Original Paper

Plasma Chemistry and Plasma Processing

, Volume 34, Issue 4, pp 825-836

Shielded Sliding Discharge-Assisted Hydrocarbon Selective Catalytic Reduction of NOx over Ag/Al2O3 Catalysts Using Diesel as a Reductant

  • Xiaoying BaoAffiliated withGeneral Electric Global Research Center
  • , Muhammad Arif MalikAffiliated withFrank Reidy Research Center for Bioelectrics, Old Dominion University Email author 
  • , Daniel G. NortonAffiliated withGeneral Electric Global Research Center
  • , Vasile B. NeculaesAffiliated withGeneral Electric Global Research Center Email author 
  • , Karl H. SchoenbachAffiliated withFrank Reidy Research Center for Bioelectrics, Old Dominion University
  • , Richard HellerAffiliated withFrank Reidy Research Center for Bioelectrics, Old Dominion University
  • , Oltea P. SiclovanAffiliated withGeneral Electric Global Research Center
  • , Susan E. CorahAffiliated withGeneral Electric Global Research Center
  • , Antonio CaiafaAffiliated withGeneral Electric Global Research Center
    • , Louis P. InzinnaAffiliated withGeneral Electric Global Research Center
    • , Kenneth R. ConwayAffiliated withGeneral Electric Global Research Center

Rent the article at a discount

Rent now

* Final gross prices may vary according to local VAT.

Get Access

Abstract

The nonthermal plasma generated in a shielded sliding discharge reactor was used to reform diesel for the hydrocarbon-selective catalytic reduction (HC-SCR) of NOx on Ag/Al2O3 catalysts. Compared with raw diesel, the reformed diesel enhanced the NOx reduction efficiency, mitigated hydrocarbon poisoning of the catalyst and reduced the fuel penalty for the HC-SCR reaction. The NOx conversion values obtained with a commercial Ag/Al2O3 catalyst exceeded that of a 2.0 wt% Ag/Al2O3 catalyst prepared by wet impregnation. A significant amount of NH3 was produced as a by-product during the HC-SCR reaction, which suggests that further NOx conversion enhancement can be achieved by placing a second NH3-SCR catalyst in series with the Ag/Al2O3 catalyst.

Keywords

Reforming Diesel NOx SCR Ag/Al2O3 Nonthermal plasma Shielded sliding discharge Flue gas treatment