Yujie Fu1, Qi Xin1, Shuo Zhang1,2, Yang Yang This email address is being protected from spambots. You need JavaScript enabled to view it.1

1 Institute for Thermal Power Engineering, Zhejiang University Hangzhou, Hangzhou, Zhejiang, China
2 MCC Capital Engineering & Research Incorporation Ltd., Beijing, China


Received: August 23, 2021
Revised: October 18, 2021
Accepted: October 20, 2021

 Copyright The Author(s). This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are cited.


Download Citation: ||https://doi.org/10.4209/aaqr.210214  


Cite this article:

Fu, Y., Xin, Q., Zhang, S., Yang, Y. (2021). Simultaneous Catalytic Removal of VOCs and NOx with the Dual-layered Catalyst of CoCeOx and V2O5/TiO2. Aerosol Air Qual. Res. 21, 210214. https://doi.org/10.4209/aaqr.210214


HIGHLIGHTS

  • Dual-layered catalysts were constructed for simultaneous removal of NO and propane.
  • Simultaneous removal mechanism of NO and propane was revealed by In-situ DRIFT.
  • The functions of the V2O5/TiO2 and CoCeOx in the catalytic reaction were revealed.
 

ABSTRACT


NO and volatile organic compounds (VOCs) are ones of exhaust with high irritation and toxicity, thus it is very necessary to develop a catalyst that can simultaneously remove them. In this study, a type of dual-layered catalyst has been prepared by combining CoCeOx and V2O5/TiO2 as different functional layers. The dual-layered catalyst was tested under NO, NH3, propane and the mixing atmosphere, achieving great NOx removal efficiency and good propane degradation under wide range temperature window. It is presented that NO conversion could reach 100% at 225°C and kept more than 80% at 175–300°C, while VOCs degradation reached 80% above 260°C. Moreover, the dual-layered catalyst with different construction is surveyed to reveal the mechanism included in this special construction. It is supposed that V2O5/TiO2 layer possesses rich acid sites which adsorbs NH3 as an ammonia buffer part and CoCeOx layer provides good oxidizing ability to oxidize NO and propane. The combination moderates the competitive adsorption between NH3 and propane which is the initial obstacle for multiple pollutants removal.


Keywords: Simultaneous removal of propane and NO, Dual-layered catalyst, Reaction mechanism, Cobalt cerium catalyst




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