Volatile organic compounds from a mixed fleet with numerous E10-fuelled vehicles in a tunnel study in China: Emission characteristics, ozone formation and secondary organic aerosol formation

Jin, Boqiang; Zhu, Rencheng; Hui, Mei; Wang, Menglei; Zu, Lei; Shang, Yu; Zhang, Ruiqin; Li, Shunyi; Bao, Xiaojun

doi:10.1016/j.envres.2021.111463

Cited by 16 publications

(6 citation statements)

References 46 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A study by Jin et al (2021) identified that low-carbon alkanes (e.g., ethane, propane, and isopentane), alkenes (e.g., ethylene, propene, and 1-butene), and aromatics (e.g., benzene, toluene, and m/p-xylene) were the main groups in the tunnel study and that vehicle emissions agreed well between this factor and the source profiles (R = 0.59). Different profiles of combustion sources were investigated, and the correlation between the results of NG combustion and the PMF factor was strongest (R = 0.57).…”

Section: Comparison Between the Composite Source Profiles And The Pmf...mentioning

confidence: 91%

Measurement report: Intra- and interannual variability and source apportionment of volatile organic compounds during 2018–2020 in Zhengzhou, central China

Shang

Wang

et al. 2022

Atmos. Chem. Phys.

Self Cite

View full text Add to dashboard Cite

Abstract. Ambient volatile organic compounds (VOCs) were measured continuously from January 2018 to December 2020 at an urban site in Zhengzhou (China) to investigate their characteristics, sources, atmospheric oxidation capacity (AOC), and chemical reactivity. During the sampling period, the total concentration of observed VOCs was 94.3±53.1 µg m−3, and alkanes were the major VOC species, accounting for 58 % of the total. During the sampling period, the interannual variation in VOCs gradually reduced from 113.2±65.2 µg m−3 in 2018 to 90.7±52.5 µg m−3 in 2019 and 79.1±41.7 µg m−3 in 2020. Ethane and propane were the top two most abundant species during the 3-year observation period. Results showed that the total AOC, dominated by OH radical reactions, was 7.4×107 molec. cm−3 s−1. Total OH reactivity was 45.3 s−1, and it was mainly contributed by NOx. The AOC and ⚫OH reactivity both exhibited well-defined seasonal and interannual patterns. Therefore, control strategies should focus on the key species given their interannual and seasonal variations. Meanwhile, diagnostic ratios of VOC species indicated that VOCs in Zhengzhou were greatly affected by vehicle emissions and liquid petroleum gas/natural gas (LPG/NG). Positive matrix factorization analysis identified six sources: industrial sources, solvent use, vehicle emissions, LPG/NG, fuel burning, and biogenic sources. Vehicle emissions and industrial sources made the largest contributions to VOC emissions in each of the 3 years. The proportion of the contributions of vehicle emissions and LPG/NG increased with each passing year. However, the proportion of industrial and solvent sources presented a decreasing trend, which reflects the remarkable effect of control policies. The effect of VOCs on O3 formation suggests that vehicle emissions and solvent use remain key sources. Therefore, it is necessary to formulate effective strategies for reducing ground-level O3, and those sources mentioned above should be strictly controlled by the regulatory authorities.

show abstract

Section: Comparison Between the Composite Source Profiles And The Pmf...mentioning

confidence: 91%

Measurement report: Intra- and interannual variability and source apportionment of volatile organic compounds during 2018–2020 in Zhengzhou, central China

Shang

Wang

et al. 2022

Atmos. Chem. Phys.

Self Cite

View full text Add to dashboard Cite

show abstract

“…Tunnel-type infrastructures have always been affected by gas concentration levels, so monitoring these levels has important applications in their operation and maintenance (O&M). Road tunnels support high levels of combustion gases, such as carbon oxides (COx), nitrogen (NOx), and particulate matter (PM), or organic compound species, such as volatile organic compound (VOC), or hydrocarbons (HCs), such as BTEX (benzene, toluene, ethylbenzene and xylene) [ 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 ]. Keeping adequate concentration levels of these gases is essential for their facility management (FM).…”

