The influence of the pore structure on the SO2 tolerance for selective catalytic reduction of NOx with NH3 over MnOx-TiO2/MWCNTs catalysts

  • Chong Xie
  • Jian-Wen ShiEmail author
  • Shenghui YangEmail author
  • Xifei LiEmail author
Research Paper


The MnOx-TiO2/MWCNTs nanocomposites were used as De-NOx catalysts to study the deep-rooted reason for the deactivation. Based on a series of characterization on as-prepared catalyst and poisoned catalyst, the results showed that the chief culprit for the deactivation is the micropores in the De-NOx catalyst. The formed ammonium (bi)sulfate in the micropores during the SCR reaction process could not be took away by the gas flow soon and then deposited on the catalyst surface gradually, and further covered the active sites. And the poisoned catalysts could be recovered partly rather than fully by heat treatment at 500 °C because of the decomposition of the ammonium (bi)sulfate and the phase transition of the TiO2.


De-NOx catalysts Carbon nanotubes Deactivation Pore structure Nanostructures 


Funding information

Financial support was provided by the National Key Research and Development Program of China (Project No. 2018YFB0105900).

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.


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© Springer Nature B.V. 2019

Authors and Affiliations

  1. 1.Institute of Advanced Electrochemical Energy & School of Materials Science and EngineeringXi’an University of TechnologyXi’anChina
  2. 2.Center of Nanomaterials for Renewable Energy, State Key Laboratory of Electrical Insulation and Power Equipment, School of Electrical EngineeringXi’an Jiaotong UniversityXi’anChina
  3. 3.School of Materials Science and EngineeringXi’an University of TechnologyXi’anChina

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