Gaseous elemental mercury removal through heterogeneous Fenton-like processes using novel magnetically separable Cu0.3Fe2.7−Ti O4 catalysts

Zhou, Can; Wang, Ben; Ma, Chuan; Song, Zijian; Zeng, Zhongming; Xiang, Jun; Hu, Song; Su, Sheng; Sun, Lushi

doi:10.1016/j.fuel.2015.08.041

Cited by 14 publications

(3 citation statements)

References 34 publications

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“…The peaks at 710.83 and 724.32 eV of HC are attributed to Fe 2p 3/2 and Fe 2p 1/2 orbits, respectively, indicating that the Fe element mainly exists as a chemical state of Fe 3+ . The Fe 2p XPS spectra of SHC show two components located at around 711.32 and 713.02 eV, which are attributed to the presence of Fe 2+ and Fe 3+ species on the SHC surface . Moreover, the signal around 715.48 eV is expected to be Fe 2+ .…”

Section: Resultsmentioning

confidence: 97%

“…Figure b shows the Fe 2p XPS results of the as‐prepared SHC before and after the first run of Fenton reaction. It is clear that the Fe 2p XPS spectra of SHC after the first run show the peaks at 711.32 and 715.48 eV and peaks at 712.49 and 726.79 eV, which are assigned to the Fe 2+ and Fe 3+ species on the SHC surface, respectively. In comparison with the Fe 2p XPS spectra of SHC before the first run, it is found that the intensity of the Fe 2+ peaks decrease tremendously, whereas the intensity of the Fe 3+ peaks increases dramatically, indicating that during the Fenton reaction of SHC, a portion of the Fe 2+ ions are leached out and result in an exposure of the inherent Fe 3+ on the surface of SHC.…”

Section: Resultsmentioning

confidence: 99%

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A low‐cost clay‐based heterogeneous Fenton‐like catalyst: Activation, efficiency enhancement, and mechanism study

Liu

et al. 2017

Asia-Pacific J Chem Eng

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In this work, Hangjin2# clay (HC), a natural iron‐contained clay mineral first discovered in Inner Mongolia of China, is found to be able to catalyze the heterogeneous Fenton reaction efficiently upon rational modification. After activation using dilute sulfuric acid, the HC prohibited a significantly enhanced activity for heterogeneous Fenton reaction. Via acid activation process, Fe2+/Fe3+ redox can be introduced on the surface of sulfuric acid‐activated Hangjin2# clay (SHC), and Brønsted acid sites can be also created on the surface of SHC. Furthermore, Brønsted acid sites could effectively promote the generation of •OH for methyl orange (MO) oxidation and facilitate the Fe3+/Fe2+ redox process. Fenton degradation of MO was used to evaluate the effect of acid activation on the catalytic activities of SHC. Experimental results revealed that the high activity of SHC was mainly attributed to the synergetic effect of the abundant acid sites on catalyst surface and the Fe3+/Fe2+ redox process. In addition, quenching studies confirmed that •OH radicals were principally responsible for the degradation of MO. More importantly, MO degradation for 3 consecutive cycles demonstrated SHC exhibited reusable and stable activity.

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Section: Resultsmentioning

confidence: 97%

Section: Resultsmentioning

confidence: 99%

A low‐cost clay‐based heterogeneous Fenton‐like catalyst: Activation, efficiency enhancement, and mechanism study

Liu

et al. 2017

Asia-Pacific J Chem Eng

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“…To date, advanced oxidation processes related to the production of highly reactive species hydroxyl radicals ( • OH) have suggested a promising Hg 0 removal performance from coal-fired flue gas. − Yang et al proposed a new method of Hg 0 catalytic oxidation on the surface of single-atom catalysts with the oxidant H 2 O 2 and found that H 2 O 2 dissociated into active • OH species, which could effectively promote Hg 0 removal . Wang et al reported that • OH oxidation absorption technology could efficiently oxidize Hg 0 into Hg 2+ .…”

Section: Introductionmentioning

confidence: 99%

Fe Foam/Electroactivated Peroxydisulfate: A Highly Efficient Method to Remove Elemental Mercury

Zhang

Song

et al. 2023

Energy Fuels

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The removal of elemental mercury (Hg0) from simulated flue gas using the method of Fe foam/electroactivated peroxydisulfate (EA PDS) was carried out in an electrocatalytic reactor. Various factors including the voltage level, PDS concentration, temperature, electrolyte, initial pH, NO, and SO2 were considered to obtain optimized experimental parameters. It was found that approximately 95% of Hg0 was removed under optimal conditions: a voltage of 3 V, 2 mM of PDS, a reaction temperature of 20 °C, and pH = 7. NO would enhance the EA performance, while SO2 slightly inhibited the Hg0 removal activity. In addition, the stability of the Fe foam electrode was confirmed by a long-term experiment and indicated that the Fe foam electrode is efficient. The electrical energy consumption in the Fe foam/EA PDS system for Hg0 oxidation was estimated to be low. Meanwhile, scanning electron microscopy, energy-dispersive spectrometry, and X-ray diffraction obviously revealed the consumption of Fe foam and the production of Fe3O4. Scavenger experiments identified that SO4 •– and •OH were the main reactive radicals. Based on characterizations and experiments, the pathway and mechanism for enhanced Hg0 removal were proposed.

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Removal of Hg0, NO, and SO2 by the surface dielectric barrier discharge coupled with Mn/Ce/Ti-based catalyst

Wang

Yang

Song

et al. 2021

Environ Sci Pollut Res

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Gaseous elemental mercury removal through heterogeneous Fenton-like processes using novel magnetically separable Cu0.3Fe2.7−Ti O4 catalysts

Cited by 14 publications

References 34 publications

A low‐cost clay‐based heterogeneous Fenton‐like catalyst: Activation, efficiency enhancement, and mechanism study

A low‐cost clay‐based heterogeneous Fenton‐like catalyst: Activation, efficiency enhancement, and mechanism study

Fe Foam/Electroactivated Peroxydisulfate: A Highly Efficient Method to Remove Elemental Mercury

Removal of Hg0, NO, and SO2 by the surface dielectric barrier discharge coupled with Mn/Ce/Ti-based catalyst

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