Effect of physicochemical properties of fly ash on mercury adsorption performance

KUANG Jun-yan; XU Wen-qing; ZHU Ting-yu; JING Peng-fei

Volume 40 Issue 06

Jun. 2012

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Article Navigation > Journal of Fuel Chemistry and Technology > 2012 > 40(06): 763-768

KUANG Jun-yan, XU Wen-qing, ZHU Ting-yu, JING Peng-fei. Effect of physicochemical properties of fly ash on mercury adsorption performance[J]. Journal of Fuel Chemistry and Technology, 2012, 40(06): 763-768.

Citation:

KUANG Jun-yan, XU Wen-qing, ZHU Ting-yu, JING Peng-fei. Effect of physicochemical properties of fly ash on mercury adsorption performance[J]. Journal of Fuel Chemistry and Technology, 2012, 40(06): 763-768.

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Effect of physicochemical properties of fly ash on mercury adsorption performance

1.
Research Center for Process Pollution Control, National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China;
2.
Graduate University of Chinese Academy of Sciences, Beijing 100049, China

Received Date: 2011-09-11
Rev Recd Date: 2011-11-24
Publish Date: 2012-06-30

Abstract

Abstract

The effect of physicochemical properties of three fly ash samples on the mercury adsorption performance is investigated using a fixed-bed with a simulated gas by means of X-ray fluorescence spectroscopy, X-ray photoelectron spectroscopy, laser particle size analyzer, scanning electron microscopy and other analytic methods. The results indicate that the mercury adsorption on the fly ash mainly proceeds in physisorption and chemisorption. Uncompleted burned carbon is an important factor for the improvement of mercury removal efficiency, and the C-M bond that is formed via the reaction between C and Ti, Si and other elements may promote the oxidation of mercury. Meanwhile, the inorganic compound such as Fe₂O₃ in the fly ash can also improve the oxidation of mercury. Higher specific surface areas, smaller pore diameter, and moderate particle diameter are all beneficial for the high mercury removal efficiency.
- fly ash,
- adsorption,
- Hg,
- physicochemical property,
- coal-fired flue gas

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References(25)

References

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