Technology for mercury removal from flue gas of coal based thermal power plants: A comprehensive review

Balasundaram, Karthik; Sharma, Mukesh

doi:10.1080/10643389.2019.1583050

Cited by 25 publications

(14 citation statements)

References 219 publications

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“…Reduction of anthropogenic mercury emissions is an objective in most of the international efforts towards a sustainable economy, such as the Minamata, Rotterdam and Basel conventions. [13][14][15][16][17] Anthropogenic mercury emissions will depend on future patterns of fossil fuel usage, on uptake of mercury removal technologies 18 and on continuing implementation of mercury reduction policies. 7a However, more mercury pollution is caused by artisanal and small-scale gold mining (ASGM) than any other human activity.…”

Section: Introductionmentioning

confidence: 99%

Colorimetric detection of Hg²⁺ with an azulene-containing chemodosimeter via dithioacetal hydrolysis

López-Alled

Murfin

Kociok‐Köhn

et al. 2020

Analyst

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Section: Introductionmentioning

confidence: 99%

Colorimetric detection of Hg²⁺ with an azulene-containing chemodosimeter via dithioacetal hydrolysis

López-Alled

Murfin

Kociok‐Köhn

et al. 2020

Analyst

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“…Indeed, the strong interaction of CTHP-SES with the soft to borderline soft cations: Hg 2+ , Pb 2+ , Cd 2+ and Cu 2+ as and the trivial interaction with CTHP-SES to the hard cations such as K + , Ca 2+ and Mg 2+ are characteristic to sulfur-rich networks. 45 The operational pH range of an absorbent is a crucial parameter in the industrialization process. Therefore, the performance of CTHP-SES at pH values of 0, 4, 5.5, 7, 9, and 14 was studied.…”

Section: Resultsmentioning

confidence: 99%

Sulfur-Decorated Hyper-Cross-Linked Coal Tar: A Microporous Organic Polymer for Efficient and Expeditious Mercury Removal

Ramezani

Ozdemir

Khosropour

et al. 2020

ACS Appl. Mater. Interfaces

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Hyper-cross-linked microporous organic polymers are a class of porous materials that have captured widespread attention owing to their high surface areas and wide range of monomeric sources. Balancing economy with performance is the initial hurdle when designing effective hyper-cross-linked microporous organic polymers. Herein, we demonstrated an inexpensive sulfurated solvent-knitted hyper-cross-linked microporous polymer scaffold, named sulfur-decorated hyper-cross-linked coal tar (CTHP-SES), utilizing coal tar as an aromatic monomer with numerous positions for potential chelation of toxic metals, particularly mercury, from water. The resulting material illustrated selective adsorption of mercury from both water (1037 mg g −1 ) and the gas phase (416 mg g −1 ) with rapid kinetics (183.67 mg min −1 g −1 ), good recyclability (4 runs), and excellent stability under both strong basic and acidic conditions. CTHP-SES was able to reduce the concentration of the Hg(II) solution from 1 mg L −1 to 32 μg L −1 after 10 min due in part to the promising distribution coefficient (K d = 2.371 × 10 6 mL g −1 ). These results show that CTHP-SES offers a promising and practical platform to cope with a variety of environmental contaminations.

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“…Additional • OH ions were generated when the introduced metal ions increased H 2 O 2 decomposition, resulting in the oxidization of Hg 0 to Hg 2+ . 7 Acidic potassium permanganate solution, commonly used as an absorbent for the Ontario Hydro method, readily oxidizes Hg 0 . 9 However, higher costs are incurred when capturing Hg 0 with Fenton reagent, Fenton-like reagent, or acidic potassium permanganate solution.…”

Section: Introductionmentioning

confidence: 99%

Effects of Chlorine Addition on Nitrogen Oxide Reduction and Mercury Oxidation over Selective Catalytic Reduction Catalysts

et al. 2022

ACS Omega

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The effect of chlorine on mercury oxidation and nitrogen oxides (NO x ) reduction over selective catalytic reduction (SCR) catalysts was investigated in this study. Commercial SCR catalysts achieved a high Hg 0 oxidation efficiency when Cl 2 was sprayed into the flue gas. Results indicated that an appropriate concentration of Cl 2 was found to promote NO x reduction and Hg 0 oxidation significantly. An optimal concentration of Cl 2 (25 ppm) was found to significantly promote NO x reduction and Hg 0 oxidation. Moreover, we studied the effects of Cl 2 on NO x reduction and Hg 0 oxidation over SCR catalysts under different concentrations of SO 2 . The SO 2 poisoning effect was decreased by Cl 2 when the SO 2 concentration was low (below 1500 ppm). However, sulfate gradually covered the catalyst surface over time during the reaction, which limited the impact of Cl 2 . Finally, different sulfur-poisoned catalysts were examined in the presence of Cl 2 . The NO x reduction and Hg 0 oxidation performances of sulfate-poisoned catalysts improved when Cl 2 was added to the flue gas. Mechanisms for NO x reduction and Hg 0 oxidation over fresh catalysts and sulfate-poisoned catalysts in the presence of Cl 2 were proposed in this study. The mechanism of Cl 2 -influenced NO x reduction was similar to that for the NH 3 -SCR process. With Cl 2 in the flue gas, the number of Brønsted active sites increased, which improved catalytic activity. Furthermore, Cl 2 reoxidized V 4+ –OH to V 5+ =O and caused the NH 3 -SCR process to operate continuously. The Langmuir–Hinshelwood mechanism was followed for Hg 0 oxidation by SCR catalysts when Cl 2 was in the flue gas. Cl 2 increased the number of Lewis active sites, and catalytic activity increased. Hg 0 adsorbed on the surface of the catalysts and was then oxidized to HgCl 2 . Adding Cl 2 to the flue gas increased the strength and number of acid sites on sulfate-poisoned catalysts.

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Technology for mercury removal from flue gas of coal based thermal power plants: A comprehensive review

Cited by 25 publications

References 219 publications

Colorimetric detection of Hg²⁺ with an azulene-containing chemodosimeter via dithioacetal hydrolysis

Colorimetric detection of Hg²⁺ with an azulene-containing chemodosimeter via dithioacetal hydrolysis

Sulfur-Decorated Hyper-Cross-Linked Coal Tar: A Microporous Organic Polymer for Efficient and Expeditious Mercury Removal

Effects of Chlorine Addition on Nitrogen Oxide Reduction and Mercury Oxidation over Selective Catalytic Reduction Catalysts

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Technology for mercury removal from flue gas of coal based thermal power plants: A comprehensive review

Cited by 25 publications

References 219 publications

Colorimetric detection of Hg2+ with an azulene-containing chemodosimeter via dithioacetal hydrolysis

Colorimetric detection of Hg2+ with an azulene-containing chemodosimeter via dithioacetal hydrolysis

Sulfur-Decorated Hyper-Cross-Linked Coal Tar: A Microporous Organic Polymer for Efficient and Expeditious Mercury Removal

Effects of Chlorine Addition on Nitrogen Oxide Reduction and Mercury Oxidation over Selective Catalytic Reduction Catalysts

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Product

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Colorimetric detection of Hg²⁺ with an azulene-containing chemodosimeter via dithioacetal hydrolysis

Colorimetric detection of Hg²⁺ with an azulene-containing chemodosimeter via dithioacetal hydrolysis