title: Investigation of speciated VOC in gasoline vehicular exhaust under ECE and EUDC test cycles.
abstract: The emission factors and compositions of volatile organic compounds (VOC) in exhaust gas from in-use gasoline passenger cars were characterized using a chassis dynamometer. Three passenger cars were tested at the ECE and the EUDC drive cycles to represent both urban and suburban driving scenarios. Exhaust gas was collected in Summa canisters and analyzed by gas chromatography-mass spectrometry (GC-MS). Common gaseous emissions (CH(4), NOx, CO, and CO(2)) were measured by an on-board monitoring system. The VOC emission factors of different cars ranged from 0.10 to 0.25 g km(-1) at the ECE cycle, and 0.01-0.02 g km(-1) at the EUDC cycle. A total of 57 individual VOC were detected in the exhaust gas, and the weight percentages were very consistent among the three cars. Ethylene (11.80 wt.%), toluene (11.27 wt.%), and benzene (8.83 wt.%) were the most abundant VOC in exhaust gas. Aromatics (38.32%) dominated the low speed conditions (ECE), while alkanes (37.34%) were the major compounds at the high speed condition (EUDC). The total amount of alkenes did not change much between those two cycles, while ethylene is abundant in the ECE and EUDC cycles. Ozone formation potential (OFP) was calculated to estimate the ozone yield from VOC emissions by gasoline cars and the results showed that OFP of VOC emission at the ECE cycle was about ten times higher than that at the EUDC cycle.
authors: The College of Environmental Science and Engineering, State Environmental Protection Key Laboratory of Urban Ambient Air Particulate Matter Pollution Prevention and Control, Nankai University, Tianjin 300071, PR China.
authors: Jun
authors: J
authors: Wang
authors: Liangmao
authors: L
authors: Jin
authors: Junhua
authors: J
authors: Gao
authors: Jianwu
authors: J
authors: Shi
authors: Yanlin
authors: Y
authors: Zhao
authors: Shuangxi
authors: S
authors: Liu
authors: Taosheng
authors: T
authors: Jin
authors: Zhipeng
authors: Z
authors: Bai
authors: Chang-Yu
authors: CY
authors: Wu
mesh_terms: D001336:Automobiles; D004784:Environmental Monitoring; D004785:Environmental Pollutants / Q000032:analysis*; D005742:Gasoline; D010126:Ozone / Q000032:analysis / Q000737:chemistry; D001335:Vehicle Emissions / Q000032:analysis*; D055549:Volatile Organic Compounds / Q000032:analysis* / Q000737:chemistry
chemical_list: D004785:Environmental Pollutants; D005742:Gasoline; D001335:Vehicle Emissions; D055549:Volatile Organic Compounds; D010126:Ozone