东南大学学报（自然科学版）2016，Vol.46Issue(2)：297-303,7.DOI:10.3969/j.issn.1001-0505.2016.02.012
低温等离子体强化燃煤烟气 Hg0氧化的气氛影响及特性分析
Influence of gas composition and characteristic analysis on oxidation of Hg0 in coal-fired flue gas by non-thermal plasma
摘要
Abstract
To study the effect of coal-fired flue gas composition on the oxidation of Hg0 by using non-thermal plasma, the quartz glass tube and the stainless steel rode were used as the barrier medi-um and the high voltage discharge electrode, respectively, and the Hg0 in simulated flue gas was ox-idized by alternative current high voltage discharge non-thermal plasma.The effects of input energy and gas composition on the mercury speciation transformation and the simultaneous desulfurization and denitration in simulated flue gas were investigated.The results show that the oxidation efficiency of Hg0 increases with the increase of the input energy in the initial stage.The reason is that the con-tents of free radical O increases by O2 decomposition, but N2 in simulated flue gas decomposes when the input energy is large enough, which consumes free radical O and produces NO, leading to the decrease of elemental mercury oxidation efficiency.The content of free radical O increases with the increase of the contents of O2 and CO2 in simulated flue gas, which can promote Hg0 oxidation.NO and SO2 can be decomposed into N2 and S by non-thermal plasma, and free radical O which can oxi-dize Hg0 is simultaneously produced.Therefore, non-thermal plasma can promote NO and SO2 to re-act with Hg0 and realize desulfurization and denitration.关键词
低温等离子体/燃煤烟气/汞氧化/氧自由基Key words
non-thermal plasma/coal-fired flue gas/mercury oxidation/oxygen free radical分类
环境科学引用本文复制引用
张君,段钰锋,赵蔚欣,朱纯,周强,佘敏..低温等离子体强化燃煤烟气 Hg0氧化的气氛影响及特性分析[J].东南大学学报（自然科学版）,2016,46(2):297-303,7.基金项目
国家自然科学基金资助项目（51076030，51376046）、中央高校基本科研业务费专项资金资助项目、江苏省研究生科研创新计划资助项目（KYLX＿0184，CXZZ13＿0093，KYLX＿0115）． （）
