Hg0 removal from flue gas by ionic liquid/H2O2

Cheng, Guangwen; Bai, Bofeng; Zhang, Qiang; Cai, Mingxuan

doi:10.1016/j.jhazmat.2014.09.007

Cited by 22 publications

(15 citation statements)

References 55 publications

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“…It has been reported that the presence of Cl − can accelerate the oxidation of Hg 0 in the oxidation reaction system. Furthermore, there will be some new products, such as ClHgSO 3 − and Cl 2 HgSO 3 2− , which would slow down the reduction of Hg 2+ and then slow down the release process of Hg 0 . All of these are conducive to the improvement of Hg removal efficiency.…”

Section: Resultsmentioning

confidence: 99%

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A novel semi‐dry method for the simultaneous removal of Hg and SO₂ using spray drying absorption method

et al. 2020

J of Chemical Tech & Biotech

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BACKGROUND A novel semi‐dry method called SDA (spray drying absorption) for the simultaneous removal of mercury (Hg0) and sulfur dioxide (SO2) have been proposed in this article, in which Hg0 was initially oxidized by gaseous oxidant (O3) and liquid oxidant (K2S2O8, H2O2, and NaClO2), after which SO2 and Hg2+ were absorbed by Ca(OH)2. RESULTS The effects on different process conditions and additives on Hg0 removal were explored at first, and the results indicated that the Hg removal efficiency could be improved by oxidizing or extending the residence time of the liquid phase reaction. When SO2 and Hg coexist in the atmosphere, additives including oxidants or composite additives were added into the mixed system, and the results indicated that the best removal efficiency of SO2 and Hg was about 99.5% and 51% respectively. CONCLUSION Since SO2 has good water solubility, it would affect the oxidation of Hg and the removal of Hg. When there was nitric oxide (NO) in the atmosphere, a new stable product was generated which contributed to the removal of Hg, and the removal efficiency of SO2 and Hg was about 99.5% and 57% respectively. © 2020 Society of Chemical Industry

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Section: Resultsmentioning

confidence: 99%

“…down the release process of Hg 0 . 27 All of these are conducive to the improvement of Hg removal efficiency.…”

mentioning

confidence: 99%

A novel semi‐dry method for the simultaneous removal of Hg and SO₂ using spray drying absorption method

et al. 2020

J of Chemical Tech & Biotech

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“…When the concentration of (NH4)2S solution increased from 0 to 0.8 mol/L, the removal efficiencies of Hg 2+ , Hg 0 and As could reach 96%, 85% and 95.2%, respectively. We can see from equations (3)(4)(5)(6)(7)(8)(9)(10)(11), when the concentration of (NH4)2S solution increased, the concentration of S 2-, S and H2S increased too. They could react with Hg 2+ , Hg 0 , As and generated HgS, As2S3, As2S5 precipitation.…”

Section: Sample Characterizationmentioning

confidence: 99%

“…Mercury in the flue gas primarily exists in three forms: elemental (Hg 0 ), oxidized, and particulate-bound mercury. [6] The oxidized and particulate-bound mercury can be effectively removed by wet flue gas desulfurization (FGD) facilities. [6] Elemental mercury (Hg 0 ) is extremely difficult to control because of its high volatility and low solubility.…”

Section: Introductionmentioning

confidence: 99%

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Removal of mercury (II), elemental mercury and arsenic from simulated flue gas by ammonium sulphide

Ning

Guo

Wang

et al. 2015

Environmental Technology

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A tubular resistance furnace was used as a reactor to simulate mercury and arsenic in smelter flue gases by heating mercury and arsenic compounds. The flue gas containing Hg(2+), Hg(0) and As was treated with ammonium sulphide. The experiment was conducted to investigate the effects of varying the concentration of ammonium sulphide, the pH value of ammonium sulphide, the temperature of ammonium sulphide, the presence of SO2 and the presence of sulphite ion on removal efficiency. The prepared adsorption products were characterized by Fourier transform infrared spectroscopy, X-ray diffraction, X-ray photoelectron spectroscopy and scanning electron microscopy. The results showed that the optimal concentration of ammonium sulphide was 0.8 mol/L. The optimal pH value of ammonium sulphide was 10, and the optimal temperature of ammonium sulphide was 20°C.Under the optimum conditions, the removal efficiency of Hg(2+), Hg(0) and As could reach 99%, 88.8%, 98%, respectively. In addition, SO2 and sulphite ion could reduce the removal efficiency of mercury and arsenic from simulated flue gas.

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Biological treatments of mercury and nitrogen oxides in flue gas: biochemical foundations, technological potentials, and recent advances

Huang

Wei

Tang

et al. 2021

Advances in Applied Microbiology

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Hg0 removal from flue gas by ionic liquid/H2O2

Cited by 22 publications

References 55 publications

A novel semi‐dry method for the simultaneous removal of Hg and SO₂ using spray drying absorption method

A novel semi‐dry method for the simultaneous removal of Hg and SO₂ using spray drying absorption method

Removal of mercury (II), elemental mercury and arsenic from simulated flue gas by ammonium sulphide

Biological treatments of mercury and nitrogen oxides in flue gas: biochemical foundations, technological potentials, and recent advances

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Hg0 removal from flue gas by ionic liquid/H2O2

Cited by 22 publications

References 55 publications

A novel semi‐dry method for the simultaneous removal of Hg and SO2 using spray drying absorption method

A novel semi‐dry method for the simultaneous removal of Hg and SO2 using spray drying absorption method

Removal of mercury (II), elemental mercury and arsenic from simulated flue gas by ammonium sulphide

Biological treatments of mercury and nitrogen oxides in flue gas: biochemical foundations, technological potentials, and recent advances

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Product

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A novel semi‐dry method for the simultaneous removal of Hg and SO₂ using spray drying absorption method

A novel semi‐dry method for the simultaneous removal of Hg and SO₂ using spray drying absorption method