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

LIANG Quan-ming; LIANG Wen-jun; ZHANG Tie-jun; FAN Xing; SONG Li-yun; LI Jian; HE Hong; YUE Tao

Volume 46 Issue 11

Nov. 2018

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Article Navigation > Journal of Fuel Chemistry and Technology > 2018 > 46(11): 1370-1376

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.

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.

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

LIANG Quan-ming^{1, 2},
LIANG Wen-jun¹,
ZHANG Tie-jun¹,
FAN Xing¹,
SONG Li-yun¹,
LI Jian^{1
,
,},
HE Hong^{1
,
,},
YUE Tao²

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

Funds:

the National Key Research and Development Program of China 2017YFC0210303

the Natural Science Foundation of Beijing, China 8152011

Received Date: 2018-07-20
Rev Recd Date: 2018-09-13

Available Online: 2021-01-23

Publish Date: 2018-11-10

Abstract

Abstract

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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References(28)

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