This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Development of a Real-time NH3 Gas Analyzer Utilizing Chemi-luminescence Detection for Vehicle Emission Measurement
Technical Paper
2004-01-2907
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
Recently, after-treatment techniques for diesel engine emission have made remarkable progress with the development of suitable De-NOx catalysts. The urea-injection SCR system is one of the candidates for a high efficiency De-NOx method for diesel engine emissions. This system reduces NOx through a reaction with ammonia (NH3) that is generated from injected urea. In this system, it is very important to control the amount and timing of the urea injection so as to minimize the NH3 gas slip. Therefore, NH3 gas measurement is becoming important during the development of NOx after-treatment systems even though NH3 is not a target component of the current emission regulations. In this paper, a new NH3 gas analyzer utilizing a chemi-luminescence detection (CLD) method has been developed. The new NH3 analyzer consists of dual detectors (DCLDs) and a furnace for a NH3 oxidization catalyst. Real-time concentration of NH3 can be calculated from the difference of NOx readings of two detectors. Basic performances such as response time and interference effect have been discussed here. Additionally, NH3 measurement in exhaust gas from a diesel engine vehicle with a urea-SCR system, as well as a lean burn gasoline engine vehicle with a three-way catalyst will be presented. Comparisons with conventional methods for NH3 measurement, such as fourier transform infra-red (FTIR) gas analyzer and soft ionization mass spectrometer (SIMS), are also described.
Recommended Content
Authors
- Shigeru Nakatani - HORIBA, Ltd.
- Tomoshi Yoshimura - HORIBA, Ltd.
- Yuichi Mori - HORIBA, Ltd.
- Nobutaka Kihara - HORIBA, Ltd.
- Masayuki Adachi - HORIBA, Ltd.
- Yuichi Goto - National Traffic Safety and Environment Laboratory (NTSEL), Japan
- Hisakazu Suzuki - National Traffic Safety and Environment Laboratory (NTSEL), Japan
Topic
Citation
Nakatani, S., Yoshimura, T., Mori, Y., Kihara, N. et al., "Development of a Real-time NH3 Gas Analyzer Utilizing Chemi-luminescence Detection for Vehicle Emission Measurement," SAE Technical Paper 2004-01-2907, 2004, https://doi.org/10.4271/2004-01-2907.Also In
Emissions Measurement and Testing, Advanced Catalysts and Substrates, and Diesel Gaseous Emissions
Number: SP-1899; Published: 2004-10-25
Number: SP-1899; Published: 2004-10-25
References
- Gregory D et al. 1999 JSAE Convention 40-99 9
- Nakatani S. et al. “Application of a magnetic sector type hydrogen analyzer for engine emission measurement” SAE 2001-01-0210
- Tennison Paul et al. “NOx control development with urea SCR on a diesel passenger car” SAE 2004-01-1291
- Lambert Christine et al. “Technical advantage of urea SCR for light-duty and heavy-duty diesel vehicle applications” SAE 2004-01-1292
- Suzuki H. et al. “Evaluation of ammonia continuous measurement techniques for automobile exhaust gas” JSAE20045287