Effect of base oil on the nanostructure and oxidation characteristics of diesel particulate matter

Wang, Yajun; Liang, Xingyu; Wang, Ke; Wang, Yuesen; Dong, Lihui; Shu, Gequn

doi:10.1016/j.applthermaleng.2016.06.131

Cited by 34 publications

(6 citation statements)

References 31 publications

(37 reference statements)

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“…67 Also, at high engine load, more fuel is injected into the combustion chamber and burned during the diffusion mode of combustion. 49 These in-cylinder conditions promote the nucleation and surface growth of soot particles and suppress soot oxidation, and hence the primary particle diameter increases. The increasing trend in primary particle diameter with increasing engine load is in accordance with the literature.…”

Section: Resultsmentioning

confidence: 99%

“…The postprocessing of TEM images was performed using an in-house developed image processing code on the basis of the literature. , While the identification of soot agglomerates is easy, the real task is to identify individual soot primary particles. Parameters such as primary particle diameter ( d p ), number of particles in a soot agglomerate ( n ), and two-dimensional radius of gyration ( R g ) were used to compute the fractal dimension. ,− For each fuel blend/engine operating mode, approximately 3000 primary particles were identified for statistical analysis for morphology characteristics.…”

Section: Methodsmentioning

confidence: 99%

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Experimental Analysis of the Morphology and Nanostructure of Soot Particles for Butanol/Diesel Blends at Different Engine Operating Modes

et al. 2019

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In order to comply with strict emission standards, a reduction in diesel particle matter emissions can be addressed by minimizing particle formation and by optimizing particle oxidation in the combustion chamber and in the exhaust and diesel particulate filter systems. The characterization of soot morphology and nanostructure is necessary to understand the soot formation and oxidation processes. Furthermore, understanding these characteristics is important because they affect the aerodynamic behavior of diesel particulate matter in the exhaust system, diesel particulate filter systems, and the environment. This study aims to investigate the influence of fuel oxygen content and engine operating modes on the morphology and nanostructure of soot particles. The oxygen content in the fuel was varied from 0% to 4.32% and 6.48% by using diesel and 20 and 30% butanol blends (by volume) with diesel. As the oxygen content increased, corresponding nanostructure characteristics fringe length and separation distance increased and fringe tortuosity decreased. Changes to the nanostructure properties will have an influence on the operation of diesel particle filters, particularly during the regeneration processes. However, other characteristics such as the influence of these fuels on particle mass and number emissions, performance parameters, and gaseous emissions will also have a significant influence on implementing these fuels in modern diesel vehicles.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Experimental Analysis of the Morphology and Nanostructure of Soot Particles for Butanol/Diesel Blends at Different Engine Operating Modes

et al. 2019

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“…For nanostructural analysis of soot particles around 20 images per sample were obtained at high magnification from 500k upto 600k times. Based on the algorithms reported in the literature [15][16][17] a MATLAB-based code was developed for post processing of the TEM images. A detailed analysis of the morphology and nanostructure of the soot particles has been explained in another paper [18].…”

Section: Transmission Electron Microscopy and Image Postprocessingmentioning

confidence: 99%

Structural characterisation of soot particles for cold-start and hot-start operation of a diesel engine

Arora¹,

Lodi²,

Verma³

et al. 2020

Australasian Fluid Mechanics Conference (AFMC)

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The current study investigates the morphology and nanostructure of soot particles during cold and hot-start operation of a custom designed drive cycle for a heavy-duty diesel engine. The drive cycle consists of eight repeated sets of 120 seconds each, with abrupt change in the load at 30 second intervals at a constant engine speed (1500 and 2000 rpm). After each segment there is an engine stop period of 60 seconds. Soot samples were collected on TEM grids for the first three consecutive sets (cold-start) and the last three consecutive sets (hot-start). The soot samples were analysed using transmission electron microscope. An in-house automated image processing methodology was used for the quantification of a range of characterisation parameters. The results show that the primary particle size during cold-start is smaller in comparison with hotstart operation. High fractal dimension of soot aggregate for cold-start operation would mean more compact structure of soot particles. Shorter fringes with a higher fringe separation distance for cold-start would mean lower graphitisation of soot particles.

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“…24,25 Initially, it was reported that PM mainly contains dry soot, SOF, sulfates, ash, and moisture. 26 Similarly, Mohankumar et al 27 proposed that PM could be divided into a soluble and insoluble organic fraction, and soot accounts for the major proportion. Liati et al 28,29 analyzed the ash chemical composition, which consisted mainly of Ca, Mg, P, Zn, S, O and minor amounts of Fe, Al and Si.…”

Section: Introductionmentioning

confidence: 99%

Thermogravimetric analysis of soot combustion in the presence of ash and soluble organic fraction

et al. 2020

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Effect of base oil on the nanostructure and oxidation characteristics of diesel particulate matter

Cited by 34 publications

References 31 publications

Experimental Analysis of the Morphology and Nanostructure of Soot Particles for Butanol/Diesel Blends at Different Engine Operating Modes

Experimental Analysis of the Morphology and Nanostructure of Soot Particles for Butanol/Diesel Blends at Different Engine Operating Modes

Structural characterisation of soot particles for cold-start and hot-start operation of a diesel engine

Thermogravimetric analysis of soot combustion in the presence of ash and soluble organic fraction

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