Low Temperature Urea Decomposition and SCR Performance Oak Ridge National Laboratory

Format:

Conference/Event

Author/Creator:

Scott Sluder, C., author.

Conference Name:

SAE 2005 World Congress & Exhibition (2005-04-11 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2005

Summary:

Urea-SCR systems are potentially a highly-effective means of NOX reduction for light-duty diesel vehicles. However, use of urea-SCR technologies at low temperatures presents unique technical challenges. This study was undertaken to provide more knowledge about low temperature urea decomposition and the resulting effects on SCR performance. Data are presented for experiments using two SCR catalysts of differing size with a light-duty diesel engine. Analyses of the NOX reduction efficiency, NH3 storage phenomena, and unregulated emissions are shown. Over production of NO2 by the oxidation catalyst is demonstrated to be problematic at 25,000 hr-1 space velocity for a range of temperatures. This leads to production of N2O by both SCR catalysts that is higher when urea is injected than when NH3 is injected

Notes:

Vendor supplied data

Publisher Number:

2005-01-1858

Access Restriction:

Restricted for use by site license