Mechanism of Hg<sup>2+</sup> reduction in wet flue gas desulfurization liquors

ZHAO Li; HE Qing-song; LIU Yu; WU Yang-wen; LU Qiang; LIU Song-tao; DONG Chang-qing

Volume 45 Issue 6

Jun. 2017

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Article Navigation > Journal of Fuel Chemistry and Technology > 2017 > 45(6): 755-760

ZHAO Li, HE Qing-song, LIU Yu, WU Yang-wen, LU Qiang, LIU Song-tao, DONG Chang-qing. Mechanism of Hg2+ reduction in wet flue gas desulfurization liquors[J]. Journal of Fuel Chemistry and Technology, 2017, 45(6): 755-760.

Citation:

ZHAO Li, HE Qing-song, LIU Yu, WU Yang-wen, LU Qiang, LIU Song-tao, DONG Chang-qing. Mechanism of Hg²⁺ reduction in wet flue gas desulfurization liquors[J]. Journal of Fuel Chemistry and Technology, 2017, 45(6): 755-760.

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Mechanism of Hg²⁺ reduction in wet flue gas desulfurization liquors

1.
National Engineering Laboratory for Biomass Power Generation Equipment, North China Electric Power University, Beijing 102206, China
2.
Department of Environmental Science and Engineering, North China Electric Power University, Baoding 071003, China

Funds:

the Major State Basic Research Development Program of China 973 project

the Major State Basic Research Development Program of China 2015CB251501

Science and Technology Project of Hebei Province 15273706D

Fundamental Research Funds for the Central Universities 2015ZD24

Received Date: 2017-01-06
Rev Recd Date: 2017-04-12

Available Online: 2021-01-23

Publish Date: 2017-06-10

Abstract

Abstract

Given the easy reduction of Hg²⁺ in wet desulfurization slurry in a power plant, migration mechanism of Hg²⁺ in a simulated system was studied. Influences of several experimental parameters including slurry temperature, pH value and concentrations of SO₃^2-, Cl^-, Ca²⁺ and Mg²⁺ were investigated separately. The results indicate that the increase of SO₃^2- concentration lowers the reduction rate of Hg²⁺, while the rise of slurry temperature leads to an opposite result. The effect of pH value shows a trend of first increase and then decrease, and reaches the highest reduction rate at pH value of 5.5. Moreover, the rise of Ca²⁺, Mg²⁺ and Cl^- concentrations could inhibit the reduction of Hg²⁺.
- Hg²⁺ reduction,
- pH value,
- slurry temperature,
- ion concentration,
- wet desulfurization

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References(28)

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