Study on removal of elemental mercury from simulated flue gas over activated coke treated by acid

Ma, Jinfeng; Li, Caiting; Zhao, Lingkui; Zhang, Jie; Song, Jingke; Zeng, Guangming; Zhang, Xunan; Xie, Yin’e

doi:10.1016/j.apsusc.2014.11.090

Cited by 73 publications

(42 citation statements)

References 50 publications

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“…Hg p is removed by dust control equipment such as baghouse filters and electrostatic precipitators (ESP). Elemental mercury (Hg 0 ) usually escapes emission control equipment and is emitted to the atmosphere [30,31]. Results from 84 power plants indicate that in total mercury emitted to the atmosphere, 87% is Hg 0 , 5% Hg 2+ and 8% Hg p [32].…”

Section: Introductionmentioning

confidence: 99%

Lignites and subbituminous coals combustion in Polish power plants as a source of anthropogenic mercury emission

Burmistrz

Kogut

Marczak

et al. 2016

Fuel Processing Technology

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Section: Introductionmentioning

confidence: 99%

Lignites and subbituminous coals combustion in Polish power plants as a source of anthropogenic mercury emission

Burmistrz

Kogut

Marczak

et al. 2016

Fuel Processing Technology

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“…First, Hg 0 was absorbed on the AC surface to form Hg 0 (ad). Then, HgCl 2 generated through Hg 0 (ad) reacted with CCl group . The reactions are given as follows:

H {normalg}^{0} + A C \to H {normalg}^{0} true(normala normald true)

H {normalg}^{0} true(normala normald true) + C - C l \to H {normalg}^{} C l + C

H {normalg}^{} C l + C - C l \to H g C {normall}_{2} + C

…”

Section: Resultsmentioning

confidence: 99%

“…In contrast, no obvious peak of Fe 2 O 3 was observed when the concentration of FeCl 3 was 0.1 and 0.15 mol L −1 . According to the monolayer dispersion theory, when the oxide content is in the range of the threshold value, the oxide is in a monolayer dispersion state. However, when the content of oxide exceeds the threshold value, the oxide exists in the form of crystalline phase.…”

Section: Resultsmentioning

confidence: 99%

Adsorption of Gaseous Elemental Mercury by Ferric‐Chloride‐Modified Activated Carbon Under Low‐Temperature Conditions

Wang

Bian

et al. 2018

CLEAN Soil Air Water

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Removal efficiency of elemental mercury (Hg0) over activated carbon (AC) modified with ferric chloride (FeCl3) is investigated at low temperatures. The effects of impregnation concentration, reaction temperature, oxygen content, relative humidity, and hydrogen sulfide (H2S) on Hg0 removal efficiency are investigated. The results indicate that the removal ability of Hg0 can be significantly improved by the introduction of FeCl3. Furthermore, the FeCl3‐modified AC exhibit the best removal efficiency toward Hg0 when the concentration of FeCl3 is 0.15 mol L−1 and reaction temperature is 50 °C. In addition, H2S shows a positive effect on Hg0 removal, while H2O(g) can inhibit the removal of Hg0 due to competitive adsorption. Fe2O3 and CCl are generated on FeCl3‐modified AC (with FeCl3 impregnation concentration of 0.15 mol L−1) catalyst and contribute to Hg0 removal. Moreover, Hg exists mainly in the form of mercuric chloride (HgCl2) and mercuric oxide (HgO) on the surface of the samples. Finally, the removal of Hg0 is achieved through the following two pathways: by the reaction of Hg0 with CCl and reaction of Hg0 with Fe2O3.

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“…The N1s spectrum can be deconvoluted into three peaks centered at 398.4, 400.0, and 402.1 eV, and they can be assigned to the C-N bond, amide group, and N-O or N-N bond, respectively [45][46][47]. The O1s peak at 533.3 eV corresponds to ether-type oxygen produced under complex friction conditions [48].…”

Section: Analysis Of the Worn Surface Of A Lower Steel Disk And Uppermentioning

confidence: 99%

Effects of magnetic ionic liquid as a lubricant on the friction and wear behavior of a steel-steel sliding contact under elevated temperatures

et al. 2019

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A magnetic ionic liquid (abridged as MIL) [C 6 mim] 5 [Dy(SCN) 8 ] was prepared and used as the magnetic lubricant of a steel-steel sliding pair. The tribological properties of the as-prepared MIL were evaluated with a commercially obtained magnetic fluid lubricant (abridged as MF; the mixture of dioctyl sebacate and Fe 3 O 4 , denoted as DIOS-Fe 3 O 4 ) as a control. The lubrication mechanisms of the two types of magnetic lubricants were discussed in relation to worn surface analyses by SEM-EDS, XPS, and profilometry, as well as measurement of the electric contact resistance of the rubbed steel surfaces. The results revealed that the MIL exhibits better friction-reducing and antiwear performances than the as-received MF under varying test temperatures and loads. This is because the MIL participates in tribochemical reactions during the sliding process, and forms a boundary lubrication film composed of Dy 2 O 3 , FeS, FeSO 4 , nitrogen-containing organics, and thioether on the rubbed disk surface, thereby reducing the friction and wear of the frictional pair. However, the MF is unable to form a lubricating film on the surface of the rubbed steel at 25 °C , though it can form a boundary film consisting of Fe 3 O 4 and a small amount of organics under high temperature. Furthermore, the excessive Fe 3 O 4 particulates that accumulate in the sliding zone may lead to enhanced abrasive wear of the sliding pair.

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Study on removal of elemental mercury from simulated flue gas over activated coke treated by acid

Cited by 73 publications

References 50 publications

Lignites and subbituminous coals combustion in Polish power plants as a source of anthropogenic mercury emission

Lignites and subbituminous coals combustion in Polish power plants as a source of anthropogenic mercury emission

Adsorption of Gaseous Elemental Mercury by Ferric‐Chloride‐Modified Activated Carbon Under Low‐Temperature Conditions

Effects of magnetic ionic liquid as a lubricant on the friction and wear behavior of a steel-steel sliding contact under elevated temperatures

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