globalchange  > 气候变化与战略
DOI: 10.1016/j.atmosenv.2019.117064
Intermediate and high ethanol blends reduce secondary organic aerosol formation from gasoline direct injection vehicles
Author: Roth P.; Yang J.; Peng W.; Cocker D.R.; III; Durbin T.D.; Asa-Awuku A.; Karavalakis G.
Source Publication: Atmospheric Environment
ISSN: 1352-2310
Publishing Year: 2020
Volume: 220
Language: 英语
Keyword: Aerosols ; Aromatic compounds ; Aromatization ; Blending ; Dynamometers ; Ethanol ; Ethanol fuels ; Exhaust systems (engine) ; Gasoline ; Organic carbon ; Particulate emissions ; Vehicles ; Aromatics ; Atmospheric chambers ; Gasoline direct injection ; Gasoline direct injection engine(GDI) ; Non-methane hydrocarbons ; Secondary inorganic aerosol ; Secondary organic aerosols ; Volatile organic carbons ; Direct injection ; alcohol ; ammonium nitrate ; aromatic compound ; gasoline ; hydrocarbon ; volatile organic compound ; aerosol ; aerosol formation ; ammonium nitrate ; ethanol ; nonmethane hydrocarbon ; particulate matter ; traffic emission ; transport vehicle ; aerosol ; Article ; atmosphere ; carbon footprint ; particulate matter ; priority journal ; secondary organic aerosol
Subject Area: Aromatics ; Ethanol ; Gasoline direct injection ; Secondary inorganic aerosol ; Secondary organic aerosol (SOA)
Abstract: We evaluated the secondary aerosol formation from two current technology flex fuel vehicles (FFVs) equipped with gasoline direct injection engines when operated on different fuel formulation on a chassis dynamometer. This study explored the influence of ethanol fueling and aromatic concentration on secondary organic aerosol (SOA) production by utilizing two E10 fuels with different aromatic levels and two higher ethanol blends (i.e., E30 and E78). The diluted emissions from both FFVs were photooxidized in a 30 m3 mobile atmospheric chamber with two distinct initial conditions, while the vehicles operated over cold-start and hot-start LA92 test cycles. Testing revealed that one vehicle did not produce secondary aerosol when emissions were photooxidized with a single precursor oxidant. However significant SOA formation occurred in the presence of an anthropogenic volatile organic carbon surrogate and NOx mixture in the chamber, despite the fact that both vehicles had similar primary particulate emission levels. The secondary aerosol formed in an urban airshed was mainly composed of ammonium nitrate and significantly exceeded primary tailpipe PM emissions. Cold-start operation from both vehicles led to greater secondary aerosol production compared to hot-start LA92 operation. SOA production showed a strong relationship with the tailpipe non-methane hydrocarbon (NMHC) emissions and overall reduced with higher ethanol blending in the fuel. The impact of aromatics was clear, with the higher aromatic E10 fuel showing higher SOA formation than the lower aromatic E10 fuel. © 2019 Elsevier Ltd
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Document Type: 期刊论文
Appears in Collections:气候变化与战略

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Affiliation: Department of Chemical and Environmental Engineering, Bourns College of Engineering, University of California, Riverside, CA 92521, United States; Bourns College of Engineering, Center for Environmental Research and Technology (CE-CERT), Riverside, CA 92507, United States; Department of Chemical and Biomolecular Engineering, A. James Clark School of Engineering, University of Maryland, College Park, 4418 Stadium Dr., College Park, MD 20702, United States

Recommended Citation:
Roth P.,Yang J.,Peng W.,et al. Intermediate and high ethanol blends reduce secondary organic aerosol formation from gasoline direct injection vehicles[J]. Atmospheric Environment,2020-01-01,220
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