摘要
将V2O5担载在活性炭纤维(ACF)上制得V2O5/ACF催化剂,并采用暂态响应实验和NH3吸附氧化实验等考察了影响V2O5/ACF催化剂上选择性催化还原(SCR)反应的关键因素.结果表明,NH3在催化剂表面的吸附是必要的,而且该吸附是一个快速过程;气相O2的存在有利于形成催化剂中所需的活性氧化态物种.NH3吸附-脱附与原位质谱相结合的实验表明,V2O5/ACF催化剂具有吸附NH3和将NH3氧化为N2H2的能力,N2H2为NH3氧化的一种中间体.
A novel V2O5/activated carbon fiber （ACF） catalyst for NO removal was prepared. The mechanism of selective catalytic reduction of NO was carried out by a transient response experiment and NH3 adsorption and oxidation. The results show that NH3 adsorption is necessary and is a fast process. The active sites can be easily formed in the presence of 02. Adsorption and temperature-programmed desorption with online mass spectroscopy analysis were used to study the adsorption and oxidation behavior of NH3 at 120℃ over the V2O2/ACF catalyst. The adsorbed NH3 can be oxidized to N2H2 on the catalyst surface, and N2H2 is an intermediate of oxidized NH3.
出处
《催化学报》
SCIE
CAS
CSCD
北大核心
2009年第10期1007-1011,共5页
基金
国家自然科学基金(20877078)
煤转化国家重点实验室开放基金(08-309)
山西省自然科学基金(2009011011-1)
关键词
五氧化二钒
活性炭纤维
选择性催化还原
氨
吸附
活化
机理
vanadium oxide
activated carbon fiber
selective catalytic reduction
ammonia
adsorption
activation
mechanism
