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Investigating Semi-Volatile Organic Compound Emissions from Light-Duty Vehicles
| 题名： | Investigating Semi-Volatile Organic Compound Emissions from Light-Duty Vehicles |
| 作者： | Goldstein, A.; Robinson, A.; Kroll, J. |
| 关键词： | Light-duty gasoline vehicles (LDGV)##Organic aerosol##Fuels##Particulate matter##Secondary organic aerosol (SOA)##Super ultra-low emission vehicle (SULEV)##Volatile organic compounds (VOCs)##Semi volatile organic compounds (SVOCs)##Emissions testing##Data analysis algorithms## |
| 摘要： | The formation of secondary organic aerosol (SOA) in the atmosphere is a complex and relatively poorly understood subject that is the subject much research. Recent research suggested that emissions from late model light-duty gasoline vehicles (LDGVs) might be disproportionate contributors to SOA formation because of differences in SOA yields compared to older model year vehicles. The objective of this project was to investigate the SOA formation from a small test fleet of forward-looking late model LDGVs by conducting vehicle emissions testing in conjunction with smog chamber experiments and data analysis. Results from this project indicate that contrary to earlier conclusions/assumptions, emissions from later model year LDGVs do not contain a more potent mix of SOA precursors compared to older model year vehicles, when smog chamber experiments are conducted under similar ratios of volatile organic compounds and oxides of nitrogen (VOCs- NOX ratios), and, that SOA formation will be reduced as the fleet turns over to newer model year LDGVs. However, results also indicate that SOA production is influenced by VOC:NOX ratios, and this suggests that SOA formation may actually increase in future years as NOX emissions are reduced, and some regions shift from being high NOX regions to low NOX regions. |
| 总页数： | 226 |
| 报告类型： | 科技报告 |
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