Selective catalytic reduction of NO with ammonia over V2O5-Sb2O3-TiO2 at low temperature and resistance to H2O and SO2 poisoning

CAO Zheng; HUANG Yan; PENG Li-li; LI Jian-guang

Volume 40 Issue 04

Apr. 2012

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Article Navigation > Journal of Fuel Chemistry and Technology > 2012 > (04): 456-462

CAO Zheng, HUANG Yan, PENG Li-li, LI Jian-guang. Selective catalytic reduction of NO with ammonia over V2O5-Sb2O3-TiO2 at low temperature and resistance to H2O and SO2 poisoning[J]. Journal of Fuel Chemistry and Technology, 2012, (04): 456-462.

Citation:

CAO Zheng, HUANG Yan, PENG Li-li, LI Jian-guang. Selective catalytic reduction of NO with ammonia over V₂O₅-Sb₂O₃-TiO₂ at low temperature and resistance to H₂O and SO₂ poisoning[J]. Journal of Fuel Chemistry and Technology, 2012, (04): 456-462.

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Selective catalytic reduction of NO with ammonia over V₂O₅-Sb₂O₃-TiO₂ at low temperature and resistance to H₂O and SO₂ poisoning

1.
Department of Environmental Science and Engineering, Xiangtan University, Xiangtan 411105, China;
2.
Baotou Iron and Streel Group Co., Ltd., Baotou 014000, China

Received Date: 2011-04-11
Rev Recd Date: 2011-07-29
Publish Date: 2012-04-30

Abstract

Abstract

The V₂O₅-Sb₂O₃-TiO₂ catalyst was prepared by impregnation method. The influences of V₂O₅and Sb₂O₃ loading, pH value, and calcination temperature on the low temperature selective catalytic reduction (SCR) activities of NO with ammonia over V₂O₅-Sb₂O₃-TiO₂ catalyst were studied. The performance of V₂O₅-Sb-TiO₂ catalyst in resisting the H₂O and SO₂ poisoning was also discussed. The results show that the catalyst has the best SCR activity. When the V₂O₅ and Sb₂O₃ loading is 5% and 2%, respectively, the calcination temperature is 400℃, and the pH value is 4. The NO removal efficiency of 97% is obtained at the reaction temperature of 220℃. The addition of Sb₂O₃ not only strengthens the catalytic activity of V₂O₅-TiO₂, but also improves the resistance to the deactivation by both H₂O and SO₂. The SO₂ and NO adsorption transient response and TG-DTG test demonstrate that the promoting mechanism of Sb₂O₃is mainly to promote the catalyst adsorption of NO, and weaken the interaction between ammonium sulfate and the catalyst, which can result in the decomposition of ammonium sulfate easier.
- V₂O₅-Sb₂O₃ -TiO₂,
- low temperature,
- selective catalytic reduction,
- NO

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References

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