Elemental mercury oxidation from flue gas by microwave catalytic oxidation over Mn/γ-Al2O3

Wei, Zaishan; Luo, Yingxin; Li, B.R.; Chen, Z.Y.; Ye, Q.H.; Huang, Qianru; He, J.C.

doi:10.1016/j.jiec.2014.10.002

Cited by 31 publications

(4 citation statements)

References 26 publications

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“…They found that the presence of HCl promotes Hg oxidation and both HCl and Hg are adsorbed on the surface of MnO x /Al 2 O 3 . In addition, kinetics model based on L-H mechanism well describes the Hg oxidation reaction between Hg and ozone molecule over MnO x /Al 2 O 3 [40], which suggests that Hg and oxidizing agent tend to be co-adsorbed on the adjacent active sites and L-H mechanism may apply to describe Hg oxidation reaction on MnO x -based catalysts.…”

Section: Reaction Mechanism Of Hg Oxidation By Hcl Over Mno 2 Surfacementioning

confidence: 82%

Oxidation mechanism of elemental mercury by HCl over MnO2 catalyst: Insights from first principles

Zhang

Liu

Yang

et al. 2015

Chemical Engineering Journal

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Section: Reaction Mechanism Of Hg Oxidation By Hcl Over Mno 2 Surfacementioning

confidence: 82%

Oxidation mechanism of elemental mercury by HCl over MnO2 catalyst: Insights from first principles

Zhang

Liu

Yang

et al. 2015

Chemical Engineering Journal

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“…However, microwave-induced oxidation technologies may not be suitable for water treatment because most of the microwave energy will be consumed in water heating and evaporation, instead of activating oxidants. In the field of flue gas purification, a few scholars − tried to use adsorbents/catalysts with microwave radiation to remove pollutants from flue gas. However, these kinds of technologies are not further developed and applied.…”

Section: Introductionmentioning

confidence: 99%

Novel Simultaneous Removal Technology of NO and SO₂ Using a Semi-Dry Microwave Activation Persulfate System

Liu

Wang

2020

Environ. Sci. Technol.

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As it has a simple system and a small floor area, flue gas simultaneous desulfurization and denitrification technology has a good development prospect, and related research has become a hot topic in the field of flue gas purification. In this work, a novel simultaneous removal technology of NO and SO 2 from flue gas using a semi-dry microwave activation persulfate system was developed for the first time. A series of experiments and characterization analyses had been implemented to research the feasibility of this new flue gas purification technology. The oxidation products, free radicals, and mechanism of NO and SO 2 simultaneous removal were revealed. The effect of the main technological parameters on NO and SO 2 simultaneous removal was also studied. Relevant results demonstrated that an increase in the microwave radiation power, persulfate concentration, and O 2 concentration enhanced NO and SO 2 simultaneous removal. The increase of NO and SO 2 concentrations weakened NO and SO 2 simultaneous removal. The reagent dosage, pH value of the solution, and reaction temperature showed a dual influence on NO and SO 2 simultaneous removal. Free-radical capture experiments revealed that both SO 4 −• and • OH that were produced by microwave activation of persulfate were the major active species and played very key roles in NO and SO 2 simultaneous removal. The main products (sulfate and nitrate) and byproducts (NO 2 ) in the tail gas were found. The process application and product post-treatment routes were also proposed. The result may provide the necessary inspiration and guidance for the development and application of microwave-activated advanced oxidation technology in the flue gas treatment area.

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“…Transition metal oxides have a lower cost than precious metals, and their catalytic oxidation of Hg 0 has been extensively studied. [12][13][14][15][16][17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Removal of Mercury from Coal-Fired Flue Gas and Its Sulfur Tolerance Characteristics by Mn, Ce Modified γ-Al₂O₃ Catalyst

Xie

Wang

et al. 2020

Journal of Chemistry

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Mercury pollution in the atmospheric environment is a matter of international concern. Mercury in coal-fired flue gas is the first human mercury emission source and has become the focus of national mercury pollution control. The catalytic performance of zerovalent mercury (Hg0) in coal-fired flue gas was studied by using manganese-cerium-aluminum oxide as catalyst. The effects of metal loading ratio, reaction temperature, calcination temperature, and O2 and SO2 concentration on the efficiency of Hg0 catalytic removal were investigated, and the Mn-Ce/γ-Al2O3 catalysts before and after the reaction were characterized by BET, SEM, XRD, and XPS to analyze the physicochemical properties of the samples. The results show that the mercury removal efficiency of the composite catalyst with Mn, Ce, and Al as the active component is higher than that of the single metal catalyst. The catalytic activity of Mn0.1Ce0.02Al is the best, the optimum reaction temperature is 150°C, the optimum calcination temperature is 400°C, and the O2 concentration in the conventional flue gas condition satisfies the effective oxidation of Hg0; SO2 in the flue gas can seriously inhibit the oxidation of Hg0.

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Elemental mercury oxidation from flue gas by microwave catalytic oxidation over Mn/γ-Al2O3

Cited by 31 publications

References 26 publications

Oxidation mechanism of elemental mercury by HCl over MnO2 catalyst: Insights from first principles

Oxidation mechanism of elemental mercury by HCl over MnO2 catalyst: Insights from first principles

Novel Simultaneous Removal Technology of NO and SO₂ Using a Semi-Dry Microwave Activation Persulfate System

Removal of Mercury from Coal-Fired Flue Gas and Its Sulfur Tolerance Characteristics by Mn, Ce Modified γ-Al₂O₃ Catalyst

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Elemental mercury oxidation from flue gas by microwave catalytic oxidation over Mn/γ-Al2O3

Cited by 31 publications

References 26 publications

Oxidation mechanism of elemental mercury by HCl over MnO2 catalyst: Insights from first principles

Oxidation mechanism of elemental mercury by HCl over MnO2 catalyst: Insights from first principles

Novel Simultaneous Removal Technology of NO and SO2 Using a Semi-Dry Microwave Activation Persulfate System

Removal of Mercury from Coal-Fired Flue Gas and Its Sulfur Tolerance Characteristics by Mn, Ce Modified γ-Al2O3 Catalyst

Contact Info

Product

Resources

About

Novel Simultaneous Removal Technology of NO and SO₂ Using a Semi-Dry Microwave Activation Persulfate System

Removal of Mercury from Coal-Fired Flue Gas and Its Sulfur Tolerance Characteristics by Mn, Ce Modified γ-Al₂O₃ Catalyst