Thermal Stability and Adsorption of Mercury Compounds in Fly Ash
Jun Zhong1, Fangyong Li1, Junhui Fan2, *
1 Electric Power Science Research Institute of Guangdong Power Grid Co. Ltd., Guangzhou, China
2 School of Energy and Power Engineering, North China Electric Power University, Baoding, China
Abstract
Fly ashes were collected from five power plants under two loads in China. The ashes were heated at four different temperatures, and mercury speciation was determined based on the release regular pattern of mercury with temperature. The mercury concentration, unburned carbon content and mean ash particle sizes were measured. The correlation of mercury capture and unburned carbon content, mean ash particle sizes were analyzed. Results indicate that the amount of unburned carbon and mercury adsorb is significantly positively correlated in fly ash; the smaller the mean ash particle size, the more mercury particles are captured. There was little HgO and HgSO4, and the main form of mercury compounds in fly ash were HgCl2 and HgS. The high element Cl content can result in high HgCl2 ratio in particular mercury and element S play an important role in adsorbing mercury.
Keywords: Adsorption of mercury, Fly ash, Mercury species, Thermal stability.
Article Information
Article History:
Received Date: 01/06/2016
Revision Received Date: 19/08/2016
Acceptance Date: 22/10/2016
Electronic publication date: 07/12/2016
Collection year: 2016
© Zhong et al.; Licensee Bentham Open
open-access license: This is an open access article licensed under the terms of the Creative Commons Attribution-Non-Commercial 4.0 International Public License (CC BY-NC 4.0) (
https://creativecommons.org/licenses/by-nc/4.0/legalcode), which permits unrestricted, non-commercial use, distribution and reproduction in any medium, provided the work is properly cited.
* Address correspondence to this author at the School of Energy and Power Engineering, North China Electric Power University, Baoding, China; Tel: +8613811101294; E-mails: 394890445@qq.com, bianzhugeng04@163.com
Open Peer Review Details |
Manuscript submitted on 01-06-2016 |
Original Manuscript |
Thermal Stability and Adsorption of Mercury Compounds in Fly Ash |