DOI: 10.1016/j.atmosenv.2016.11.064
Scopus记录号: 2-s2.0-85002540814
论文题名: Contribution of methyl group to secondary organic aerosol formation from aromatic hydrocarbon photooxidation
作者: Li L ; , Qi L ; , Cocker D ; R ; , III
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2017
卷: 151 起始页码: 133
结束页码: 139
语种: 英语
英文关键词: Aromatic hydrocarbon
; HR-ToF-AMS
; Isotope
; Methyl substitute
; Photooxidation
; Secondary organic aerosol
Scopus关键词: Aerosols
; Aromatic compounds
; Aromatization
; Hydrocarbons
; Isotopes
; Oxidation
; Photooxidation
; Xylene
; Aromatic structures
; Atmospheric oxidation
; Gas phase oxidation
; Methyl substitute
; Oxidation products
; Ring opening reaction
; Secondary organic aerosols
; Tof-ams
; Aromatic hydrocarbons
; aromatic hydrocarbon
; carbon
; carbon 13
; meta xylene
; methyl group
; nitric oxide
; organic nitrate
; para xylene
; xylene
; aerosol formation
; aromatic hydrocarbon
; carbon
; photooxidation
; reaction kinetics
; spectrometer
; analytic method
; Article
; chemical composition
; gas
; high resolution time of flight aerosol mass spectrometry
; isotope labeling
; photooxidation
; physical phase
; priority journal
; ring opening
; secondary organic aerosol
; structure analysis
; time of flight mass spectrometry
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: The complete atmospheric oxidation pathways leading to secondary organic aerosol remain elusive for aromatic compounds including the role of methyl substitutes on oxidation. This study investigates the contribution of methyl group to Secondary Organic Aerosol (SOA) formation during the photooxidation of aromatic hydrocarbons under low NOx condition by applying methyl carbon labeled aromatic hydrocarbons ((13C2) m-xylene and (13C2) p-xylene). Particle and gas phase oxidation products are analyzed by a series of mass spectrometers (HR-TOF-AMS, PTR-MS and SIFT-MS). The methyl group carbon containing oxidation products partition to the particle-phase at a lower rate than the carbons originating from the aromatic ring as a result of ring opening reactions. Further, the methyl carbon in the original aromatic structure is at least 7 times less likely to be oxidized when forming products that partition to SOA than the aromatic ring carbon. Therefore, oxidation of the methyl group in xylenes exerts little impact on SOA formation in current study. This study provides supporting evidence for a recent finding — a similarity in the SOA formation and composition from aromatic hydrocarbons regardless of the alkyl substitutes. © 2016 Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/82274
Appears in Collections: 气候变化事实与影响
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作者单位: University of California, Department of Chemical and Environmental Engineering, Riverside, CA, United States; College of Engineering-Center for Environmental Research and Technology (CE-CERT), Riverside, CA, United States
Recommended Citation:
Li L,, Qi L,, Cocker D,et al. Contribution of methyl group to secondary organic aerosol formation from aromatic hydrocarbon photooxidation[J]. Atmospheric Environment,2017-01-01,151