SOF Component of Lubricant Oil on Diesel PM in a High Boosted and Cooled EGR Engine

Osada, Hideaki; Aoyagi, Yoshinobu; Shimada, Kazuaki; Akiyama, K.; Goto, Yuichi; Suzuki, Hisakazu

doi:10.4271/2007-01-0123

Cited by 10 publications

(3 citation statements)

References 9 publications

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“…There are evidences suggesting that nucleation of soluble organic fraction (SOF) is promoted through the turbine [71]. A large share of the SOF is usually related to lubricant oil [46,72,73]; namely, lubricant oil components can represent up to the 80% of the SOF [74]. It is noteworthy that lubricant oil can cause the behavior observed downstream of the turbine in more than one way.…”

Section: Resultsmentioning

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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Section: Resultsmentioning

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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“…However, diesel exhaust gases, such as carbon monoxide (CO), unburned hydrocarbons (HC x ), nitrogen oxides (NO x ), particulate matter (PM) and soluble organic fraction (SOF), are considered major sources of air pollutants [1][2][3]. Among these hazardous pollutants, SOF are the heavy liquid hydrocarbons (C > 16 [4,5], aromatics and oxygenated compounds [6]) adsorbed on soot, which mainly come from unburned fuel and lube oils [7,8]. The content of SOF is known to vary with engine operating conditions and can reach about 5-60% of the whole mass of the particulate matter [6,[9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Sulfur-Resistant TiO2-CeO2 Composite and Its Catalytic Performance in the Oxidation of a Soluble Organic Fraction from Diesel Exhaust

et al. 2018

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Sulfur poisoning is one of the most important factors deteriorating the purification efficiency of diesel exhaust after-treatment system, thus improving the sulfur resistibility of catalysts is imperative. Herein, ceria oxygen storage material was introduced into a sulfur-resistant titania by a co-precipitation method, and the sulfur resistibility and catalytic activity of prepared TiO 2 -CeO 2 composite in the oxidation of diesel soluble organic fraction (SOF) were studied. Catalytic performance testing results show that the CeO 2 modification significantly improves the catalytic SOF purification efficiency of TiO 2 -CeO 2 catalyst. SO 2 uptake and energy-dispersive X-ray (EDX) results suggest that the ceria doping does not debase the excellent sulfur resistibility of bare TiO 2 , the prepared TiO 2 -CeO 2 catalyst exhibits obviously better sulfur resistibility than the CeO 2 and commercial CeO 2 -ZrO 2 -Al 2 O 3 . X-ray powder diffraction (XRD) and Raman spectra indicate that cerium ions can enter into the TiO 2 lattice and not form complete CeO 2 crystals. X-ray photoelectron spectroscopy (XPS), H 2 -temperature programmed reduction (H 2 -TPR) and oxygen storage capacity (OSC) testing results imply that the addition of CeO 2 in TiO 2 -CeO 2 catalyst can significantly enhance the surface oxygen concentration and oxygen storage capacity of TiO 2 -CeO 2 .

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“…For this reason, the influencing factors of particles' formation in engines were investigated many times . Studies on the influence of lubricating oil on particulate matters emission were mainly focused on the soluble organic fraction of particulate matters, and much research was conducted to investigate the particle size distribution of engines . However, few experiments were about the influence of lubricating oil or oil additives on particle size distribution.…”

Section: Introductionmentioning

confidence: 99%

Effect of lubricating oil additives on particle size distribution and total number concentration in diesel engine

Dong

Shu

Liang

et al. 2012

Lubrication Science

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This paper investigates the characteristics of particle size distribution in exhaust gas of engine fuelled with pure diesel and with diesel mixed with base oil or with oil additives. The experiments are conducted on a turbocharged diesel engine with fast particulate spectrometer DMS 500 connected to the exhaust pipe. Base oil and two kinds of commonly used lubricating oil additives, antioxidant additives and antifoaming additives, are chosen to be added into the fuel, with the concentrations being 0.5%, 1.0% and 1.5% of fuel weight individually. The particle size distribution is measured under medium load (100 Nm) and full load at different speeds. The results indicate that the existence of base oil or oil additives shows great influence on particle size distribution. Copyright © 2012 John Wiley & Sons, Ltd.

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SOF Component of Lubricant Oil on Diesel PM in a High Boosted and Cooled EGR Engine

Cited by 10 publications

References 9 publications

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

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

Synthesis of Sulfur-Resistant TiO2-CeO2 Composite and Its Catalytic Performance in the Oxidation of a Soluble Organic Fraction from Diesel Exhaust

Effect of lubricating oil additives on particle size distribution and total number concentration in diesel engine

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