Experimental Study on the Elemental Mercury Removal Performance and Regeneration Ability of CoO<i><sub>x</sub></i>–FeO<i><sub>x</sub></i>-Modified ZSM-5 Adsorbents
Herein, a series of Co-Fe mixed oxide modified ZSM-5 adsorbents were synthesized using the ultrasonic-assisted impregnation method for the capture of elemental mercury. In comparison with other samples, Co<sub>4</sub>Fe<sub>1</sub>-ZSM-5 produced a relatively better performan...
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MDPI AG
2022-04-01
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| Online Access: | https://www.mdpi.com/2076-3417/12/8/3769 |
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| author | Wei Ma Dong Ye Haining Wang |
| author_facet | Wei Ma Dong Ye Haining Wang |
| author_sort | Wei Ma |
| collection | DOAJ |
| description | Herein, a series of Co-Fe mixed oxide modified ZSM-5 adsorbents were synthesized using the ultrasonic-assisted impregnation method for the capture of elemental mercury. In comparison with other samples, Co<sub>4</sub>Fe<sub>1</sub>-ZSM-5 produced a relatively better performance, with the removal efficiency of around 96.6% Hg<sup>0</sup> and the adsorption capacity of around 901.63 ug/mg Hg<sup>0</sup> achieved at 120 °C. The interaction between CoO<i><sub>x</sub></i> and FeO<i><sub>x</sub></i> improved the reducibility of oxygen species, thus promoting the oxidation of Hg<sup>0</sup>. Among a variety of other gas components, O<sub>2</sub> and NO exerted a positive effect on Hg<sup>0</sup>, which improved its removal to a certain extent. By contrast, SO<sub>2</sub> caused an adverse effect on the capture of Hg<sup>0</sup>, which could be reversed to some degree by the introduction of 5% O<sub>2</sub>. After five cycles, the mercury removal efficiency of Co<sub>4</sub>Fe<sub>1</sub>-ZSM-5 remained above 90%, suggesting excellent recyclability. Finally, XPS analysis was conducted to reveal that Mars–Maessen mechanisms are dominant in the process of mercury adsorption. |
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| last_indexed | 2024-03-09T11:13:24Z |
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| spelling | doaj.art-dfe11ad80b974488808bbbb5d5fff8212023-12-01T00:38:18ZengMDPI AGApplied Sciences2076-34172022-04-01128376910.3390/app12083769Experimental Study on the Elemental Mercury Removal Performance and Regeneration Ability of CoO<i><sub>x</sub></i>–FeO<i><sub>x</sub></i>-Modified ZSM-5 AdsorbentsWei Ma0Dong Ye1Haining Wang2College of Quality & Safety Engineering, China Jiliang University, Hangzhou 310018, ChinaCollege of Quality & Safety Engineering, China Jiliang University, Hangzhou 310018, ChinaCollege of Quality & Safety Engineering, China Jiliang University, Hangzhou 310018, ChinaHerein, a series of Co-Fe mixed oxide modified ZSM-5 adsorbents were synthesized using the ultrasonic-assisted impregnation method for the capture of elemental mercury. In comparison with other samples, Co<sub>4</sub>Fe<sub>1</sub>-ZSM-5 produced a relatively better performance, with the removal efficiency of around 96.6% Hg<sup>0</sup> and the adsorption capacity of around 901.63 ug/mg Hg<sup>0</sup> achieved at 120 °C. The interaction between CoO<i><sub>x</sub></i> and FeO<i><sub>x</sub></i> improved the reducibility of oxygen species, thus promoting the oxidation of Hg<sup>0</sup>. Among a variety of other gas components, O<sub>2</sub> and NO exerted a positive effect on Hg<sup>0</sup>, which improved its removal to a certain extent. By contrast, SO<sub>2</sub> caused an adverse effect on the capture of Hg<sup>0</sup>, which could be reversed to some degree by the introduction of 5% O<sub>2</sub>. After five cycles, the mercury removal efficiency of Co<sub>4</sub>Fe<sub>1</sub>-ZSM-5 remained above 90%, suggesting excellent recyclability. Finally, XPS analysis was conducted to reveal that Mars–Maessen mechanisms are dominant in the process of mercury adsorption.https://www.mdpi.com/2076-3417/12/8/3769Hg<sup>0</sup> adsorptionZSM-5cobalt oxideiron oxideregeneration |
| spellingShingle | Wei Ma Dong Ye Haining Wang Experimental Study on the Elemental Mercury Removal Performance and Regeneration Ability of CoO<i><sub>x</sub></i>–FeO<i><sub>x</sub></i>-Modified ZSM-5 Adsorbents Applied Sciences Hg<sup>0</sup> adsorption ZSM-5 cobalt oxide iron oxide regeneration |
| title | Experimental Study on the Elemental Mercury Removal Performance and Regeneration Ability of CoO<i><sub>x</sub></i>–FeO<i><sub>x</sub></i>-Modified ZSM-5 Adsorbents |
| title_full | Experimental Study on the Elemental Mercury Removal Performance and Regeneration Ability of CoO<i><sub>x</sub></i>–FeO<i><sub>x</sub></i>-Modified ZSM-5 Adsorbents |
| title_fullStr | Experimental Study on the Elemental Mercury Removal Performance and Regeneration Ability of CoO<i><sub>x</sub></i>–FeO<i><sub>x</sub></i>-Modified ZSM-5 Adsorbents |
| title_full_unstemmed | Experimental Study on the Elemental Mercury Removal Performance and Regeneration Ability of CoO<i><sub>x</sub></i>–FeO<i><sub>x</sub></i>-Modified ZSM-5 Adsorbents |
| title_short | Experimental Study on the Elemental Mercury Removal Performance and Regeneration Ability of CoO<i><sub>x</sub></i>–FeO<i><sub>x</sub></i>-Modified ZSM-5 Adsorbents |
| title_sort | experimental study on the elemental mercury removal performance and regeneration ability of coo i sub x sub i feo i sub x sub i modified zsm 5 adsorbents |
| topic | Hg<sup>0</sup> adsorption ZSM-5 cobalt oxide iron oxide regeneration |
| url | https://www.mdpi.com/2076-3417/12/8/3769 |
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