DOI: 10.1016/j.atmosenv.2015.07.006
Scopus记录号: 2-s2.0-84938074112
论文题名: Primary emissions and secondary organic aerosol formation from the exhaust of a flex-fuel (ethanol) vehicle
作者: Suarez-Bertoa R ; , Zardini A ; A ; , Platt S ; M ; , Hellebust S ; , Pieber S ; M ; , El Haddad I ; , Temime-Roussel B ; , Baltensperger U ; , Marchand N ; , Prévôt A ; S ; H ; , Astorga C
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2015
卷: 117 起始页码: 200
结束页码: 211
语种: 英语
英文关键词: Acetaldehyde
; Aerosol mass spectrometry
; Carbonyls
; Ozone formation potential
; Secondary organic aerosol
; Unregulated emissions
Scopus关键词: Acetaldehyde
; Air quality
; Amphibious vehicles
; Aromatic compounds
; Carbon
; Ethanol
; Fuels
; Mass spectrometry
; Mixtures
; Ozone
; Temperature
; Vehicles
; Aerosol mass spectrometry
; Carbonyls
; Ozone formation potentials
; Secondary organic aerosols
; Unregulated emissions
; Aerosols
; acetaldehyde
; acetic acid
; alcohol
; aromatic compound
; biofuel
; black carbon
; methylglyoxal
; organic carbon
; ozone
; acetaldehyde
; aerosol composition
; aerosol property
; air quality
; emission inventory
; exhaust emission
; mass spectrometry
; organic matter
; particle size
; photochemistry
; traffic emission
; Article
; Italy
; low temperature
; oxidation
; priority journal
; secondary organic aerosol
; smog
; Ispra
; Italy
; Lombardy
; Varese
Scopus学科分类: Environmental Science: Water Science and Technology
; Earth and Planetary Sciences: Earth-Surface Processes
; Environmental Science: Environmental Chemistry
英文摘要: Incentives to use biofuels may result in increasing vehicular emissions of compounds detrimental to air quality. Therefore, regulated and unregulated emissions from a Euro 5a flex-fuel vehicle, tested using E85 and E75 blends (gasoline containing 85% and 75% of ethanol (vol/vol), respectively), were investigated at 22 and -7 °C over the New European Driving Cycle, at the Vehicle Emission Laboratory at the European Commission Joint Research Centre Ispra, Italy. Vehicle exhaust was comprehensively analyzed at the tailpipe and in a dilution tunnel. A fraction of the exhaust was injected into a mobile smog chamber to study the photochemical aging of the mixture. We found that emissions from a flex-fuel vehicle, fueled by E85 and E75, led to secondary organic aerosol (SOA) formation, despite the low aromatic content of these fuel blends. Emissions of regulated and unregulated compounds, as well as emissions of black carbon (BC) and primary organic aerosol (POA) and SOA formation were higher at -7 °C. The flex-fuel unregulated emissions, mainly composed of ethanol and acetaldehyde, resulted in very high ozone formation potential and SOA, especially at low temperature (860 mg O3 km-1 and up to 38 mg C kg-1). After an OH exposure of 10 × 106 cm-3 h, SOA mass was, on average, 3 times larger than total primary particle mass emissions (BC + POA) with a high O:C ratio (up to 0.7 and 0.5 at 22 and -7 °C, respectively) typical of highly oxidized mixtures. Furthermore, high resolution organic mass spectra showed high 44/43 ratios (ratio of the ions m/z 44 and m/z 43) characteristic of low-volatility oxygenated organic aerosol. We also hypothesize that SOA formation from vehicular emissions could be due to oxidation products of ethanol and acetaldehyde, both short-chain oxygenated VOCs, e.g. methylglyoxal and acetic acid, and not only from aromatic compounds. © 2015 The Authors.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/81620
Appears in Collections: 气候变化事实与影响
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作者单位: European Commission, Joint Research Centre (JRC), Institute for Energy and Transport (IET), Sustainable Transport Unit, Ispra, VA, Italy; Laboratory of Atmospheric Chemistry, Paul Scherrer Institute (PSI), Villigen, Switzerland; Aix-Marseille Université, CNRS, LCE FRE 3416, Marseille, France
Recommended Citation:
Suarez-Bertoa R,, Zardini A,A,et al. Primary emissions and secondary organic aerosol formation from the exhaust of a flex-fuel (ethanol) vehicle[J]. Atmospheric Environment,2015-01-01,117