Property influence and poisoning mechanism of HgCl2 on V2O5-WO3/TiO2 SCR-DeNOx catalysts

被引：15
|
作者：
Kong, Ming [1 ]
Liu, Qingcai [1 ]
Jiang, Lijun [1 ]
Guo, Fuqiang [1 ]
Ren, Shan [1 ]
Yao, Lu [1 ]
Yang, Jian [1 ]
机构：
[1] Chongqing Univ, Engn Res Ctr Energy & Environm Chongqing, Coll Mat Sci & Engn, Chongqing 400044, Peoples R China
来源：
CATALYSIS COMMUNICATIONS | 2016年 / 85卷
基金：
中国国家自然科学基金;
关键词：
Selective catalytic reduction; HgCl2; V2O5-WO3/TiO2; Activity; Poisoning mechanism; VANADIA-TITANIA CATALYSTS; MERCURY OXIDATION; REDUCTION SCR; NITRIC-OXIDE; ELEMENTAL MERCURY; COAL COMBUSTION; FLUE-GASES; NH3; AMMONIA; NO;
D O I：
10.1016/j.catcom.2016.07.011
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：
In this paper, HgCl2 was loaded by impregnation method to study its property influence and poisoning mechanism on V2O5-WO3/TiO2 SCR-DeNO(x) catalyst. For HgCl2-containing catalysts, deactivation was observed in simulated gas stream, and its catalytic activity declined with the increase of HgCl2 loadings. Bronsted acid sites (V-OH) and V=O bond were affected evidently by HgCl2, new NH3 adsorption site Cl-V-O-H was generated after HgCl2 addition. Interactions between HgCl2 and V2O5 resulted in the loss of SCR active sites, and -HgCl existed as the stable form on the bridge site. Finally, the probable schematic diagram of HgCl2 poisoning mechanism was also proposed. (C) 2016 Elsevier B.V. All rights reserved.
引用
收藏
页码：34 / 38
页数：5
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