Journal of Northeastern University Natural Science ›› 2019, Vol. 40 ›› Issue (6): 908-912.DOI: 10.12068/j.issn.1005-3026.2019.06.027

• Materials & Metallurgy • Previous Articles    

Regeneration-Modification of Deactivated V2O5-based Catalyst Used for Low Load Condition Denitration

SHANG Da1,2, LI Bao-kuan1   

  1. 1.School of Metallurgy, Northeastern University, Shenyang 110819, China; 2.Science and Technology Development Co., Ltd., China Energy Engineering Group, Tianjin 300012, China.
  • Received:2018-05-14 Revised:2018-05-14 Online:2019-06-15 Published:2019-06-14
  • Contact: LI Bao-kuan
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Abstract: The power plant based deactivated catalyst was characterized by XRD, XRF and BET and the cause of deactivation was determined as As2O3, alkali metal poisoning. However, the crystal structure of the deactivated catalyst did not change and had a high specific surface area. H2C2O4(0.01mol/L) and NH3·H2O(0.015mol/L) was applied to regenerate the catalyst, and the content of SO3, As2O3, K2O and Na2O on the surface of the catalyst could be reduced to 0.09wt.%, 0.05wt.%, 0.02wt.% and 0.01wt.%, respectively. The activity of the catalyst could be recovered after the reloading of 1.5% V2O5. After loading 3wt.% CuO, the catalyst showed good catalytic activity at low temperatures. The NOx conversion rate of V2O5-CuO/TiO2 at 220, 250, 280 and 310℃ was 62.4%, 82.2%, 90.8% and 95.5%, respectively.

Key words: deactivation, regeneration, modification, low load, V2O5-based catalyst

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