Browse Publications Technical Papers 2002-01-1724
2002-05-06

Development of deNOx Catalyst Based on Ag/Al2O3 Catalyst for Diesel Applications 2002-01-1724

Ag/Al2O3 was studied as a HC-SCR (Hydrocarbon - Selective Catalytic Reduction) catalyst for diesel application[1, 2 and 3]. Performance required of (or from) this catalyst is high NOx conversion with high thermal durability and sulfur resistance. Also low HC slip is desired. The Ag/Al2O3 system was improved by addition of additives.
In the diesel 13-mode (Japan) evaluation, improved Ag/Al2O3 catalyst showed higher de-NOx activity (>50%) compared to the original when fresh. Improved Al2O3 catalyst showed smaller hysteresis of de-NOx activity between ramping up and down the temperature and smaller amount of HC slip.
To study the improvement effect, interactions between the HC and catalyst were investigated by TG/DTA-MS (define) and FT-IR (define). TG/DTA measurement results showed that HC/O2 reaction was restrained in the improved catalyst. These results suggest that there was sufficient of HC for NOx reduction on the improved catalyst.

SAE MOBILUS

Subscribers can view annotate, and download all of SAE's content. Learn More »

Access SAE MOBILUS »

Preview Document Add to Cart
Members save up to 16% off list price.
Login to see discount.
Special Offer: Download multiple Technical Papers each year? TechSelect is a cost-effective subscription option to select and download 12-100 full-text Technical Papers per year. Find more information here.
We also recommend:
TECHNICAL PAPER

NOx Storage and Reduction on Differentiated Chemistry Catalysts for Lean Gasoline Vehicles

2001-01-3665

View Details

TECHNICAL PAPER

Gasoline Sulfur Effect on Emissions from Vehicles Equipped with Lean NOx Catalyst under Mileage Accumulation Tests

2003-01-3077

View Details

TECHNICAL PAPER

Speciated Hydrocarbon Conversion on a Fresh Pd/Rh Three-Way Catalyst

950932

View Details

X