Simultaneous Removal of SO2 and NOx from Coal-Fired Flue Gas Using Steel Slag Slurry

被引：47
|
作者：
Meng, Ziheng [1 ,2 ]
Wang, Chenye [1 ]
Wang, Xingrui [1 ]
Chen, Yan [1 ]
Li, Huiquan [1 ,2 ]
机构：
[1] Chinese Acad Sci, Key Lab Green Proc & Engn, Natl Engn Lab Hydrometallurg Cleaner Prod Technol, Inst Proc Engn, Beijing 100190, Peoples R China
[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
来源：
ENERGY & FUELS | 2018年 / 32卷 / 02期
基金：
中国国家自然科学基金;
关键词：
SIMULTANEOUS ABSORPTION; COKE-OVEN; INTEGRATIVE PROCESS; NITROGEN-DIOXIDE; OZONE OXIDATION; FINE PARTICLES; NITRIC-OXIDE; DESULFURIZATION; INJECTION; PREOXIDATION;
D O I：
10.1021/acs.energyfuels.7b03385
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
A method for simultaneously removing sulfur dioxide (SO2) and nitrogen oxides (NOx) from coke oven flue gas using steel slag slurry was proposed. Due to the high removal efficiency of SO2, the effects of operation conditions on the removal of NOx were investigated emphatically. The results showed that the removal efficiency of NOx increased with an increase in steel slag slurry concentration, NOx oxidation ratio, steel slag slurry pH, and NOx and SO2 inlet concentrations and a decrease in reaction temperature. The removal efficiencies of SO2 and NOx could reach 100 and 83.4%, respectively, by optimizing the operation conditions. The mechanism of NOx removal using steel slag slurry was investigated. The results showed that (MgO)(0.841).(MnO)(0.159) (RO phase, a CaO-FeO-MnO-MgO solid solution) in steel slag was decomposed by H+ and produced Mg2+ and Mn2+. Furthermore, Mn2+ in steel slag slurry could promote the absorption of NO2 via redox reactions with the generation of solid Mn3O4 and MnO(OH).
引用
收藏
页码：2028 / 2036
页数：9
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