Study on Co-Effect of K₂SO₄ Deposition and Low Concentration SO₂ on Performances of V₂O₅/AC Catalysts for Low Temperature SCR

Xianlong Zhang, Bowen Shi, Xueping Wu, Zhanggen Huang, Zhenyu Liu, Baojun Yang, Cuiping Zhang

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DOI: 10.4236/aces.2011.14026                

Abstract

Simulated compounds were prepared by loading K₂SO₄ onto V₂O₅/AC catalysts. Study the effect of K₂SO₄ on V1/AC catalysts in the presence of low concentration SO₂. Transient response techniques, TPD was carried out. The results indicated that the DeNO activity of V1/AC catalysts was decreased seriously in the early period of operation, but the deactivation was gradually diminished with SO₂ adsorption and then, it was completely eliminated. For the sulphated catalysts (saturated catalysts by sulphate), their SCR activity were free from existence of gaseous SO₂. the loss of activity about 10% caused by K₂SO₄ was found on them. The deactivation of K₂SO₄ deposited catalysts was due to the decrease of adsorbed and activated NH₃, or some acid sites.

Keywords

Vanadium Oxide Catalyst, SCR, K₂SO₄ Deposition, Deactivation, Sulphated Catalyst

Conflicts of Interest

The authors declare no conflicts of interest.

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