On-road emission characteristics of VOCs from diesel trucks in Beijing, China

Yao, Zhiliang; Shen, Xianbao; Yu, Ye; Cao, Xinyue; Jiang, Xi; Zhang, Yingzhi; He, Kebin

doi:10.1016/j.atmosenv.2014.12.028

Cited by 105 publications

(47 citation statements)

References 32 publications

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“…As key O 3 precursors, VOCs react with nitrogen oxides (NO x ) in the presence of sunlight, leading to photochemical pollution with elevated O 3 concentration. Due to intense and uncontrolled emissions of VOCs, mega-cities and city clusters in China, such as Beijing (Yao et al, 2015;Wei et al, 2014), the Yangtze River Delta of eastern China Xue et al, 2014), and the Pearl River Delta (PRD) of southern China Cheng et al, 2010) currently suffer from severe photochemical pollution.…”

Section: Introductionmentioning

confidence: 99%

Ambient volatile organic compounds and their effect on ozone production in Wuhan, central China

Lyu

Chen²,

Guo

et al. 2016

Science of The Total Environment

217

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Section: Introductionmentioning

confidence: 99%

Ambient volatile organic compounds and their effect on ozone production in Wuhan, central China

Lyu

Chen²,

Guo

et al. 2016

Science of The Total Environment

217

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“…Chassis dynamometer tests can be used for the measurement of emission factors under controlled conditions [7][8][9]. The portable emission measurement system (PEMS) is a well-known method which measures the exhaust emissions under real-world conditions [10][11][12][13]. Other methods for emission exhaust measurements are remote sensing [14] and tunnel studies [15].…”

Section: Introductionmentioning

confidence: 99%

The Relative Contributions of Mobile Sources to Air Pollutant Emissions in Tehran, Iran: an Emission Inventory Approach

Shahbazi

Reyhanian

Hosseini

et al. 2016

Emiss. Control Sci. Technol.

113

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Tehran, a city with 8.5 million inhabitants, has suffered from rapid and unplanned urbanization in recent years resulting in substantial environmental impacts perhaps foremost of which is poor air quality. A major source of air pollution is emissions from mobile vehicles; therefore, having an accurate and comprehensive mobile source emission inventory is essential for decision-makers to develop mitigating strategies. The aim of this study is to determine the relative contributions of specific mobile sources to key air pollutants through the development of an emissions inventory for mobile sources in the city of Tehran using the International Vehicle Emissions (IVE) model. Tehran traffic data were acquired to obtain link level emission rates, using IVE emission rates. The developed emission inventory was evaluated using Tehran gasoline sales data. The results indicate that the sources of carbon monoxide (CO), volatile organic compound (VOC), nitrogen oxide (NO x ), and sulfur oxide (SO x ) emissions are mainly passenger cars. The contribution of emissions of CO, VOCs, and particulate matter (PM) from motorcycles to the total traffic emissions is more than 15, 31, and 12 %, respectively. Despite the fact that medium and heavy-duty vehicles (minibuses, buses, and trucks) only comprise 2.4 % of the Tehran fleet, they contribute more than 41, 64, and 85 % of the NO x , SO x , and PM emissions, respectively. Analyzing the distribution of the aggregated emission of pollutants shows that emissions are mostly higher in central zones due to the high traffic rate of passenger cars, taxis, motorcycles, and buses.

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“…It should be noted here that intermediate VOCs (IVOCs) were not identified or quantified in this study, which may cause an underestimation of the actual SOA yields. Furthermore, the VOC source profiles of three types of diesel trucks (light-, middle-and heavy-duty trucks) from Yao et al (2015) and the profiles of heavyduty diesel trucks from Huang et al (2015) were referenced to use in calculations and to compare with VOC profiles from this research. The average VOC source profile for light-duty gasoline passenger vehicles was also taken from previous research in China to make further comparisons.…”

Section: Soa Yields and Ofps Of Vocs From Ship Exhaustsmentioning

confidence: 99%

Characteristics of marine shipping emissions at berth: profiles for particulate matter and volatile organic compounds

Xiao

Liu

et al. 2018

Atmos. Chem. Phys.

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Abstract. Emissions from ships at berth play an important role regarding the exposure of high density human populations to atmospheric pollutants in port areas; however, these emissions are not well understood. In this study, volatile organic compounds (VOCs) and particle emissions from 20 container ships at berth were sampled and analyzed during the "fuel switch" period at Jingtang Port in Hebei Province, China. VOCs and particles were analyzed using a gas chromatography-mass spectrometer (GC-MS) and a single particle aerosol mass spectrometer (SPAMS), respectively. VOC analysis showed that alkanes and aromatics, especially benzene, toluene and heavier compounds e.g., n-heptane, noctane and n-nonane, dominated the total identified species. Secondary organic aerosol (SOA) yields and ozone (O 3 ) forming potential were 0.017 ± 0.007 g SOA g −1 VOCs and 2.63 ± 0.37 g O 3 g −1 VOCs, respectively. Both positive and negative ion mass spectra from individual ships were derived and the intensity of specific ions were quantified. Results showed that elemental carbon (35.74 %), elemental carbon-organic carbon mixtures (33.95 %) and Na-rich particles (21.12 %) were major classes, comprising 90.7 % of the particles observed. Particles from ship auxiliary engines were in the 0.2 to 2.5 µm size range, with a peak occurring at around 0.4 µm. The issue of using vanadium (V) as tracer element was examined, and it was found that V was not a proper tracer of ship emissions when using low sulfur content diesel oil. The average percentage of sulfate particles observed in shipping emissions before and after switching to marine diesel oil remained unchanged at 24 %. Under certain wind conditions, when berths were upwind of emission sources, the ratios before and after 1 January were 35 and 27 % respectively. The impact of atmospheric stability was discussed based on PM 2.5 and primary pollutant (carbon monoxide) concentration. With a background of frequent haze episodes and complex mechanisms of particulate accumulation and secondary formation, the impact of atmospheric stability is believed to have been weak on the sulfate contribution from shipping emissions. The results from this study provide robust support for port area air quality assessment and source apportionment.

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On-road emission characteristics of VOCs from diesel trucks in Beijing, China

Cited by 105 publications

References 32 publications

Ambient volatile organic compounds and their effect on ozone production in Wuhan, central China

Ambient volatile organic compounds and their effect on ozone production in Wuhan, central China

The Relative Contributions of Mobile Sources to Air Pollutant Emissions in Tehran, Iran: an Emission Inventory Approach

Characteristics of marine shipping emissions at berth: profiles for particulate matter and volatile organic compounds

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