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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

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【作者】 肖勇刘振宇刘清雅王建成邢新艳黄张根

【Author】 XIAO Yong1,2, LIU Zhenyu1,3, LIU Qingya3, WANG Jiancheng1,2, XING Xinyan1,2, HUANG Zhanggen1,2(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)

【机构】 中国科学院山西煤炭化学研究所煤转化国家重点实验室北京化工大学化工资源有效利用国家重点实验室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中国科学院研究生院北京100049山西太原030001北京化工大学化工资源有效利用国家重点实验室北京100029山西太原030001中国科学院研究生院

【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.

【基金】 国家自然科学基金(90210034,20503038)
  • 【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
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