZHANG Ai-jia; LIU Jing; WANG Zhen; YU Ying-ni

Volume 48 Issue 12

Dec. 2020

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Article Navigation > Journal of Fuel Chemistry and Technology > 2020 > 48(12): 1461-1465

YANG Ying-ju, ZHANG Ai-jia, LIU Jing, WANG Zhen, YU Ying-ni. Effect of NO on the performance of Cu-Mn spinel sorbent in the removal of Hg0 from flue gas[J]. Journal of Fuel Chemistry and Technology, 2020, 48(12): 1461-1465.

Citation:

YANG Ying-ju, ZHANG Ai-jia, LIU Jing, WANG Zhen, YU Ying-ni. Effect of NO on the performance of Cu-Mn spinel sorbent in the removal of Hg⁰ from flue gas[J]. Journal of Fuel Chemistry and Technology, 2020, 48(12): 1461-1465.

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Effect of NO on the performance of Cu-Mn spinel sorbent in the removal of Hg⁰ from flue gas

State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, China

Funds:

the National Key Research and Development Program of China 2016YFB0600604

China Postdoctoral Science Foundation 2018M640697

Received Date: 2020-09-08
Rev Recd Date: 2020-10-12

Available Online: 2021-01-23

Publish Date: 2020-12-10

Abstract

Abstract

The effect of NO on the performance of Cu-Mn spinel sorbent in the removal of Hg⁰ from flue gas was investigated by using experimental and density functional theory (DFT) calculation methods. The results indicate that NO shows slightly inhibitory effect on the Hg⁰ removal on the CuMn₂O₄ sorbent at high temperature (>250 ℃), probably due to the competitive adsorption between NO and Hg⁰ on the sorbent surface. At low temperature (< 250 ℃), NO has little influence on the Hg⁰ removal. The mercury species adsorbed on the CuMn₂O₄ sorbent exist mainly in the forms of Cu-Hg amalgam and Hg(NO₃)₂. NO can be oxidized into NO₂ over the CuMn₂O₄ sorbent and NO₂ then react with adsorbed mercury to form Hg(NO₃)₂. Cu and Mn atoms are identified as the active sites for the adsorption of NO and Hg⁰. There is a strong interaction between NO and CuMn₂O₄ surface, which is closely associated with the orbital hybridization of Cu, Mn, and N atoms.
- Hg⁰ adsorption,
- Cu-Mn spinel,
- NO,
- adsorption mechanism,
- quantum chemistry calculation

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References(12)

References

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