| Title: | "Primary organic gas emissions in vehicle cold start events: Rates, compositions and temperature effects" |
| Author(s): | Zhang Z; Man H; Zhao J; Jiang Y; Zeng M; Cai Z; Huang C; Huang W; Zhao H; Jing S; Shi X; He K; Liu H; |
| Address: | "State Key Joint Laboratory of ESPC, State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex, School of Environment, Tsinghua University, Beijing 100084, China. Key Laboratory of Pollution Control and Resource Recycling of Fujian Province, College of Environmental Science and Engineering, Fujian Normal University, Fuzhou 350007, China. State Environmental Protection Key Laboratory of Formation and Prevention of Urban Air Pollution Complex, Shanghai Academy of Environmental Sciences, Shanghai 200233, China. Shanghai Motor Vehicle Inspection Certification & Tech Innovation Center Co., Ltd, Shanghai 201805, China. State Environmental Protection Key Laboratory of Vehicle Emission Control and Simulation, Chinese Research Academy of Environmental Sciences, Beijing 100012, China. State Key Joint Laboratory of ESPC, State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex, School of Environment, Tsinghua University, Beijing 100084, China. Electronic address: liu_env@tsinghua.edu.cn" |
| DOI: | 10.1016/j.jhazmat.2022.128979 |
| ISSN/ISBN: | 1873-3336 (Electronic) 0304-3894 (Linking) |
| Abstract: | "Identification of air toxics emitted from light-duty gasoline vehicles (LDGVs) is expected to better protect human health. Here, the volatile organic compound (VOC) and intermediate VOC (IVOC) emissions in the high-emitted start stages were measured on a chassis dynamometer under normal and extreme temperatures for China 6 LDGVs. Low temperature enhanced the emission rates (ERs) of both VOCs and IVOCs. The VOC ERs were averaged 5.19 +/- 2.74 times higher when the temperature dropped from 23 degrees C to 0 degrees C, and IVOCs were less sensitive to temperature change with an enlargement of 2.27 +/- 0.19 times. Aromatics (46.75 +/- 2.83%) and alkanes (18.46 +/- 1.21%) dominated the cold start VOC emissions under normal temperature, which was quite different from hot running emission profiles. From the perspective of emission inventories, changes in the speciated composition of VOCs and IVOCs were less important than that in the actual magnitude of ERs under cold conditions. However, changes in the ERs and emission profiles were equally important at high temperatures. Furthermore, high time-resolved measurements revealed that low temperature enhanced both the emission peak and peak duration of fuel components and incomplete combustion products during cold start, while high temperature only increased the peak concentration of fuel components" |
| Keywords: | *Air Pollutants/analysis Environmental Monitoring Gasoline/analysis Humans Motor Vehicles Temperature Vehicle Emissions/analysis *Volatile Organic Compounds/analysis Intermediate volatility organic compounds (IVOCs) Light-duty gasoline vehicles (LDGVs) Pr; |
| Notes: | "MedlineZhang, Zhining Man, Hanyang Zhao, Junchao Jiang, Yuheng Zeng, Meng Cai, Zhitao Huang, Cheng Huang, Wendong Zhao, Haiguang Jing, Shengao Shi, Xu He, Kebin Liu, Huan eng Research Support, Non-U.S. Gov't Netherlands 2022/04/27 J Hazard Mater. 2022 Aug 5; 435:128979. doi: 10.1016/j.jhazmat.2022.128979. Epub 2022 Apr 20" |
