The poisoning effect of sintering dust on V2O5–WO3/TiO2 catalyst for NOx removal in iron ore sintering flue gas

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

15 Scopus Citations
View graph of relations

Author(s)

  • Li-xin Qian
  • Long Ding
  • Hong-ming Long
  • Yu-lin Hu
  • Zheng-wei Yu

Detail(s)

Original languageEnglish
Pages (from-to)527-533
Journal / PublicationIronmaking and Steelmaking
Volume48
Issue number5
Online published17 Sept 2020
Publication statusPublished - 2021
Externally publishedYes

Abstract

NOx from iron ore sintering flue gas can be removed by selective catalytic reduction (SCR) over V2O5–WO3/TiO2 (VWTi) catalyst. In this work, the poisoning effects of K2SO4 and CaSO4 on the VWTi catalyst were investigated. The SCR activities and physicochemical properties of the fresh and poisoned catalysts were characterized. The results confirmed the deactivation of the poisoned catalysts, and the SCR activity decreased with increasing the concentration of the doped poisoning precursors. This reduced SCR activity could be related to the decreased reducibility of vanadium species and lower content of surface chemisorbed oxygen. Characterization of the poisoned catalysts showed migration of V 2p3/2 towards lower binding energy, reduced amount of NH3 desorption, and elimination of V=O stretching vibration bond, which could be attributed to the extension of V=O bond, consequently leading to the formation of –V–O–Ca/K bonds. A possible poisoning mechanism of the VWTi catalyst was proposed and discussed. © 2020 Institute of Materials, Minerals and Mining.

Research Area(s)

  • CaSO4, iron ore sintering, K2SO4, poisoning, V2O5–WO3/TiO2 catalyst

Citation Format(s)

The poisoning effect of sintering dust on V2O5–WO3/TiO2 catalyst for NOx removal in iron ore sintering flue gas. / Qian, Li-xin; Ding, Long; Long, Hong-ming et al.
In: Ironmaking and Steelmaking, Vol. 48, No. 5, 2021, p. 527-533.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review