Cu/Zeolite SCR on High Porosity Filters: Laboratory and Engine Performance Evaluations

2009-01-0897

04/20/2009

Event
SAE World Congress & Exhibition
Authors Abstract
Content
Selective catalytic reduction (SCR) is expected to be used extensively in the U.S. for diesel vehicle NOx control. Much progress has been made on improving performance and reducing complexity of SCR systems for vehicles in the past several years. SCR system complexity can be reduced further by implementation of SCR-coated diesel particulate filters (SCRFs). In this system, a high porosity (> 50%) filter substrate is coated with an SCR formulation, ideally in the pores of the filter walls, so that the DPF and SCR functions can be combined into a single catalyst.
Two state-of-the-art Cu/zeolite SCR formulations and three types of high porosity filter substrates were included in this study. Laboratory and engine-dynamometer tests were performed to measure NOx conversion under a variety of conditions to assess the impact of ammonia oxidation, inlet NO2/NOx ratio, ammonia/NOx ratio, oxygen level, space velocity, soot loading, and ammonia loading level. In general, SCRF technology was found to perform similarly to traditional channel-flow catalysts with the same type of active materials.
Meta TagsDetails
DOI
https://doi.org/10.4271/2009-01-0897
Pages
10
Citation
Cavataio, G., Girard, J., and Lambert, C., "Cu/Zeolite SCR on High Porosity Filters: Laboratory and Engine Performance Evaluations," SAE Technical Paper 2009-01-0897, 2009, https://doi.org/10.4271/2009-01-0897.
Additional Details
Publisher
Published
Apr 20, 2009
Product Code
2009-01-0897
Content Type
Technical Paper
Language
English