催化学报

催化学报 ›› 2008, Vol. 29 ›› Issue (1): 81-85.

• 研究论文 • 上一篇    下一篇

SO2影响V2O5/AC催化剂脱硝活性的机理

肖勇1,2,刘振宇1,3,刘清雅3,王建成1,2,邢新艳1,2,黄张根1,2   

  1. 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, 山西太原 030001; 2 中国科学院研究生院, 北京 100049; 3 北京化工大学化工资源有效利用国家重点实验室, 北京 100029
  • 收稿日期:2008-01-25 出版日期:2008-01-25 发布日期:2011-12-25

Mechanism of SO2 Influence on NO Removal over V2O5/AC Catalyst

XIAO Yong1,2, LIU Zhenyu1,3*, LIU Qingya3, WANG Jiancheng1,2, XING Xinyan1,2, HUANG Zhanggen1,2   

  1. 1 State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, The Chinese Academy of Sciences, Taiyuan 030001, Shanxi, China; 2 Graduate University of Chinese Academy of Sciences, Beijing 100049, China; 3 State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China
  • Received:2008-01-25 Online:2008-01-25 Published:2011-12-25

PDF

791

被引次数

53

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<1 nm)有利于SO3的迁移和储存,从而有利于脱硝.

关键词: 氧, 二氧化硫, 氧化钒, 活性焦, 负载型催化剂, 氮氧化物

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