Simultaneous Removal of SO2 and NO Using H2O2/Urea Activated by Vacuum Ultraviolet Light in a Pilot-Scale Spraying Tower

被引：18
作者：
Xie, Wenxia [1 ]
Xu, Chengwei [1 ]
Zhang, Jun [1 ]
Liu, Yangxian [2 ]
Xi, Jianfei [3 ]
Lv, Jianhong [1 ]
Gu, Zhongzhu [3 ]
机构：
[1] Southeast Univ, Sch Energy & Environm, Key Lab Energy Thermal Convers & Control, Minist Educ, Nanjing 210096, Jiangsu, Peoples R China
[2] Jiangsu Univ, Sch Energy & Power Engn, Zhenjiang 212013, Jiangsu, Peoples R China
[3] Nanjing Normal Univ, Sch Energy & Mech Engn, Nanjing 210042, Jiangsu, Peoples R China
来源：
ENERGY & FUELS | 2019年 / 33卷 / 02期
基金：
中国国家自然科学基金;
关键词：
FIRED FLUE-GAS; NITRIC-OXIDE; PHOTOCHEMICAL REMOVAL; SULFUR-DIOXIDE; WET REMOVAL; SIMULTANEOUS ABSORPTION; INTEGRATIVE PROCESS; EXCIMER LAMP; OXIDATION; UV/H2O2;
D O I：
10.1021/acs.energyfuels.8b03154
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 study on simultaneous removal of SO2 and NO from flue gas using H2O2/urea activated by vacuum ultraviolet (VUV) light was carried out in a pilot-scale photochemical spraying tower. The effects of different operational variables on simultaneous removal efficiencies of SO2 and NO were investigated. The gaseous and liquid removal products were detected by the flue gas analyzer and ion chromatography (IC), respectively. The removal pathways of SO2 and NO were analyzed. The application prospect of this new method was also preliminarily discussed. Results show that under most of the process conditions tested, SO2 can attain complete removal. Removal efficiency of NO is enhanced under increasing the VUV irradiation intensity and H2O2 concentration, but it is inhibited by an increase of the flue gas flow and NO concentration. The urea concentration and liquid-gas ratio have a dual influence on NO removal, and its removal efficiency increases first and then decreases. SO2 concentration has little impact on NO removal. IC results show that SO42- and NO3- are the main removal products in solution. (OH)-O-center dot derived from VUV activation of H2O2 plays the crucial role in NO removal.
引用
收藏
页码：1325 / 1333
页数：9
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