Shielded Sliding Discharge-Assisted Hydrocarbon Selective Catalytic Reduction of NO sub(x) over Ag/Al sub(2)O sub(3) Catalysts Using Diesel as a Reductant

• Published in: Plasma chemistry and plasma processing Vol. 34; no. 4; pp. 825 - 836
• Main Authors: Bao, Xiaoying, Malik, Muhammad Arif, Norton, Daniel G, Neculaes, Vasile B, Schoenbach, Karl H, Heller, Richard, Siclovan, Oltea P, Corah, Susan E, Caiafa, Antonio, Inzinna, Louis P, Conway, Kenneth R
• Format: Journal Article
• Language: English
• Published: 01.07.2014
• Subjects: Aluminum oxide; Byproducts; Catalysis; Catalysts; Diesel; Diesel fuels; Reduction; Silver
• ISSN: 0272-4324; 1572-8986
• DOI: 10.1007/s11090-014-9551-3

The nonthermal plasma generated in a shielded sliding discharge reactor was used to reform diesel for the hydrocarbon-selective catalytic reduction (HC-SCR) of NO sub(x) on Ag/Al sub(2)O sub(3) catalysts. Compared with raw diesel, the reformed diesel enhanced the NO sub(x) reduction efficiency, mitigated hydrocarbon poisoning of the catalyst and reduced the fuel penalty for the HC-SCR reaction. The NO sub(x) conversion values obtained with a commercial Ag/Al sub(2)O sub(3) catalyst exceeded that of a 2.0 wt% Ag/Al sub(2)O sub(3) catalyst prepared by wet impregnation. A significant amount of NH sub(3) was produced as a by-product during the HC-SCR reaction, which suggests that further NO sub(x) conversion enhancement can be achieved by placing a second NH sub(3)-SCR catalyst in series with the Ag/Al sub(2)O sub(3) catalyst.