Simultaneous removal of NOx and SO2 from flue gas using combined Na2SO3 assisted electrochemical reduction and direct electrochemical reduction

被引：45
|
作者：
Guo, Qingbin [1 ]
He, Yi [2 ,3 ]
Sun, Tonghua [1 ]
Wang, Yalin [1 ]
Jia, Jinping [1 ]
机构：
[1] Shanghai Jiao Tong Univ, Sch Environm Sci & Engn, Shanghai 200240, Peoples R China
[2] CUNY, John Jay Coll, Dept Sci, New York, NY 10019 USA
[3] CUNY, Grad Ctr, New York, NY 10019 USA
来源：
JOURNAL OF HAZARDOUS MATERIALS | 2014年 / 276卷
关键词：
Flue gas; Desulfurization; Denitrification; Electrochemical reduction; Sulfate recovery; FE-II-EDTA; AQUEOUS-SOLUTIONS; NITRIC-OXIDE; FLY-ASH; ABSORPTION; DESULFURIZATION; CRYSTALLIZERS; OXIDATION; NITROGEN; ION;
D O I：
10.1016/j.jhazmat.2014.05.058
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
A method combining Na2SO3 assisted electrochemical reduction and direct electrochemical using Fe(II)(EDTA) solution was proposed to simultaneously remove NOx and SO2 from flue gas. Activated carbon was used as catalyst to accelerate the process. This new system features (a) direct conversion of NOx and SO2 to harmless N-2 and SO42- (b) fast regeneration of Fe(II)(EDTA); (c) minimum use of chemical reagents; and (d) recovery of the reduction by-product (Na2SO4). Fe(II)(EDTA) solution was continuously recycled and reused during entire process, and no harmful waste was generated. Approximately 99% NOx and 98% SO2 were removed under the optimal condition. The stability test showed that the system operation was reliable. (C) 2014 Elsevier B.V. All rights reserved.
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页码：371 / 376
页数：6
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