Study on the removal of oxidized mercury (Hg2+) from flue gas by thiol chelating resin

被引:24
|
作者
Fu, Kang-Li [1 ,2 ,3 ]
Yao, Ming-Yu [1 ]
Qin, Chuan-guang [2 ,3 ]
Cheng, Guang-Wen [1 ]
Li, Yang [1 ]
Cai, Ming [1 ]
Yang, Song [1 ]
Nie, Jian-Ping [1 ]
机构
[1] Xian Thermal Power Res Inst Ltd Co, Natl Energy R&D Ctr Clean & High Efficiency Fossi, Xian 710054, Peoples R China
[2] Northwestern Polytech Univ, Minist Educ, Key Lab Space Appl Phys & Chem, Xian 710129, Peoples R China
[3] Northwestern Polytech Univ, Key Lab Macromol Sci & Technol Shanxi Prov, Dept Appl Chem, Sch Nat & Appl Sci, Xian 710129, Peoples R China
基金
中国博士后科学基金;
关键词
Mercury; Flue gas; Chemisorptions; Desulfurization; Thiol chelating resin; Absorbent; HEAVY-METAL IONS; SELECTIVE CATALYTIC-REDUCTION; ELEMENTAL MERCURY; COAL COMBUSTION; PORE STRUCTURE; POWER-PLANTS; FGD GYPSUM; REEMISSION; OXIDATION; ADDITIVES;
D O I
10.1016/j.fuproc.2016.02.014
中图分类号
O69 [应用化学];
学科分类号
081704 ;
摘要
Thiol chelating resin was first introduced to remove oxidized mercury (Hg2+) from flue gas, and it could avoid the mercury re-emission brought about by the wet flue gas desulfurization process. Thiol chelating resin is prepared with chloromethyl polystyrene resin as material, and then thiol chelating resin was characterized by Fourier transform infrared spectroscopy, Brunauer-Emmett-Teller, elemental analysis, and thermogravimetric analysis. The Hg2+ adsorption performance of thiol chelating resin and its sorption behavior were also investigated in simulated flue gas containing Hg2+. It was found that thiol chelating resin possessed high thermal stability and specific surface area, and could be used as an adsorbent for Hg2+ removal from flue gas. The sorption behavior of Hg2+ from flue gas by thiol chelating resin conformed to pseudo second-order kinetics, and the chemisorption process was the rate-limiting step. The Hg2+ removal efficiency was above 90% for flue gas at 25-50 degrees C. Thiol chelating resin captured Hg2+ was regenerated successfully by 6 M hydrochloric acid. When thiol chelating resin has been regenerated three times, its regeneration rate still reached up to 90.2%. The reusability of thiol chelating resin made the Hg2+ removal process economically feasible. (C) 2016 Elsevier B.V. All rights reserved.
引用
收藏
页码:28 / 34
页数:7
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