气候变化领域集成服务门户(CCPortal): Measurement report: Distinct emissions and volatility distribution of intermediate-volatility organic compounds from on-road Chinese gasoline vehicles: Implication of high secondary organic aerosol formation potential

CCPortal

DOI	10.5194/acp-21-2569-2021
	Measurement report: Distinct emissions and volatility distribution of intermediate-volatility organic compounds from on-road Chinese gasoline vehicles: Implication of high secondary organic aerosol formation potential
	Tang R.; Lu Q.; Guo S.; Wang H.; Song K.; Yu Y.; Tan R.; Liu K.; Shen R.; Chen S.; Zeng L.; Jorga S.D.; Zhang Z.; Zhang W.; Shuai S.; Robinson A.L.
发表日期	2021
ISSN	1680-7316
起始页码	2569
结束页码	2583
卷号	21 期号:4
英文摘要	In the present work, we performed chassis dynamometer experiments to investigate the emissions and secondary organic aerosol (SOA) formation potential of intermediate-volatility organic compounds (IVOCs) from an on-road Chinese gasoline vehicle. High IVOC emission factors (EFs) and distinct volatility distribution were recognized. The IVOC EFs for the China V vehicle ranged from 12.1 to 226.3 mg per kilogram fuel, with a median value of 83.7 mg per kilogram fuel, which was higher than that from US vehicles. Besides, a large discrepancy in volatility distribution and chemical composition of IVOCs from Chinese gasoline vehicle exhaust was discovered, with larger contributions of B14-B16 compounds (retention time bins corresponding to C14-C16 n-alkanes) and a higher percentage of n-alkanes. Further we investigated the possible reasons that influence the IVOC EFs and volatility distribution and found that fuel type, starting mode, operating cycles and acceleration rates did have an impact on the IVOC EF. When using E10 (ethanol volume ratio of 10 %, v=v) as fuel, the IVOC EF of the tested vehicle was lower than that using commercial China standard V fuel. The average IVOC-to-THC (total hydrocarbon) ratios for gasoline-fueled and E10-fueled gasoline vehicles were 0:07 ± 0:01 and 0:11 ± 0:02, respectively. Cold-start operation had higher IVOC EFs than hot-start operation. The China Light-Duty Vehicle Test Cycle (CLTC) produced 70 % higher IVOCs than those from the Worldwide Harmonized Light Vehicles Test Cycle (WLTC). We found that the tested vehicle emitted more IVOCs at lower acceleration rates, which leads to high EFs under CLTC. The only factor that may influence the volatility distribution and compound composition is the engine aftertreatment system, which has compound and volatility selectivity in exhaust purification. These distinct characteristics in EFs and volatility may result in higher SOA formation potential in China. Using published yield data and a surrogate equivalent method, we estimated SOA formation under different OA (organic aerosol) loading and NOx conditions. Results showed that under low-and high-NOx conditions at different OA loadings, IVOCs contributed more than 80 % of the predicted SOA. Furthermore, we built up a parameterization method to simply estimate the vehicular SOA based on our bottomup measurement of VOCs (volatile organic compounds) and IVOCs, which would provide another dimension of information when considering the vehicular contribution to the ambient OA. Our results indicate that vehicular IVOCs contribute significantly to SOA, implying the importance of reducing IVOCs when making air pollution controlling policies in urban areas of China. © 2021 Author(s).
语种	英语
scopus关键词	aerosol formation; atmospheric pollution; chemical composition; measurement method; nitrogen oxides; organic compound; pollution control; China
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/247128
作者单位	State Key Joint Laboratory of Environmental Simulation and Pollution Control, International Joint Laboratory for Regional Pollution Control, Ministry of Education (IJRC), College of Environmental Sciences and Engineering, Peking University, Beijing, 100871, China; School of Environment and Materials Engineering, Yantai University, Yantai, 264003, China; Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, Nanjing University of Information Science and Technology, Nanjing, 210044, China; Center for Atmospheric Particle Studies, Carnegie Mellon University, Pittsburgh, PA 15213, United States; Department of Mechanical Engineering, Carnegie Mellon University, Pittsburgh, PA 15213, United States; State Key Laboratory of Automotive Safety and Energy, School of Vehicle and Mobility, Tsinghua University, Beijing, 100084, China
推荐引用方式 GB/T 7714	Tang R.,Lu Q.,Guo S.,et al. Measurement report: Distinct emissions and volatility distribution of intermediate-volatility organic compounds from on-road Chinese gasoline vehicles: Implication of high secondary organic aerosol formation potential[J],2021,21(4).
APA	Tang R..,Lu Q..,Guo S..,Wang H..,Song K..,...&Robinson A.L..(2021).Measurement report: Distinct emissions and volatility distribution of intermediate-volatility organic compounds from on-road Chinese gasoline vehicles: Implication of high secondary organic aerosol formation potential.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(4).
MLA	Tang R.,et al."Measurement report: Distinct emissions and volatility distribution of intermediate-volatility organic compounds from on-road Chinese gasoline vehicles: Implication of high secondary organic aerosol formation potential".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.4(2021).