Effect of KCl on selective catalytic reduction of NO with NH3 over aV2O5/AC catalyst

被引：24
|
作者：
Zhang, Xianlong [2 ,3 ]
Huang, Zhanggen [3 ]
Liu, Zhenyu [1 ,3 ]
机构：
[1] Beijing Univ Chem Technol, State Key Lab Chem Resource Engn, Beijing 100029, Peoples R China
[2] Chinese Acad Sci, Grad Univ, Beijing 100039, Peoples R China
[3] Chinese Acad Sci, Inst Coal Chem, State Key Lab Coal Convers, Taiyuan 030001, Peoples R China
来源：
CATALYSIS COMMUNICATIONS | 2008年 / 9卷 / 05期
基金：
中国国家自然科学基金;
关键词：
V2O5/AC catalyst; low temperature SCR; deactivation; KCl;
D O I：
10.1016/j.catcom.2007.09.008
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Deactivation of a low temperature selective catalytic reduction (SCR) catalyst, 1 Wt% V2O5/AC, by potassium chloride (KCl) is studied using BET and pore size distribution measurements, NH3 sorption and temperature-programmed desorption (TPD), temperature-programmed surface reaction (TPSR). Results show that KCl deactivates 1 Wt%V2O5/AC's SCR activity and the deactivation become severer at higher KCl loadings. The deactivation is not caused by pore plugging but by neutralization of acid sites on V2O5/AC. Weak acid sites are responsible for NH3 activation and SCR of NO, and are preferentially deactivated by KCl. (c) 2007 Elsevier B.V. All rights reserved.
引用
收藏
页码：842 / 846
页数：5
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