期刊
CATALYSIS COMMUNICATIONS
卷 85, 期 -, 页码 34-38出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.catcom.2016.07.011
关键词
Selective catalytic reduction; HgCl2; V2O5-WO3/TiO2; Activity; Poisoning mechanism
资金
- National Natural Science Foundation of China [51274263]
- Chongqing Natural Science Foundation [cstc2013jjB0035]
- Chongqing Application Development Project [cstc2014yykfB100007]
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.
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