Study of Hg0 removal characteristics on Fe2O3 with H2S

Liu, Ting; Xue, Lucheng; Guo, Xueyi

doi:10.1016/j.fuel.2015.07.093

Cited by 33 publications

(15 citation statements)

References 33 publications

(37 reference statements)

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“…The weight loss of H 2 S/Fe 2 O 3 before 200 °C might be attributed to the loss of surfaced-absorbed water. 29 The weight loss between 200 and 320 °C corresponds to the sublimation of elemental sulfur, 25 and the main weight loss in the temperature range of 400−600 °C could be attributed to the desorption of FeS x (FeS, FeS 2 , etc.). 30 The result manifests that the H 2 S modification on Fe 2 O 3 is effective and the main active substance generated is probably FeS x .…”

Section: Effect Of Initial Mercury Concentrationmentioning

confidence: 99%

“…Some studies have suggested that H 2 S can boost the mercury removal ability of iron oxide, but the mercury removal ability of Fe 2 O 3 itself is weak relying on physical adsorption. , Tao et al investigated Hg 0 adsorption mechanism on the α-Fe 2 O 3 surface with H 2 S using density functional theory calculations and demonstrated that the Eley–Rideal mechanism is the most suitable reaction process. Liu et al investigated the role of H 2 S on the simultaneous reaction of Hg 0 + H 2 S + Fe 2 O 3 from an experimental perspective and deduced the foundational mercury adsorptive products through the element valence changes before and after the reaction but failed to give the specific reaction process. Wu et al put forward a novel method for Hg 0 removal on iron oxide adsorbents in the coal-derived flue gas, which was based on the reaction of Hg 0 and H 2 S over the sorbents.…”

Section: Introductionmentioning

confidence: 99%

“…22,23 Tao et al 24 investigated Hg 0 adsorption mechanism on the α-Fe 2 O 3 surface with H 2 S using density functional theory calculations and demonstrated that the Eley−Rideal mechanism is the most suitable reaction process. Liu et al 25 investigated the role of H 2 S on the simultaneous reaction of Hg 0 + H 2 S + Fe 2 O 3 from an experimental perspective and deduced the foundational mercury adsorptive products through the element valence changes before and after the reaction but failed to give the specific reaction process. Wu et al 20…”

Section: Introductionmentioning

confidence: 99%

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Experimental Study on the Mercury Removal of a H₂S-Modified Fe₂O₃ Adsorbent

Duan

Meng

et al. 2021

Ind. Eng. Chem. Res.

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Owing to the massive mercury emission from coalfired power plants and other nonpower industries worldwide, it is imperative to develop non-carbon-based adsorbents for mercury removal. In this work, an efficient sulfur-loaded Fe 2 O 3 adsorbent for mercury removal was developed by H 2 S modification. The optimum modification parameters were determined at the vulcanization temperature of 200 °C and the vulcanization time of 2 h. The effect of reaction temperature and initial mercury concentration on mercury removal was investigated. Through the fixed-bed experiment, it was found that the adsorbent exhibits good mercury removal performance. The mechanism of mercury adsorption was deeply studied based on the characterization analyses of Brunauer−Emmett−Teller (BET), scanning electron microscopy (SEM), X-ray diffraction (XRD), thermogravimetry (TG), and X-ray photoelectron spectroscopy (XPS). The results show that the abundant and well-dispersed active sulfur sites on the surface of samples could enhance the chemical bonding to Hg 0 . The interaction between gaseous H 2 S and Fe 2 O 3 could lead to the formation of active S ad and FeS x (FeS, FeS 2 ) during the modification process. Those active sulfur species can further boost the adsorption and oxidation of Hg 0 to HgS during the mercury adsorption process.

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Section: Effect Of Initial Mercury Concentrationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Experimental Study on the Mercury Removal of a H₂S-Modified Fe₂O₃ Adsorbent

Duan

Meng

et al. 2021

Ind. Eng. Chem. Res.

