自由基簇射电催化氧化同时脱硫脱硝过程反应特性及机理研究KDH【期刊文献】

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自由基簇射电催化氧化同时脱硫脱硝过程反应特性及机理研究

吴祖良,高翔,骆仲泱,倪明江,岑可法
(浙江大学热能工程研究所,能源清洁利用国家重点实验室,浙江杭州310027)
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6 }; X! K# V( L; `: Z0 j) y摘要：应用一种新型的电催化氧化技术??电晕放电自由基簇射技术进行了烟气同时脱硫脱硝实验，重点分析了SO2
和NOx脱除的反应特性和相互影响机理。结果表明：在0.042 L?min?1的氨气注入下，50%的SO2在放电前被脱除，但
放电过程仍对SO2的脱除有一定的促进作用。而NOx的脱除取决于放电过程，放电前的脱除几乎可以忽略不计。在脱
除过程中，适量的SO2能够提高NOx的脱除，最大能使NOx脱除率提高25%，但过高的SO2又使NOx的脱除趋于减少。
不同SO2初始浓度下NOx脱除率的变化主要归因于SO2和NO2之间的反应。NO初始浓度的变化对SO2的脱除影响较
# o; [+ @5 l/ _: D+ u5 M小。烟气成分的变化对SO2和NOx的脱除影响也不明显。在脱硫脱硝过程中，观察到的白色晶体状物质主要成分是硫
酸铵和硝酸铵。
8 U* s0 X1 x" n; l) \关键词：电晕；自由基簇射；电催化氧化；脱硫；脱硝
中图分类号：TQ534.9；X701.7文献标识码：A
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1 g5 m1 h9 ~% y* EReactive Characteristics and Mechanism of the SO2 and NOx Simultaneous Removal
Process Using a Radical Shower Electro-Catalytic Oxidation System
5 W0 ~9 u! L  [WU Zu-liang,GAO Xiang,LUO Zhong-yang,NI Ming-jiang,CEN Ke-fa
; ]' D2 ^# `3 A- q% }1 M. O(State Key Laboratory of Clean Energy Utilization,Zhejiang University,Hangzhou 310027,China)
* J0 e" X# n% [5 N1 O+ KAbstract:Experiments of simultaneously removing SO2 and NOx by using corona discharge radical shower
technology were conducted.The reactive characteristics and the mechanism of the mutual influence between
7 l4 o+ I5 L# c- l0 G! K0 A8 C& Upollutants on the removal effect were studied especially.The results show that with 0.042 L·min
?1
NH3,50%
- I4 n- T4 K3 L2 pSO2 can be removed without using discharge,however,using corona discharge can further improve SO2
  n! u2 X- G) b8 p0 G% J3 Kremoval to a certain extent.Without discharge,the removal of NOx can nearly be ignored and its removal
$ p5 p( J; |+ P! u  P2 Jdepends on the corona discharge process.With appropriate SO2 content,the NOx removal can be improved and
' o2 w* y$ {. o3 H2 ?# rits maximum removal rate increase can reach 25%.However,overmuch SO2 content will restrain NOx removal.
The change of NOx removal rate with different SO2 initial concentrations is attributed to the reaction between
  P# m; l2 m4 C6 QSO2 and NO2.The NO initial concentration has little effect on SO2 removal,and the components of flue gas
have no significant effect on SO2 and NOx removal too.The X-ray diffraction analysis shows that the created
white crystal substances observed in the experiments are(NH4)2SO4 and NH4NO3.
, L% D; s( W" t6 Z' mKey words:corona;radical shower;electro-catalytic oxidation;desulfurization;denitrification