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An Experimental Study on Oxidized Mercury Adsorption by Bromide Blended Coal Combustion Fly Ash

Mingyu Yu1, Mengyuan Liu1, Guangqian Luo1,2,*, Ruize Sun1, Jingyuan Hu1, Hailu Zhu1, Li Zhong3, Lipeng Han3, Xian Li1, Hong Yao1

1 State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China
2 Shenzhen Huazhong University of Science and Technology Research Institute, Shenzhen, 518000, China
3 Huaneng Clean Energy Technology Research Institute, Beijing, 102209, China

* Corresponding Author: Guangqian Luo. Email: email

Energy Engineering 2021, 118(5), 1277-1286. https://doi.org/10.32604/EE.2021.014810

Abstract

The application of forced mercury oxidation technology would lead to an increase of Hg2+ concentration in the flue gas. Although Hg2+ can be easily removed in the WFGD, the mercury re-emission in the WFGD can decrease the total removal of mercury from coal-fired power plants. Hence, it is necessary to control Hg2+ concentration in the devices before the WFGD. Fly ash adsorbent is considered as a potential alternative for commercial activated carbon adsorbent. However, the adsorption efficiency of the original fly ash is low. Modification procedure is needed to enhance the adsorption performance. In this study, the adsorption of Hg2+ by brominated fly ash was studied. The fly ash was collected from the full-scale power plant utilizing bromide-blended coal combustion technology. The brominated fly ash exhibited excellent performance for Hg2+ removal. The flue gas component HBr and SO2 could improve adsorbent’s performance, while HCl would hinder its adsorption process. Also, it was demonstrated by Hg-TPD experiments that the adsorbed Hg2+ mainly existed on the fly ash surface in the form of HgBr2. In summary, the brominated fly ash has a broad application prospect for mercury control.

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APA Style
Yu, M., Liu, M., Luo, G., Sun, R., Hu, J. et al. (2021). An experimental study on oxidized mercury adsorption by bromide blended coal combustion fly ash. Energy Engineering, 118(5), 1277-1286. https://doi.org/10.32604/EE.2021.014810
Vancouver Style
Yu M, Liu M, Luo G, Sun R, Hu J, Zhu H, et al. An experimental study on oxidized mercury adsorption by bromide blended coal combustion fly ash. Energ Eng. 2021;118(5):1277-1286 https://doi.org/10.32604/EE.2021.014810
IEEE Style
M. Yu et al., "An Experimental Study on Oxidized Mercury Adsorption by Bromide Blended Coal Combustion Fly Ash," Energ. Eng., vol. 118, no. 5, pp. 1277-1286. 2021. https://doi.org/10.32604/EE.2021.014810



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