Citation: LIANG Quan-ming, LIANG Wen-jun, ZHANG Tie-jun, FAN Xing, SONG Li-yun, LI Jian, HE Hong, YUE Tao. Effects of Cl ions on low-temperature NO conversion by NH₃ over V₂O₅-WO₃/TiO₂ catalysts[J]. Journal of Fuel Chemistry and Technology, ;2018, 46(11): 1370-1376. shu

Effects of Cl ions on low-temperature NO conversion by NH₃ over V₂O₅-WO₃/TiO₂ catalysts

LIANG Quan-ming ^1,2 ,
LIANG Wen-jun ¹ ,
ZHANG Tie-jun ¹ ,
FAN Xing ¹ ,
SONG Li-yun ¹ ,
LI Jian ^1,, ,
HE Hong ^1,, ,
YUE Tao ²

1.
Key Laboratory of Beijing on Regional Air Pollution Control, Beijing University of Technology, Beijing 100124, China
2.
Beijing Municipal Institute of Labor Protection, Beijing 100054, China

Corresponding author: LI Jian, ljian@bjut.edu.cn HE Hong, hehong@bjut.edu.cn
Received Date: 20 July 2018
Revised Date: 13 September 2018

Fund Project: The project was supported by the National Key Research and Development Program of China (2017YFC0210303) and the Natural Science Foundation of Beijing, China (8152011)the National Key Research and Development Program of China 2017YFC0210303the Natural Science Foundation of Beijing, China 8152011

Figures(7)

The Cl-V₂O₅-WO₃/TiO₂ catalysts were prepared by impregnation methods. With the Cl ions content increased from 0 to 2.5%, the NO conversion of Cl-V₂O₅-WO₃/TiO₂ catalysts increased at first and then decreased. Combined with the experimental results, 1.5% Cl-V₂O₅-WO₃/TiO₂ catalyst was the optimal catalyst, NO conversion was higher than 95% in the range of 149-362℃, and NO conversion was higher than 90% in the temperature range of 145-385℃. The catalysts were characterized by XRF, BET, XRD, TG, FT-IR and H₂-TPR. The specific surface area and pore volume of the catalysts decreased in different degrees after adding SO₂ and H₂O in reactant gas. The poisoned catalysts deposited sulfur species and contained NH₄⁺ and SO₄^2-. Adding appropriate amount of Cl ions inhibited the formation of side byproducts and enhanced the poisoning resistance of V₂O₅-WO₃/TiO₂ catalyst.
- Cl ions,
- low temperature SCR,
- sulfur resistance,
- catalyst poisoning
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Effects of Cl ions on low-temperature NO conversion by NH3 over V2O5-WO3/TiO2 catalysts

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Effects of Cl ions on low-temperature NO conversion by NH₃ over V₂O₅-WO₃/TiO₂ catalysts