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Progress in Chemistry 2017, Vol. 29 Issue (12): 1435-1445 DOI: 10.7536/PC171021 Previous Articles   Next Articles

• Review •

Mercury Removal Technologies of the Flue Gas from Power Plants

Wenbo Zhang, Fangqin Li, Jiang Wu*, Hexing Li*   

  1. College of Energy and Mechanical Engineering, Shanghai University of Electric Power, Shanghai 200090, China
  • Received: Revised: Online: Published:
  • Supported by:
    The work was supported by the National Natural Science Foundation of China (No. 21237003, 50806041).
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With the emission regulation for dust, SO2, NOx, Hg and other pollutants from coal-fired power plants becoming more stringent, the purification of flue gas from power plants has become a very popular area of research. The toxicity of mercury is causing widespread concern for flue gas mercury removal. The key to the study of flue gas mercury removal technology is the efficient conversion and removal of elemental mercury. Activated carbon injection is a mature technology, among the flue gas mercury removal technology, however its cost is too high. The fly ash of flue gas has a certain adsorption effect on mercury, furthermore, its adsorption performance can be improved through modification. Advanced oxidation, especially photocatalytic technology, has attracted increasing attention. Titanium-based, bismuth-based and other photocatalyst have better mercury removal efficiency under low temperature conditions, and it is becoming an important aspect of flue gas mercury oxidation and emission reduction. To realize the combined removal of SO2, NOx, Hg and other pollutants by the optimization operation of existing flue gas purification equipment, is the direction of research and industrial application of mercury purification in power plant, and the scientific problem is the source of promoting the research and application of flue gas purification technology.
Contents
1 Introduction
2 Mercury removal technologies of the flue gas from power plants
2.1 Adsorption
2.2 Photocatalytic oxidation
2.3 Low temperature plasma
2.4 Combined removal of mercury with various pollutants
3 Conclusion and outlook
Key words: coal-fired power plants, flue gas mercury removal, activated carbon adsorbent, fly ash adsorbent, photocatalytic technology, multi-pollutant combined removal

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