Section: Introductionmentioning

confidence: 99%

A Review of Gas Measurement Practices and Sensors for Tunnels

Cepa

Pavón

Caramés

et al. 2023

Sensors

View full text Add to dashboard Cite

The concentration of pollutant gases emitted by traffic in a tunnel affects the indoor air quality and contributes to structural deterioration. Demand control ventilation systems incur high operating costs, so reliable measurement of the gas concentration is essential. Numerous commercial sensor types are available with proven experience, such as optical and first-generation electrochemical sensors, or novel materials in detection methods. However, all of them are subjected to measurement deviations due to environmental conditions. This paper presents the main types of sensors and their application in tunnels. Solutions will also be discussed in order to obtain reliable measurements and improve the efficiency of the extraction systems.

show abstract

“…It is widely known that motor vehicle exhaust emissions have become a major anthropogenic source of urban atmospheric pollution with the explosive growth of vehicle population, especially in the metropolitan cities in China [1,2]. China has been the world's largest automobile manufacturer and seller for twelve consecutive years since 2009 [3].…”

Section: Introductionmentioning

confidence: 99%

“…To identify the characteristics of vehicular emissions, various test methods were adopted in previous studies. For example, traffic tunnel measurement [2,6], remote sensing technology [7,8], the dynamometer test [9,10] and roadside sampling [11]. However, due to the different test principles, results obtained with these methods may not accurately reflect the exhaust emission characterization under real driving conditions, which means test vehicles being driven on the public roads in real traffic [12].…”

Section: Introductionmentioning

confidence: 99%

“…However, due to the different test principles, results obtained with these methods may not accurately reflect the exhaust emission characterization under real driving conditions, which means test vehicles being driven on the public roads in real traffic [12]. The average concentration of NOx in an urban tunnel was tested by Jin et al, but the test concentration was the mixed concentration of the vehicles in the tunnel and to yield the contaminant concentration of the individual vehicle [2]. Remote sensing technology, as an economical method for vehicle rapid monitoring, is commonly used to identify high-emission vehicles, which is not suitable for experimental testing of light-duty vehicles [11,13].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Characterization of Exhaust CO, HC and NOx Emissions from Light-Duty Vehicles under Real Driving Conditions

Hui

Wang

et al. 2021

Atmosphere

Self Cite

View full text Add to dashboard Cite

On-road exhaust emissions from light-duty vehicles are greatly influenced by driving conditions. In this study, two light-duty passenger cars (LDPCs) and three light-duty diesel trucks (LDDTs) were tested to investigate the on-road emission factors (EFs) with a portable emission measurement system. Emission characteristics of carbon monoxide (CO), hydrocarbons (HC) and nitrogen oxides (NOx) emitted from vehicles at different speeds, accelerations and vehicle specific power (VSP) were analyzed. The results demonstrated that road conditions have significant impacts on regulated gaseous emissions. CO, NOx, and HC emissions from light-duty vehicles on urban roads increased by 1.1–1.5, 1.2–1.4, and 1.9–2.6 times compared with those on suburban and highway roads, respectively. There was a rough positive relationship between transient CO, NOx, and HC emission rates and vehicle speeds, while the EFs decreased significantly with the speed decrease when speed ≤ 20 km/h. The emissions rates of NOx and HC tended to increase and then decrease as the acceleration increased and the peak occurred at 0 m/s2 without considering idling conditions. For HC and CO, the emission rates were low and changed gently with VSP when VSP < 0, while emission rates increased gradually with the VSP increase when VSP > 0. For NOx NOx emission rates were lower and had no obvious change when VSP < 0. However, NOx emissions were positively correlated with VSP, when VSP > 0.

show abstract

Volatile organic compounds from a mixed fleet with numerous E10-fuelled vehicles in a tunnel study in China: Emission characteristics, ozone formation and secondary organic aerosol formation

Cited by 16 publications

References 46 publications

Measurement report: Intra- and interannual variability and source apportionment of volatile organic compounds during 2018–2020 in Zhengzhou, central China

Measurement report: Intra- and interannual variability and source apportionment of volatile organic compounds during 2018–2020 in Zhengzhou, central China

A Review of Gas Measurement Practices and Sensors for Tunnels

Characterization of Exhaust CO, HC and NOx Emissions from Light-Duty Vehicles under Real Driving Conditions

Contact Info

Product

Resources

About