Effects of MoO3 and CeO2 doping on the decomposition and reactivity of NH4HSO4 on V2O5/TiO2 catalysts

被引：16
作者：
Xu, Wenqing [1 ,2 ]
Gao, Lei [1 ,3 ]
Yang, Yang [1 ]
Zhu, Tingyu [1 ,2 ]
Qi, Guisheng [3 ]
机构：
[1] Chinese Acad Sci, Res Ctr Proc Pollut Control, Inst Proc Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Beijing 100190, Peoples R China
[2] Chinese Acad Sci, Inst Urban Environm, Ctr Excellence Reg Atmospher Environm, Xiamen 361021, Peoples R China
[3] North Univ China, Shanxi Prov Key Lab Higee Oriented Chem Engn, Taiyuan 030051, Shanxi, Peoples R China
来源：
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH | 2020年 / 27卷 / 24期
关键词：
Ammonium bisulfate; Decomposition; Low-temperature SCR; MoO3; doping; CeO2; V2O5; TiO2; catalyst; SIMULTANEOUS REMOVAL; SCR PERFORMANCE; SO2; RESISTANCE; NO REDUCTION; TEMPERATURE; NH3; BEHAVIORS; NH3-SCR; OXIDES; CERIA;
D O I：
10.1007/s11356-020-09343-6
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
The deposition of NH4HSO4 on catalysts is one of the key issues for selective catalytic reduction of NOx. In this study, NH4HSO4 was preloaded on catalysts, and the effects of MoO3 and CeO2 doping on the decomposition and reactivity of NH4HSO4 on V2O5/TiO2 catalysts are studied. The results show that the introduction of MoO3 and CeO2 significantly promoted NOx conversion on the V2O5/TiO2 catalysts. Doping with MoO3 could effectively enhance the S and H2O resistance of the catalysts. Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS) analysis indicate that it is the strong chemical interactions between NH4HSO4 and the catalysts that are adverse to the decomposition of NH4HSO4. However, doping with MoO3 apparently inhibits these interactions, which significantly decrease the decomposition temperature of NH4HSO4. In situ FTIR experiments show that the NH4+ in preloaded NH4HSO4 could react with gaseous NO on catalysts, and doping with MoO3 could facilitate the reaction rate.
引用
收藏
页码：30243 / 30253
页数：11
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