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

+ R' K0 M$ l. x: X, n- [吴祖良,高翔,骆仲泱,倪明江,岑可法
6 X: c$ y8 A4 n; }(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)
' ^! O' M6 `  x# X" Y1 w6 ^
! ]/ I' o: ?) |8 ^7 A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
2 O+ x! D4 u& X  e) u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。
, d- J6 t' u& n: i" K) M# W; a$ w9 B6 U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
8 i3 I, i$ T! g+ }$ Q' R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。
关键词：电晕；自由基簇射；电催化氧化；脱硫；脱硝
2 T6 F# [( v0 j. s8 s5 Z中图分类号：TQ534.9；X701.7文献标识码：A
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) z& h& g0 p  m' xReactive Characteristics and Mechanism of the SO2 and NOx Simultaneous Removal
Process Using a Radical Shower Electro-Catalytic Oxidation System
& ]! R2 c2 i0 S7 kWU Zu-liang,GAO Xiang,LUO Zhong-yang,NI Ming-jiang,CEN Ke-fa
  n+ D( E( h2 n0 _- {* w1 W(State Key Laboratory of Clean Energy Utilization,Zhejiang University,Hangzhou 310027,China)
4 R% k4 Y! z$ z( A5 c+ wAbstract: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
! z3 V4 x9 @( e4 d/ @" K0 I8 G  A2 Jpollutants on the removal effect were studied especially.The results show that with 0.042 L·min
?1
' n' h% h* T# s" e. r5 H' yNH3,50%
SO2 can be removed without using discharge,however,using corona discharge can further improve SO2
removal to a certain extent.Without discharge,the removal of NOx can nearly be ignored and its removal
1 X3 v3 w: n4 x* x0 [" |depends on the corona discharge process.With appropriate SO2 content,the NOx removal can be improved and
& s1 m# l9 D% `# C& jits 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
( E$ `4 f+ z2 G8 l7 p) q5 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.
1 a/ ~5 I( b* ]* zKey words:corona;radical shower;electro-catalytic oxidation;desulfurization;denitrification