Removal of elemental mercury from flue gas by recyclable CuCl2 modified magnetospheres catalyst from fly ash: Part 6. Commercial scale demonstration at a 1000MWth coal-fired power plant

Xiao, Rihong; Gao, Tian; Cui, Xiangzheng; Ji, Yushan; Zhang, Yili; Chuai, Xing; Xiong, Zhuo; Yong-jin, Liao; Gu, Hongbai; Yang, Jianping; Zhang, Junying; Zhao, Yongchun

doi:10.1016/j.fuel.2021.122219

Cited by 25 publications

(9 citation statements)

References 44 publications

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“…Performance of CuCl 2 /MF at a 1000 MW industrial-scale power station was also tested. 36 Overall Hg 0 capture efficiency of 98.7% and mercury recovery rate of 52.8% were attained under optimal conditions combined with available pollutant removing equipment. Mercury emission from the stack could be reduced to 0.334 μg/m 3 associated with Hg 0 capture efficiency of 89.8%.…”

Section: Copper Chloridementioning

confidence: 91%

Copper-Based Sorbents and Catalysts for Elemental Mercury Removal from Gas Stream: A Review

Liu

2023

Ind. Eng. Chem. Res.

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Mercury emission has become a global concern due to the potential risks Hg poses to human health and the environment. Currently, copper-based compounds, such as CuCl 2 , CuO, CuS, and CuSe, have attracted great attention in mercury emission control, because of their low cost and decent removal efficiency. This review provides an overview of the recent progress on adsorptive and catalytic oxidation removal of elemental mercury over copper-based composites. Supported CuCl 2 can majorly serve as an inexpensive and efficient catalyst toward Hg 0 oxidation. Nevertheless, the high volatility and water solubility of mercury chloride may cause halogen release and a potential leaching risk of mercury, respectively. Due to its superior redox property, CuO is fairly active in Hg 0 oxidation. Metal incorporation can distinctly strengthen the mercury removal performance. However, CuO-based composites can be easily poisoned or suppressed by flue gas constituents owing to the generation of inactive copper sulfates/nitrates or competitive adsorption. CuS-based composites appear to be the most promising sorbents for mercury capture, because of strong Hg 0 affinities and remarkable tolerances to steam and sulfur dioxide. CuSe-based composites show mercury capture performances similar to those of CuS-based composites. However, tedious synthetic processes and expensive Se precursors hinder their industrial implementation.

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Section: Copper Chloridementioning

confidence: 91%

Copper-Based Sorbents and Catalysts for Elemental Mercury Removal from Gas Stream: A Review

Liu

2023

Ind. Eng. Chem. Res.

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“…47 CuCl 2 -modified magnetic beads were injected into a 1000 MWth coal-fired unit, and mercury removal efficiency reached 85.78%. 48 Due to the synergistic effect between different cations, the catalysts with spinel structure showed good performance in Hg 0 removal, and CoMn 2 O 4 spinel had a greater than 95% Hg 0 removal effectiveness at 40−160 °C. 49 Water washing and heat treatment at 450 °C can regenerate Fe− Ti−Mn spinel without significantly affecting its ability to remove mercury.…”

Section: Introductionmentioning

confidence: 95%

“…Magnetic beads prepared from coal ash with magnetic properties modified by H 2 S could achieve 80% mercury removal efficiency at 150 °C . CuCl 2 -modified magnetic beads were injected into a 1000 MWth coal-fired unit, and mercury removal efficiency reached 85.78% . Due to the synergistic effect between different cations, the catalysts with spinel structure showed good performance in Hg 0 removal, and CoMn 2 O 4 spinel had a greater than 95% Hg 0 removal effectiveness at 40–160 °C .…”

Section: Introductionmentioning

confidence: 99%

Review and Perspectives of Mercury Removal by Spinel Compounds

Wang

Liu

et al. 2023

Energy Fuels

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Several preparation methods for current spinel compounds are briefly introduced. The effects of temperature and flue gas components on the removal of Hg 0 over spinel compounds are reviewed. The reaction processes and mechanisms of Hg 0 adsorption, oxidation, and desorption on the surface of spinel compounds are analyzed deeply. The current methods for improving Hg 0 catalytic oxidation performance by spinel-based photocatalytic materials are also introduced. There are two main types of spinel compounds for Hg 0 removal: conventional spinel and loaded spinel compounds. Loaded spinel compounds are favorable for the adsorption and oxidation of Hg 0 due to more active sites and a larger surface area than ordinary spinel compounds. Both O 2 and HCl contribute to Hg 0 removal with Hg 0 oxidation efficiency being sensitive to both O 2 and HCl concentrations. The presence of SO 2 has a detrimental effect on the removal of Hg 0 due to the competition for the active adsorption sites on the surface of catalysts and adsorbents. The impact of temperature is bidirectional, and an optimum temperature exists. Based on the analysis of three stages (adsorption, oxidation, and desorption) included in the Hg 0 catalytic oxidation process, it was discovered that for most catalysts the Hg 0 oxidation process is the rate-limiting step for the reaction.

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“…Highly dispersed catalysts are favorable for exposing more active sites, increasing the contact surface area with the treated gas, and promoting efficient SCR reactions. 22 3.2.3 XPS. To further investigate the atomic composition and elemental speciation on the surface of catalysts, XPS characterization was performed on Mn/g-Al 2 O 3 and V-Mn/g-Al 2 O 3 .…”

Section: Catalytic Performance Testmentioning

confidence: 99%