SO2影响V2O5／AC催化剂脱硝活性的机理  

Mechanism of SO_2 Influence on NO Removal over V_2O_5/AC Catalyst

作　　者：肖勇[1] 刘振宇[1] 刘清雅[2] 王建成[1] 邢新艳[1] 黄张根[1] 

机构地区：[1]中国科学院山西煤炭化学研究所煤转化国家重点实验室 [2]北京化工大学化工资源有效利用国家重点实验室,北京100029

出　　处：《催化学报》2008年第1期81-85,共5页

基　　金：国家自然科学基金(90210034,20503038)

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.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.

关 键 词：氧 二氧化硫 氧化钒 活性焦 负载型催化剂 氮氧化物 

分 类 号：O643.3[理学—物理化学]