Journal of Industrial and Engineering Chemistry

  • Volume 54
  • /
  • Pages.359-368
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  • 2017
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  • 1226-086X(pISSN)
  • /
  • 1876-794X(eISSN)
The Korean Society of Industrial and Engineering Chemistry (한국공업화학회)
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Enhanced activity and stability of the monolithic Pt/SiO2-Al2O3 diesel oxidation catalyst promoted by suitable tungsten additive amount

  • Liang, Yanli (Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University) ;
  • Zhao, Ming (Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University) ;
  • Wang, Jianli (Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University) ;
  • Sun, Mengmeng (Institute of New Energy and Low-Carbon Technology, Sichuan University) ;
  • Li, Shanshan (Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University) ;
  • Huang, Yufen (Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University) ;
  • Zhong, Lin (College of Chemical Engineering, Sichuan University) ;
  • Gong, Maochu (Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University) ;
  • Chen, Yaoqiang (Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University)
  • Received : 2017.02.22
  • Accepted : 2017.06.07
  • Published : 2017.10.25
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Abstract

A series of the modified $Pt/SiO_2-Al_2O_3$ diesel oxidation catalysts with different $WO_3$ loading were prepared through co-impregnation method. With an optimum additive loading of 2 wt% $WO_3$, the catalyst significantly improved the performance and its stability. Compared to the free-tungsten sample, the catalyst increased the maximum conversion of NO by 5-10% and decreased the reaction temperature for 30% NO conversion by $7-28^{\circ}C$. It was found that there exist the electron and structure interaction between platinum and tungsten species. The interactions can generate and maintain more Pt sites in metallic state for the catalytic oxidation with enhanced activity and stability.

Keywords

Acknowledgement

Supported by : Ministry of Science and Technology (China)

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