title: Gaseous elemental mercury capture from flue gas using magnetic nanosized (Fe3-xMnx)1-δO4.
abstract: A series of nanosized (Fe3-xMnx)1-δO4 (x = 0, 0.2, 0.5, and 0.8) were synthesized for elemental mercury capture from the flue gas. Cation vacancies on (Fe3-xMnx)1-δO4 can provide the active sites for elemental mercury adsorption, and Mn(4+) cations on (Fe3-xMnx)1-δO4 may be the oxidizing agents for elemental mercury oxidization. With the increase of Mn content in the spinel structure, the percents of Mn(4+) cations and cation vacancies on the surface increased. As a result, elemental mercury capture by (Fe3-xMnx)1-δO4 was obviously promoted with the increase of Mn content. (Fe2.2Mn0.8)1-δO4 showed an excellent capacity for elemental mercury capture (>1.5 mg g(-1) at 100-300 °C) in the presence of SO2 and HCl. Furthermore, (Fe2.2Mn0.8)1-δO4 with the saturation magnetization of 45.6 emu g(-1) can be separated from the fly ash using magnetic separation, leaving the fly ash essentially free of sorbent and adsorbed Hg. Therefore, nanosized (Fe2.2Mn0.8)1-δO4 may be a promising sorbent for the control of elemental mercury emission.
authors.affiliation: School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240 PR China.
authors.forename: Shijian
authors.initials: S
authors.lastname: Yang
authors.forename: Naiqiang
authors.initials: N
authors.lastname: Yan
authors.forename: Yongfu
authors.initials: Y
authors.lastname: Guo
authors.forename: Daqing
authors.initials: D
authors.lastname: Wu
authors.forename: Hongping
authors.initials: H
authors.lastname: He
authors.forename: Zan
authors.initials: Z
authors.lastname: Qu
authors.forename: Jianfeng
authors.initials: J
authors.lastname: Li
authors.forename: Qin
authors.initials: Q
authors.lastname: Zhou
authors.forename: Jingping
authors.initials: J
authors.lastname: Jia
mesh_terms: D000327:Adsorption; D000397:Air Pollution / Q000517:prevention & control; D060729:Coal Ash; D005740:Gases / Q000737:chemistry; D008280:Magnetics; D008628:Mercury / Q000737:chemistry*; D053758:Nanoparticles; D010084:Oxidation-Reduction
chemical_list: D060729:Coal Ash; D005740:Gases; D008628:Mercury