Enhanced hydrothermal stability of a manganese metavanadate catalyst based on WO3–TiO2 for the selective catalytic reduction of NOx with NH3

  • Jiaqi Liu
  • Meiqing Shen
  • Chenxu Li
  • Jianqiang Wang
  • Jun WangEmail author


A catalyst with 1 wt% manganese metavanadate (MnV2O6) based on WO3–TiO2 is prepared and applied to the selective catalytic reduction of NOx with NH3. After hydrothermal aging treatment at 750 °C for 12 h, it performs excellent activity with a wide temperature window. The catalysts are characterized by XRD, BET, DSC, UV–Vis, NH3-TPD and in situ FT-IR. With the introduction of MnV2O6, the sintering and phase transformation of TiO2 from anatase to rutile are suppressed during the aging process. Simultaneously, the excessive agglomeration of vanadium species and growth of crystalline V2O5 are hindered. The superior hydrothermal stability is attributed to the higher melting point of MnV2O6. The strong interaction between V and Mn contributes to maintain the vanadium species and inhibits the promoting effect of free vanadia on sintering and rutilization of support. MnV2O6 based catalyst exhibits higher adsorption capacity and activation ability of ammonia species after aging, which are in favor of the de-NOx activity.


Manganese metavanadate SCR De-NOx Superior hydrothermal stability High melting point 



The authors acknowledge the National key research and development program (Grant No. 2017YFC0211302).

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

Supplementary material

11144_2019_1624_MOESM1_ESM.docx (6.3 mb)
Supplementary material 1 (DOCX 6419 kb)


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Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2019

Authors and Affiliations

  • Jiaqi Liu
    • 1
  • Meiqing Shen
    • 1
    • 2
    • 3
  • Chenxu Li
    • 1
  • Jianqiang Wang
    • 1
  • Jun Wang
    • 1
    Email author
  1. 1.Key Laboratory for Green Chemical Technology of State Education Ministry, School of Chemical Engineering & TechnologyTianjin UniversityTianjinPeople’s Republic of China
  2. 2.Collaborative Innovation Center of Chemical Science and Engineering (Tianjin)TianjinPeople’s Republic of China
  3. 3.State Key Laboratory of EnginesTianjin UniversityTianjinPeople’s Republic of China

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