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Optimization of a Commercially Available Chemiluminscence Analyzer for Low Level NOx Measurement
Technical Paper
2003-01-0389
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
As automotive exhaust emission levels reduce, there is a need for increased sensitivity of the NOx measurement. This paper documents work performed to increase the sensitivity of the existing Rosemount NGA 2000 CLD Analyzer. The effects of sample flow rate, ozone flow rate and ozone supply gas were explored. Limit of Detection (LOD) and Converter Efficiency were evaluated. The goal of this optimization has been to provide a cost effective and expeditious method to improve the low level NOx measurement. Changing the ozone generator supply gas from air to oxygen and increasing the sample and ozone flow rates resulted in a LOD improvement from 17 ppb to 8 ppb.
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Citation
DeCarteret, S., Jones, S., Focht, K., Loo, J. et al., "Optimization of a Commercially Available Chemiluminscence Analyzer for Low Level NOx Measurement," SAE Technical Paper 2003-01-0389, 2003, https://doi.org/10.4271/2003-01-0389.Also In
References
- Rosemount NGA2000 CLD Manual
- CARB NMOG LOD Procedure
- Code of Federal Regulations, 40 CFR Part 86.1 23 178
- Code of Federal Regulations, 40 CFR Part 86.1 323 2007