标题: Removal of elemental mercury from flue gas using the magnetic Fe-containing carbon prepared from the sludge flocculated with ferrous sulfate
作者: Wang, Y (Wang, Yuan); Li, HH (Li, Honghu); He, Z (He, Zhong); Zhang, M (Zhang, Meng); Guan, JM (Guan, Jianmin); Qian, KK (Qian, Kaikai); Xu, JJ (Xu, Jingjie); Hu, JJ (Hu, Jiangjun)
来源出版物: ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH DOI: 10.1007/s11356-020-08133-4 提前访问日期: MAY 2020
摘要: The sewage sludge flocculated with ferrous sulfate (SFS) was prepared by one-step pyrolysis to obtain magnetic Fe-containing carbon. Results showed that only a small amount of FexOy as well as extremely weak magnetism were observed at pyrolysis temperatures of less than 500 degrees C. SFS tended to exhibit intensive agglomeration, leading to the drastic increase of the crystalline-phase particle size at high pyrolysis temperature. The optimal pyrolysis temperature is 700 degrees C, corresponding to the production of some sulfides, an optimal content of FexOy, and a suitable BET surface. Hg-0 removal efficiency of SFS700 (SFS pyrolyzed at 700 degrees C) reached 80.7% at the reaction temperature of 125 degrees C. The presence of O-2 and low concentration of SO2 enhanced the Hg-0 removal, while the H2O vapor and high SO2 concentration inhibited it. Meanwhile, good resistance for the adsorbent to moderate concentrations of SO2 and H2O was observed. Moreover, the good magnetism performance is conducive to the recovery and utilization of the SFS700 in flue gas. Therefore, SFS can be used for Hg-0 removal without any chemical modification after undergoing one-step pyrolysis and this study has guiding significance for the resource utilization and engineering practices.
文献类型: Article; Early Access
作者关键词: Hg-0 removal; Pyrolysis temperature; Sewage sludge; Coal-fired flue gas
地址: [Wang, Yuan; He, Zhong; Zhang, Meng; Guan, Jianmin; Qian, Kaikai; Xu, Jingjie; Hu, Jiangjun] Wuhan Univ, Sch Resource & Environm Sci, Wuhan 430079, Hubei, Peoples R China.
[Li, Honghu] Zhongnan Univ Econ & Law, Sch Informat & Safety Engn, Wuhan 430073, Hubei, Peoples R China.
通讯作者地址: Hu, JJ (通讯作者)，Wuhan Univ, Sch Resource & Environm Sci, Wuhan 430079, Hubei, Peoples R China.
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