Key Characteristrics of the Sorption Process in Lean Nox Traps

Paper #:
  • 2003-01-3246

Published:
  • 2003-10-27
DOI:
  • 10.4271/2003-01-3246
Citation:
Chakravarthy, K., Daw, C., and Lenox, K., "Key Characteristrics of the Sorption Process in Lean Nox Traps," SAE Technical Paper 2003-01-3246, 2003, doi:10.4271/2003-01-3246.
Pages:
15
Abstract:
We study the NOx storage process in lean NOx traps using bench-flow experiments and simulated diesel exhaust. Given that formulation alone is an inadequate indicator of performance (due to the effects of manufacturing processes) a minimal set of experiments is always needed to compare the performance of LNTs. We define simple performance measures based on such a set of experiments that can be used to compare lean phase operations of various LNTs under various conditions concisely. Though the noble metal sites are essential for storage, the benefits of increasing noble metal loading start to wane beyond a certain limit. Our experiments suggest a possibility that a lean NOx reduction reaction may be occuring in LNTs. If this reaction is confirmed further in future experiments, its products need to be identified. The sorbent shifts the equilibrium between NO and NO2 towards NO. We propose an experimental protocol for generating the adsorption isotherm for NOx storage from equilibrium capacity measurements that can be used for verifying kinetic mechanisms and for developing simulation models.
Access
Now
SAE MOBILUS Subscriber? You may already have access.
Buy
Select
Price
List
Download
$27.00
Mail
$27.00
Members save up to 40% off list price.
Share
HTML for Linking to Page
Page URL

Related Items

Training / Education
2017-06-06
Technical Paper / Journal Article
2003-10-27
Technical Paper / Journal Article
2004-03-08
Article
2016-03-04
Training / Education
2017-04-03
Article
2016-03-01