气候变化领域集成服务门户(CCPortal): Highly oxygenated organic molecules produced by the oxidation of benzene and toluene in a wide range of OH exposure and NOx conditions

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DOI	10.5194/acp-21-12005-2021
	Highly oxygenated organic molecules produced by the oxidation of benzene and toluene in a wide range of OH exposure and NOx conditions
	Cheng X.; Chen Q.; Jie Li Y.; Zheng Y.; Liao K.; Huang G.
发表日期	2021
ISSN	1680-7316
起始页码	12005
结束页码	12019
卷号	21 期号:15
英文摘要	Oxidation of aromatic volatile organic compounds (VOCs) leads to the formation of tropospheric ozone and secondary organic aerosol, for which gaseous oxygenated products are important intermediates. We show, herein, the experimental results of highly oxygenated organic molecules (HOMs) produced by the oxidation of benzene and toluene in a wide range of OH exposure and NOx conditions. The results suggest that multigeneration OH oxidation plays an important role in the product distribution, which likely proceeds more preferably via H subtraction than OH addition for early generation products from light aromatics. More oxygenated products present in our study than in previous flow tube studies, highlighting the impact of experimental conditions on product distributions. The formation of dimeric products, however, was suppressed and might be unfavorable under conditions of high OH exposure and low NOx in toluene oxidation. Under high-NOx conditions, nitrogen-containing multifunctional products are formed, while the formation of other HOMs is suppressed. Products containing two nitrogen atoms become more important as the NOx level increases, and the concentrations of these compounds depend significantly on NO2. The highly oxygenated nitrogen-containing products might be peroxyacyl nitrates, implying a prolonged effective lifetime of RO2 that facilitates regional pollution. Our results call for further investigation on the roles of high-NO2 conditions in the oxidation of aromatic VOCs. © Copyright:
语种	英语
scopus关键词	aerosol; atmospheric chemistry; benzene; concentration (composition); hydroxyl radical; molecular analysis; nitrogen oxides; organic compound; oxidation; toluene
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/246663
作者单位	State Key Joint Laboratory of Environmental Simulation and Pollution Control, BIC-ESAT and IJRC, Peking University, Beijing, China; Department of Civil and Environmental Engineering, Faculty of Science and Technology, University of Macau, Taipa, Macau
推荐引用方式 GB/T 7714	Cheng X.,Chen Q.,Jie Li Y.,et al. Highly oxygenated organic molecules produced by the oxidation of benzene and toluene in a wide range of OH exposure and NOx conditions[J],2021,21(15).
APA	Cheng X.,Chen Q.,Jie Li Y.,Zheng Y.,Liao K.,&Huang G..(2021).Highly oxygenated organic molecules produced by the oxidation of benzene and toluene in a wide range of OH exposure and NOx conditions.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(15).
MLA	Cheng X.,et al."Highly oxygenated organic molecules produced by the oxidation of benzene and toluene in a wide range of OH exposure and NOx conditions".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.15(2021).