气候变化领域集成服务门户(CCPortal): Emissions of carboxylic acids, hydrogen cyanide (HCN) and isocyanic acid (HNCO) from vehicle exhaust

CCPortal

DOI	10.1016/j.atmosenv.2021.118218
	Emissions of carboxylic acids, hydrogen cyanide (HCN) and isocyanic acid (HNCO) from vehicle exhaust
	Li T.; Wang Z.; Yuan B.; Ye C.; Lin Y.; Wang S.; Sha Q.; Yuan Z.; Zheng J.; Shao M.
发表日期	2021
ISSN	1352-2310
卷号	247
英文摘要	Organic acids play important roles in the atmosphere by contributing to formation of secondary organic aerosol (SOA), cloud condensation nuclei (CCN), and rainwater acidity. Vehicle emissions can be an important source of organic acids in urban environments. In this study, we carried out chassis dynamometer tests to measure C1–C5 carboxylic acids, hydrogen cyanide (HCN), and isocyanic acid (HNCO) from gasoline, diesel, and liquefied petroleum gas (LPG) vehicles using an iodide-adduct time-of-flight chemical ionization mass spectrometer (I− ToF-CIMS). We present fuel-based and mileage-based emission factors base on 31 vehicles under different stages of emission standards. Our measurements show that emission factors of carboxylic acids from diesel vehicles are much higher than those from gasoline vehicles. The determined emission factors of formic acid from diesel vehicles (130 ± 134 mg/kgfuel) are nearly 800 times higher than those from gasoline vehicles (0.16 ± 0.18 mg/kgfuel), which suggests that fuel type is a key metrics affecting emission factors of carboxylic acids from motor vehicles. We quantified the emission factors of toxic species HCN (gasoline: 10.4 ± 17.5 mg/kgfuel, diesel: 12.5 ± 7.49 mg/kgfuel) and HNCO (gasoline: 0.09 ± 0.25 mg/kgfuel, diesel: 2.26 ± 8.94 mg/kgfuel). Although the main source of organic acids is likely to be related to secondary production mechanisms on global scales according to previous research, our results highlight that primary emissions from vehicles may contribute significantly to local and finer regional scales. Emission factors of organic acids obtained in this study can be used to constrain the budget of organic acids in urban environments. © 2021 Elsevier Ltd
关键词	Carboxylic acids Diesel Emission factor Gasoline Hydrogen cyanide Isocyanic acid
语种	英语
scopus关键词	Budget control; Carboxylic acids; Cyanides; Diesel engines; Diesel locomotives; Dynamometers; Gasoline; Hydrogen economy; Ionization of gases; Urban planning; Vehicles; Chassis dynamometer tests; Chemical ionization; Cloud condensation nuclei; Liquefied petroleum gas (LPG); Primary emissions; Secondary organic aerosols; Secondary production; Urban environments; Liquefied petroleum gas; acrylic acid; butyric acid; carboxylic acid; diesel fuel; gasoline; hydrogen cyanide; iodide ion; isocyanate; liquefied petroleum gas; methyl iodide; propionic acid; aerosol; carboxylic acid; concentration (composition); condensation; formic acid; liquefied petroleum gas; rainwater; secondary production; traffic emission; urban ecosystem; air pollution control; carbon footprint; comparative study; controlled study; environmental temperature; exhaust gas; priority journal; secondary organic aerosol; time of flight mass spectrometry; time series analysis; urban area
来源期刊	ATMOSPHERIC ENVIRONMENT
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/248586
作者单位	Institute for Environmental and Climate Research, Jinan University, Guangzhou, 511443, China; Guangdong-Hongkong-Macau Joint Laboratory of Collaborative Innovation for Environmental Quality, Guangzhou, China; State Joint Key Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing, 100871, China; College of Environment and Energy, South China University of Technology, University Town, Guangzhou, 510006, China
推荐引用方式 GB/T 7714	Li T.,Wang Z.,Yuan B.,et al. Emissions of carboxylic acids, hydrogen cyanide (HCN) and isocyanic acid (HNCO) from vehicle exhaust[J],2021,247.
APA	Li T..,Wang Z..,Yuan B..,Ye C..,Lin Y..,...&Shao M..(2021).Emissions of carboxylic acids, hydrogen cyanide (HCN) and isocyanic acid (HNCO) from vehicle exhaust.ATMOSPHERIC ENVIRONMENT,247.
MLA	Li T.,et al."Emissions of carboxylic acids, hydrogen cyanide (HCN) and isocyanic acid (HNCO) from vehicle exhaust".ATMOSPHERIC ENVIRONMENT 247(2021).