Comparison of NOx emissions from China III and China IV in-use diesel trucks based on on-road measurements

Yao, Zheng; Wu, Bobo; Wu, Yunong; Cao, Xinyue; Jiang, Xi

doi:10.1016/j.atmosenv.2015.10.056

Cited by 54 publications

(13 citation statements)

References 21 publications

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“…Table 4 presents the comparison of the emission levels measured in this study to the ones of similar studies. Euro IV HDDTs in HK appear to be, more or less, at similar levels, except CO 2 emissions, compared to the levels reported by Yao et al [19] and Huo et al [10] (Beijing and Jinan, China). All emissions of the Euro V vehicles in this study were measured to be lower than those reported by Fontaras et al [11] (Milan Italy).…”

Section: Emissions Of Regulated Pollutantssupporting

confidence: 64%

Characterization of Real-World Pollutant Emissions and Fuel Consumption of Heavy-Duty Diesel Trucks with Latest Emissions Control

et al. 2019

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Heavy-duty diesel trucks (HDDTs) comprise a key source of road transport emissions and energy consumption worldwide mainly due to the growth of road freight traffic during the last two decades. Addressing their air pollutant and greenhouse gas emissions is therefore required, while accurate emission factors are needed to logistically optimize their operation. This study characterizes real-world emissions and fuel consumption (FC) of HDDTs and investigates the factors that affect their performance. Twenty-two diesel-fueled, Euro IV to Euro VI, HDDTs of six different manufacturers were measured in the road network of the Hong Kong metropolitan area, using portable emission measurement systems (PEMS). The testing routes included urban, highway and mixed urban/highway driving. The data collected corresponds to a wide range of driving, operating, and ambient conditions. Real-world distance- and energy-based emission levels are presented in a comparative manner to capture the effect of after-treatment technologies and the role of the evolution of Euro standards on emissions performance. The emission factors’ uncertainty is analyzed. The impact of speed, road grade and vehicle weight loading on FC and emissions is investigated. An analysis of diesel particulate filter (DPF) regenerations and ammonia (NH3) slip events are presented along with the study of Nitrous oxide (N2O) formation. The results reveal deviations of real-world HDDTs emissions from emission limits, as well as the significant impact of different operating and driving factors on their performance. The occasional high levels of N2O emissions from selective catalytic reduction equipped HDDTs is also revealed, an issue that has not been thoroughly considered so far.

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Section: Emissions Of Regulated Pollutantssupporting

confidence: 64%

Characterization of Real-World Pollutant Emissions and Fuel Consumption of Heavy-Duty Diesel Trucks with Latest Emissions Control

et al. 2019

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“…The EFs of the 16 PAHs and nine NPAHs based on the mileage traveled were calculated by the vehicle type, as shown in Table S2 in the Supplemental Materials. with the LDDTs and HDDTs, and similar trends were also found for the VOC EFs reported in our previous study (Yao et al, 2015c). Further investigation of emissions from MDDTs should be conducted in the future to explore this phenomenon.…”

Section: Emission Factors (Efs)supporting

confidence: 86%

Emission characteristics of polycyclic aromatic hydrocarbons and nitro-polycyclic aromatic hydrocarbons from diesel trucks based on on-road measurements

Cao

Hao

Shen

et al. 2017

Atmospheric Environment

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Polycyclic aromatic hydrocarbon (PAH) and nitro-polycyclic aromatic hydrocarbon (NPAH) emissions from 18 diesel trucks of different sizes and with different emission standards were tested in Beijing using a portable emission measurement system (PEMS). Both the gaseous-and particulate-phase PAHs and NPAHs were quantified by high-performance liquid chromatography (HPLC) in the laboratory. The emission factors (EFs) of the total PAHs from light-duty diesel trucks (LDDTs), medium-duty diesel trucks (MDDTs) and heavy-duty diesel trucks (HDDTs) were 82229.11±41906.06, 52867.43±18946.47 and 93837.35±32193.14 μg/km, respectively, much higher than the respective values of total NPAHs from their counterpart vehicles. The gaseous phase had an important contribution to the total PAHs and NPAHs, with a share rate of approximately 69% and 97% on average, respectively. The driving cycle had important impacts on the emissions of PAHs and NPAHs, especially for LDDTs and HDDTs. Higher emissions of PAHs and NPAHs were detected on non-highway roads compared to that on highways for these two types of vehicles. Compared to the results of different studies, the difference in the EFs of PAHs and NPAHs can reach several orders of magnitudes, which would introduce errors in the development of an emission inventory of PAHs and NPAHs.

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“…PTV VISSIM allowed the assembly of satellite images, on which it was possible to design the vehicular and pedestrian areas, roads, sidewalks, at the same time it was necessary to introduce the information generated from the counting campaigns to allow the software to simulate the behavior of these parameters (Sadat, 2017). As shown in Figure 2, as the simulation develops the interactions between vehicles are more evident (Yao et al, 2015) it is possible to identify an accumulation of these in front of the entrance to the campus, situation that could be related to the concentration of NO 2 .…”

Section: Resultsmentioning

confidence: 99%

Determining NO2 immission levels in a conflicted area: Riobamba, Ecuador

Paredes

Auqui

Idrovo

et al. 2019

srees

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Riobamba has areas with high vehicular influence. For the determination of nitrogen dioxide concentrations, passive samplers were used, which were placed at points throughout the domain. The concentrations obtained in the field were interpolated with the information generated with the model traffic emissions software, estimating the relationship between vehicular traffic and the presence of gas. Allow to know the amount of pollutants that breathe about 250 pedestrians on average in the area.

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Comparison of NOx emissions from China III and China IV in-use diesel trucks based on on-road measurements

Cited by 54 publications

References 21 publications

Characterization of Real-World Pollutant Emissions and Fuel Consumption of Heavy-Duty Diesel Trucks with Latest Emissions Control

Characterization of Real-World Pollutant Emissions and Fuel Consumption of Heavy-Duty Diesel Trucks with Latest Emissions Control

Emission characteristics of polycyclic aromatic hydrocarbons and nitro-polycyclic aromatic hydrocarbons from diesel trucks based on on-road measurements

Determining NO2 immission levels in a conflicted area: Riobamba, Ecuador

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