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SO2影响V2O5/AC催化剂脱硝活性的机理
Mechanism of SO2 Influence on NO Removal over V2O5/AC Catalyst
【摘要】 通过O2和SO2瞬态响应实验,研究了有水条件下SO2抑制V2O5/AC(活性焦)催化剂脱硝的原因.结果表明,SO2与V2O5反应生成VOSO4,导致V2O5/AC催化剂的脱硝活性下降.VOSO4的量动态变化,既与气氛中SO2的浓度有关,也与催化剂已实现的脱硫量(或硫含量)有关.催化剂的微孔(d<1nm)有利于SO3的迁移和储存,从而有利于脱硝.
【Abstract】 O2 and SO2 transient response experiments were carried out to study the influence of SO2 on NO removal over the V2O5/AC (activated coke) catalyst in the presence of H2O. VOSO4 formed in the reaction of SO2 with V2O5 resulted in the decrease in NO removal activity of the V2O5/AC catalyst. The amount of VOSO4 in the catalyst was affected by both SO2 concentration and the amount of SO2 that was captured. Micropores of the V2O5/AC catalyst were favorable for the migration and deposition of SO3 and therefore benefited the NO removal over the catalyst.
【Key words】 oxygen; sulfur dioxide; vanadium oxide; activated coke; supported catalyst; nitrogen oxide;
- 【文献出处】 催化学报 ,Chinese Journal of Catalysis , 编辑部邮箱 ,2008年01期
- 【分类号】O643.3
- 【被引频次】35
- 【下载频次】757