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“…However, when a high concentration of HCl was added, the generated active chlorine species might be covered by HCl, which was detrimental to the capture of Hg 0 . Liu et al 44 studied the effect of H 2 S on Hg 0 capture over the γ-Fe 2 O 3 adsorbent and found that H 2 S promoted the removal of Hg 0 . The authors suggested that some active sulfur species would be formed by the reaction of H 2 S and γ-Fe 2 O 3 , which was conducive to the Hg 0 capture.…”

Section: Effects Of Nomentioning

confidence: 99%

Review on Magnetic Adsorbents for Removal of Elemental Mercury from Flue Gas

2020

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Mercury in flue gas has been identified to be one of the most harmful environmental pollutants to humans and other organisms as a result of its bioaccumulation, volatility, persistence, high toxicity, etc. Although many adsorption removal technologies have been developed to control mercury emissions, they are difficult to be used in practical industrial applications as a result of their own technology and cost constraints. Thus, more efficient and low-cost mercury pollution control technologies need to be further developed. Because of its good adsorption performance, easy separation and recovery, low toxicity, and high chemical stability, magnetic adsorbents are considered as one of the most promising adsorbents for controlling mercury emissions in flue gas. This review mainly analyzes the latest developments and research progress in the removal of Hg 0 in flue gas by magnetic adsorbents, especially magnetic iron-based adsorbents, magnetic carbon-based adsorbents, magnetic fly-ash-based adsorbents, and magnetic mineral-based adsorbents. The Hg 0 removal performance, mechanism, and kinetics of magnetic adsorbents are reviewed. The effects of flue gas compositions (such as O 2 , NO, SO 2 , CO 2 , H 2 O, etc.) on Hg 0 capture performance are summarized. The merits and drawbacks of magnetic adsorbents for capturing Hg 0 and the future development directions are also discussed. In comparison to other adsorbents, magnetic adsorbents can be easily separated from fly ash as a result of their better magnetization characteristics. It was found that the MoSe x (inter)Fe 3 O 4 adsorbent showed good Hg 0 removal performance, and the capacity of Hg 0 removal was up to 135 mg/g. In addition, considering the entire life cycle, magnetic adsorbents are more attractive in costs than other common adsorbents. The development and design of the magnetic adsorbents, which possess high adsorption efficiency, simple and efficient separability, green sustainability, good regeneration ability, and low production cost, are considered to be one of the research hotspots in the future. The purpose of this work is to provide theoretical guidance for the further development of magnetic adsorbents in the field of mercury control.

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“…There were reports on experimental results that indicated similar roles of α-Fe 2 O 3 and γ-Fe 2 O 3 in removal of elemental mercury (Liu et al 2015). In order to examine and compare their sorption properties, ferrous oxalate was decomposed at 170°C during 20 minutes.…”

Section: F Ormation Of Maghemite γ-Fe 2 O 3 Particlesmentioning

confidence: 99%

Synthetic Sorbent Materials Based on Metal Sulphides and Oxides

Софронов¹,

Беликов²,

Rucki³

et al. 2020

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The Open Access version of this book, available at www.taylorfrancis.com, has been made available under a Creative Commons Attribution-Non Commercial-No Derivatives 4.0 license.With the exception of the Introduction, Chapter 1.1, Final Remarks, and References no part of this book may be reprinted or reproduced or utilised in any form or by any electronic, mechanical, or other means, now known or hereafter invented, including photocopying and recording, or in any information storage or retrieval system, without permission in writing from the publishers.The Introduction, Chapter 1.1, Final Remarks, and References of this book are available for free in PDF format as Open Access from the individual product page at www.routledge.com. It has been made available under a Creative Commons Attribution-Non Commercial-No Derivatives 4.0 license.

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Study of Hg0 removal characteristics on Fe2O3 with H2S

Cited by 33 publications

References 33 publications

Experimental Study on the Mercury Removal of a H₂S-Modified Fe₂O₃ Adsorbent

Experimental Study on the Mercury Removal of a H₂S-Modified Fe₂O₃ Adsorbent

Review on Magnetic Adsorbents for Removal of Elemental Mercury from Flue Gas

Synthetic Sorbent Materials Based on Metal Sulphides and Oxides

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Study of Hg0 removal characteristics on Fe2O3 with H2S

Cited by 33 publications

References 33 publications

Experimental Study on the Mercury Removal of a H2S-Modified Fe2O3 Adsorbent

Experimental Study on the Mercury Removal of a H2S-Modified Fe2O3 Adsorbent

Review on Magnetic Adsorbents for Removal of Elemental Mercury from Flue Gas

Synthetic Sorbent Materials Based on Metal Sulphides and Oxides

Contact Info

Product

Resources

About

Experimental Study on the Mercury Removal of a H₂S-Modified Fe₂O₃ Adsorbent

Experimental Study on the Mercury Removal of a H₂S-Modified Fe₂O₃ Adsorbent