Diffusion charging measurements on exhaust solid particle number and lung deposited surface area of compressed natural gas and diesel buses

Eisazadeh, Hessam; Ehteram, Mohammad Ali; Khazaee, Iman

doi:10.1007/s11356-020-08266-6

Cited by 7 publications

(4 citation statements)

References 49 publications

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“…Vehicles that have engines that use unfiltered natural gas as fuel, are equipped with diesel particle filters (DPFs) having 50 times lower emission in terms of particle number (PN) than those of diesel engines without DPFs, for the same vehicle type and active use. Portable Emissions Measurement Systems (PEMS) are the typically used method for determination of Real-Driving Emissions (RDE) of vehicles and its variability [22]. Particle number limits (PN) are thresholder for emissions of engine exhausts that use gasoline and natural gas, demanding the use of necessary filters [23].…”

Section: Figure 1 -Air Filtration Systems In An Hdv Cabin and Pollutantsmentioning

confidence: 99%

“…Aging of filters is an important aspect to be addressed in respect to the application of filters in vehicles and eventual plugging. For tests concerning the influence of filter aging NO2 gas is used [18,22]. In order to understand the mechanism of adsorption, artificial filter aging methods are applied, to simulate aging, diesel exhaust gas and ambient air.…”

Section: The Filter Standards and Aging Monitoringmentioning

confidence: 99%

See 1 more Smart Citation

Sustainability challenge on pollution and air quality inside heavy-duty vehicle cabins

Dimić-Mišić¹,

Brkić²,

Imani³

et al. 2022

Tehnika

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Air quality in transportation vehicle cabins is becoming a major concern due to increasing exposure of drivers to harmful gases and aerosol, especially if having in mind that that safety and pollution are positively correlated and adverse events. In order to reduce exposure to air pollution, there is ongoing development of air filters in modern heavy-duty vehicles and increase in protective regulations throughout the world. The aim of this study is to gain insight into extent of pollutants in heavy-duty vehicle cabins, in which drivers spend a large amount of their working (and spare) time, and the necessity for use of air filtration systems. Both experimental results and modelling approach applied in this manuscript reveal the importance of filtration of cabin air, and indicate good correlation between experimental and mathematical results from field measurements conducted in a highly polluted city. Namely, this paper reveals excellent results with the HECA filter which have potential to significantly reduce pollution in the cabin.

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Section: Figure 1 -Air Filtration Systems In An Hdv Cabin and Pollutantsmentioning

confidence: 99%

Section: The Filter Standards and Aging Monitoringmentioning

confidence: 99%

Sustainability challenge on pollution and air quality inside heavy-duty vehicle cabins

Dimić-Mišić¹,

Brkić²,

Imani³

et al. 2022

Tehnika

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show abstract

“…However, despite particle mass (PM) formation is small, the number concentrations of particles emitted by compressed natural gas (CNG) engines are not negligible when compared to those of Diesel engines [31,36,37]. Moreover, it has been pointed out that particles emitted from natural gas engine falls mainly within the ultrafine size range [37][38][39][40][41], highlighting a harmful potential that requires additional research [42,43]. Several studies have reported that particle formation in CNG engines depends upon driving parameters [37,44,45] and fuel composition [31,34,41,46].…”

Section: Introductionmentioning

confidence: 99%

“…Several studies have reported that particle formation in CNG engines depends upon driving parameters [37,44,45] and fuel composition [31,34,41,46]. However, the predominance of ultrafine particles is essentially attributed to lubricant oil [37,38,43,[47][48][49], since it is detectable in the exhaust in the form of metal traces deriving from the additives pack [49,50]. Other recent works have highlighted that CNG engines emit the largest amounts of particles during acceleration, especially after a long idling period [37,[51][52][53][54], and that these peaks are made up entirely by ultrafine particles [52][53][54], suggesting that lubricant oil infusion could be favored in such phases.…”

Section: Introductionmentioning

confidence: 99%

Evolution of Soot Particle Number, Mass and Size Distribution along the Exhaust Line of a Heavy-Duty Engine Fueled with Compressed Natural Gas

et al. 2020

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An experimental study has been conducted to provide a characterization of the transformations that particle size distributions and the number density of soot particles can encounter along the exhaust line of a modern EURO VI compliant heavy-duty engine, fueled with compressed natural gas. Being aware of the particles history in the exhausts can be of utmost importance to understand soot formation and oxidation dynamics, so that, new strategies for further reducing these emissions can be formulated and present and future regulations met. To this purpose, particle samples were collected from several points along the exhaust pipe, namely upstream and downstream of each device the exhaust gases interact with. The engine was turbocharged and equipped with a two-stage after-treatment system. The measurements were carried out in steady conditions while the engine operated in stoichiometric conditions. Particle emissions were measured using a fast-response particle size spectrometer (DMS500) so that size information was analyzed in the range between 5 and 1000 nm. Particle mass information was derived from size distribution data using a correlation available in the literature. The reported results provide more insight on the particle emission process related to natural gas engines and, in particular, point out the effects that the turbine and the after-treatment devices produce on soot particles. Furthermore, the reported observations suggest that soot particles might not derive only from the fuel, namely, external sources, such as lubricant oil, might have a relevant role in soot formation.

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Lung deposited surface area of atmospheric aerosol particles at three observatories in Japan

Kurihara

Iwata

Kiriya

et al. 2021

Atmospheric Environment

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Diffusion charging measurements on exhaust solid particle number and lung deposited surface area of compressed natural gas and diesel buses

Cited by 7 publications

References 49 publications

Sustainability challenge on pollution and air quality inside heavy-duty vehicle cabins

Sustainability challenge on pollution and air quality inside heavy-duty vehicle cabins

Evolution of Soot Particle Number, Mass and Size Distribution along the Exhaust Line of a Heavy-Duty Engine Fueled with Compressed Natural Gas

Lung deposited surface area of atmospheric aerosol particles at three observatories in Japan

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