globalchange  > 气候减缓与适应
DOI: 10.1177/1468087417750937
WOS ID: WOS:000456679100009
Measurement of automobile N2O from bag and continuous stream by quantum cascade laser spectroscopy
Author: Rahman, Montajir1; Rooney, Richard1; Hara, Kenji2; Nakatani, Shigeru3
Corresponding Author: Rahman, Montajir
ISSN: 1468-0874
EISSN: 2041-3149
Publishing Year: 2019
Volume: 20, Issue:2, Pages:261-273
Language: 英语
Keyword: Quantum cascade laser ; nitrous oxide ; green house gas ; chemiluminescence ; non-dispersive infrared ; laser spectroscopy ; exhaust emission ; catalytic converter ; chassis dynamometer
WOS Category: Thermodynamics ; Engineering, Mechanical ; Transportation Science & Technology
WOS Research Area: Thermodynamics ; Engineering ; Transportation
English Abstract:

N2O emission from automobile has been regulated by the United States Environment Protection Agency due to its higher global warming potential compared to CO2. Responding to this, an instrument for fast sensing of ultra-low concentration of N2O from automobile has become an urgent need. In this study, an instrument based on the quantum cascade laser spectroscopy has been developed and applied for certification testing of ultra-low N2O in automobile exhaust. The pulsed quantum cascade laser can emit coherent lights in the mid-infrared region where N2O shows strong absorption and better control of wavelength. Therefore, a very low detection limit can be achieved and interference of co-existing gases can be avoided using a super fine resolution of the mid-infrared spectrum. The US Code of Federal Regulations Parts 1065/1066 allows measuring N2O from sample storage bags, from a continuous dilute stream or a raw exhaust stream. Typically, batch (bag) sampling has better accuracy and repeatability, but continuous sampling is more efficient in terms of test cell running time and provides test-mode emissions. In this study, the quantum cascade laser analyzer has been applied to investigate correlations between bag sampling and continuous dilute exhaust sampling using a fleet of vehicles with a wide range of N2O emission levels all meeting United States Environment Protection Agency emission standards. Very good correlation between these two sampling methods was observed for the majority of tests conducted and in best case the difference was less than +/- 1%. The direct injection gasoline vehicle emits higher N2O than conventional port injection gasoline vehicles. The quantum cascade laser analyzer has been successfully applied for United States Environment Protection Agency N2O certification test.

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Document Type: 期刊论文
Appears in Collections:气候减缓与适应

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Affiliation: 1.HORIBA Instruments Inc, 5900 Hines Dr, Ann Arbor, MI 48108 USA
2.HORIBA Ltd, Kyoto, Japan
3.HORIBA Europe GmbH, Oberursel, Germany

Recommended Citation:
Rahman, Montajir,Rooney, Richard,Hara, Kenji,et al. Measurement of automobile N2O from bag and continuous stream by quantum cascade laser spectroscopy[J]. INTERNATIONAL JOURNAL OF ENGINE RESEARCH,2019-01-01,20(2):261-273
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