Review on Theoretical Research of the Catalytic Oxidation of Hg0 in Coal-Fired Flue Gas

doi:10.11930/j.issn.1004-9649.201611113

Abstract

Abstract: Mercury is one of the heavy metal element pollution in the flue gas of coal-fired power generation, with elemental mercury (Hg⁰), oxidized mercury (Hg²⁺) and particulate mercury (Hg^P) as its main existing forms. Since Hg⁰ is difficult to be removed, it is usually oxidized to Hg²⁺, which can be removed easily with the help of catalysts. Hg⁰ oxidation catalyst can be divided into three major types according to their different sources and functions, i.e., coal-fired fly ash, conventional Hg⁰ oxidation catalyst, and cooperative de-NO_X and Hg-removal catalyst. In this paper, the present status of the density functional theory (DFT) study of oxidation reaction of Hg⁰ under different catalysts is reviewed. Then the mechanisms of adsorption and oxidation reaction of Hg⁰ on various catalysts are summarized and the contents and results of some similar studies are compared. In addition, the deficiency of the current research is pointed out and the future development trend of DFT calculation study of Hg⁰ oxidation catalyst is put forward.

Key words: Coal-fired plant, Hg emission, Hg removal, Hg⁰, catalytic oxidation of Hg, Density Functional Theory

CLC Number:

TK621
X501

ZHAO Li, LIU Yu, WU Yangwen, ZHUANG Ke, LU Qiang. Review on Theoretical Research of the Catalytic Oxidation of Hg⁰ in Coal-Fired Flue Gas[J]. Electric Power, 2018, 51(3): 170-176.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.201611113

https://www.electricpower.com.cn/EN/Y2018/V51/I3/170

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Review on Theoretical Research of the Catalytic Oxidation of Hg⁰ in Coal-Fired Flue Gas

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