EFFECT OF SO2 ON ACTIVATED CARBON FIBER-SUPPORTED VANADIUM OXIDE CATALYSTS FOR NO REDUCTION WITH AMMONIA AT LOW TEMPERATURE
IntroductionNitrogen oxides (NOx) in flue gas are major air pollutants which must be removed before emitting. Selective catalytic reduction (SCR) of NO with NH3 has been proven to be the most effective technology in the removal of NOX from flue gases 1. The commercial catalyst, V2O5/TiO2, must be operated at temperature higher than 350℃ to avoid catalyst deactivaiion by SO2. So the low temperature SCR process is preferable because of low energy consumption and to be economical for retrofitting into an existing system for flue gas cleaning. But the shortcoming of the low temperature SCR reaction is that the catalysts are easily deactivated when SO2 is coexist in the flue gas. Most of the low temperature SCR catalysts reported in the literatures, such as Fe2OVAC and MnOx/Al2O3, are prone to deactivation by SO22-3. So the key to the low temperature SCR process is to develop a catalyst which can resist SO2 poisoning.Activated carbon fibers (ACFs) have increasingly received attention in the past few years due to their some characteristics for catalyst and catalyst supports, such as microporous structure, relatively larger specific surface area and a variety of surface functional groups4. Considering these facts, ACF may serve as a good support for the vanadium catalyst. So in this work, V2O5/ACF is explored and shows an excellent catalytic activity for Nox removal from flue gases. Considering of SO2 in the fuel gas simultaneously, the aim of this work is to study the effect of SO2 on SCR activity of the V2O5/ACF catalyst.
Yaqin Hou Zhanggen Huang
State Key Laboratory of Coal Conversion Institute of Coal Chemistry Chinese Academy of Sciences Taiyuan, 030001, China
国际会议
The 7th China-Korea Workshop on Clean Energy Technology(第七届中韩清洁能源技术研讨会)
太原
英文
137-138
2008-06-25（万方平台首次上网日期，不代表论文的发表时间）