The role of C2H4 in plasma-assisted NOx reduction over Ag/Al2O3 catalyst

ZHU Xiangyu; SUN Baomin; XIAO Haiping; WANG Dong; WANG Tao; ZHANG Tingting

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The role of C₂H₄ in plasma-assisted NO_x reduction over Ag/Al₂O₃ catalyst

Thermal Power Generation Vol. 43, Issue 7, Pages: 115-118(2014)

更新时间：2025-09-28

- The role of C₂H₄ in plasma-assisted NO_x reduction over Ag/Al₂O₃ catalyst
- 作者机构：
  
  华北电力大学电站设备状态监测与控制教育部重点实验室
- 作者简介：
- 基金信息：
- DOI：
  CLC： X701
- Published：2014
- 稿件说明：
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ZHU Xiangyu, SUN Baomin, XIAO Haiping, et al. The role of C₂H₄ in plasma-assisted NO_x reduction over Ag/Al₂O₃ catalyst[J]. Thermal Power Generation, 2014, 43(7): 115-118.
DOI：

ZHU Xiangyu, SUN Baomin, XIAO Haiping, et al. The role of C₂H₄ in plasma-assisted NO_x reduction over Ag/Al₂O₃ catalyst[J]. Thermal Power Generation, 2014, 43(7): 115-118. DOI：

摘要

在模拟实验系统上

利用介质阻挡放电(DBD)结合Ag/Al2O3催化剂进行烟气脱硝实验

分析了C2H4对脱除NOx的影响及脱除机理。结果表明:同样情况下

添加C2H4后

NO脱除率明显升高

并且随着C2H4浓度的升高而增加;同时

加载催化剂比未加载催化剂的NO脱除率高。在能量输入密度300J/L、C2H4体积分数1%时

DBD协同Ag/Al2O3催化

NO脱除率达61.3%。分析认为:在DBD发生器中

C2H4与O2反应生成CH3O2·、HO2等强氧化性基团

将NO氧化成NO2;在催化装置中

C2H4与O2在Ag/Al2O3表面发生反应

产生更多的CH2=CH-O·和CH3COO·等自由基

最终使NOx脱除率升高。

Abstract

An experimental simulation system was built for removal of NOx from flue gas using combined method of dielectric barrier discharge(DBD)and Ag/Al2O3 catalyst.The effect of ethylene addition on NOx reduction was investigated in detail.The results show that NO removal rate increased significantly with the addition of C2H4;as the C2H4 concentration increased

the effects were enhanced.Compared to the system without catalyst

NO removal rate increased by a certain degree with catalyst.When the energy density was 300J/L and the volume fraction of ethylene was 1%

NO removal rate would reach 61.3% by DBD-Ag/Al2O3.The mechanism analysis indicates that

strong oxidizing radicals produced in DBD generator

like CH3O2·

HO2

etc.

and CH2=CH-O·

CH3COO·

etc.produced in catalytic reactor through the reaction of C2H4 with O2

played a key role in NOx removal.

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