Predicting Lubricity of Low Sulfur Diesel Fuel

Wang, Jerry C.; Cusano, C. M.

doi:10.4271/952564

Cited by 17 publications

(6 citation statements)

References 11 publications

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“…hydrodynamic (HDL), elasto-hydrodynamic (EDHL), boundary (BL) and Mixed (ML) lubrication. The fuel guards the metallic parts away from rapid wear by forming HDL films (function of fuel viscosity) or BL films (function of di-aromatic constituents) in between the solid surfaces [6,8].…”

Section: Introductionmentioning

confidence: 99%

“…The inherent lubricity quality of the diesel fuel was in a reserve capacity level prior to the effect of stringent emission standard mandates on diesel fuel sulfur content (Table 1) for the purpose of reducing the environment pollution [4,10]. Indeed, the fuel lubricity is not a function of sulfur content in it [8]. Because, the naturally available trace level complex polar substances (e.g.…”

Section: Introductionmentioning

confidence: 99%

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Lubricity Improvement of the Ultra-low Sulfur Diesel Fuel with the Biodiesel

2015

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Ultra-low sulfur diesel fuel is essential requirement as per the emission regulation. With the adoption of hydrodesulfurization (HDS) process, the diesel fuel loses its inherent lubricity, however certain amount of lubricity of diesel fuel is needed to save several engine components from wear and failure. Though the loss of lubricity of the diesel fuel is observed with the removal of sulfur, it is mainly due to the loss of nitrogen and oxygen based polar trace compounds which are also removed in the HDS process. Unrefined biodiesels having little amount of monoglycerides (<0.8%) and free fatty acids also show better lubricity and fuel properties to be used as fuel lubricant. Biodiesel are also considered as the suitable blending compound with the diesel. This study found that the biodiesel blends up to 20% with the diesel fuel can effectively reduce both the wear of the tribo-contact surfaces as well as the friction coefficient. The use of biodegradable fuel lubricant has set away the threat of environment pollution by the diesel additives which are derived chemically. The oxidation stability and the low temperature properties of both the biodiesel and the vegetable oils can be improved with some chemical modification. It can be concluded that the use of biodiesel with the diesel fuel can be an appropriate option for effective engine lubrication system where only the fuel has to provide the required lubricity.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Lubricity Improvement of the Ultra-low Sulfur Diesel Fuel with the Biodiesel

2015

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“…An earlier study by Wang [17,18] showed that diesel fuel lubricity is dependent on fuel viscosity and aromatic content. As Table 1 indicates, there are significant differences in the viscosity and aromatic levels of the two fuels.…”

Section: Discussionmentioning

confidence: 99%

Effect of Carbon Coating on Scuffing Performance in Diesel Fuels

Ajayi

Alzoubi

Erdemir

et al. 2001

Tribology Transactions

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The & l-has-van Alphen (dI-ivA)signal of the organic superconductor 13''-(BEDlTF)#SFsCHjCF$ 03O3 shows an inverse-sawtooth wave form which proves the existence of an ideal two-tlmensiond (2D) Fermi surface. The dHvA wave shape cartalmost perfectly be describedby a 2D theosy assuming a constantchemicatpotential. TMseither impIiesthe existence of the predictedquasi-one-dimensional band with an exceptionallylarge densi[yof statesor the chemical potentialmaybe pinneddue to locatized states nearthe Fermienergy.Keywords: Organic superconductors. M~gnetic measurements Organic metals of the type {BEDT-TTF)zX, where BEDT-TTF is bkethyletdthio-tetrathiafulvalene and X represents a monovalent anion, are characterized by their pronounced two-dimensional (2D) electronic structure with, often, negligible dispersion perpendicular to the highly conducting planes [1]. Nevertheless. the de Haas-van Aiphen (dHvA) oscillations in most of these high-quality metals exhibit only minor deviations from the conventional 3D Lifshitz-Kosevich (LK) theory [2]. This is in contrast to magnetoresistance oscillations where in a number of organic metals strong apparent deviations of the Shubnikovde Haas (SdH) signal fkom IX behavior have beersreported (see references in [3]). In transportdata, however, complicated scattering mechanisms are involved and a non-trivial tensor inversion is needed to extract the true SdH signaL Here, we report on true thermodynamic dHvA data which provide experimental evidenee for the existence of a perfeet 2D Fermi liquid in a bulk 3D organic metal.The highquaiity $-(BEDT-T'IT9ZSF5CH2CFZS03 single crystals were grown by cketrocrysb]]ization [4]. The magnetization Ml perpendicular to the applied magnetic field B was measured by means of a cmtilever torque magnetome- tory. The torque is given by ? = M x E which is proportional to B2 for an anisotropic field-independent susceptibility x of the sample. In general, x is a tensor and the absolute value of the torque has th$ form r = AXB2sin229, where AZ is the susceptibility difference between two principal axes of the x tensor and r9is the angle between 1? and one of the prittcipal tensor axes. For a 2D Fermi surface the torque dHvA signal is proportional to dFhiQ, with F = FJCOSQand the angie~between B and the normal to the conducting planes. Fig. l(a) shows the torque signal at Q = -0.7" where the dHvA amplitude is very small and any nonlinearities of the torque signal can be excluded. The dHvA oscillations are sitting on a torque background which follows a B2 behavior up to the highest field. This background signal is up to T = 75 K almost temperature independent and shows a sin2fi dependence as expected for a static field-independent susceptibility (Fig. 2). One principal axis of the x tensor lies at @ = 30". The occurrence of this anisotropic susceptibility is rather unusual for the organic metals and the origin of the signa~in the present material is unclear. It might be a remnant of the local magnetism of the molecular bands.At low fields and high temperat...

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“…[1][2][3] Dziegielewski et al 4 concluded that the lubricity of diesel fuels is best when aromatics and nparaffin content is predominant. Wang et al 5 found that some low sulphur fuels can have lubricity as high as some high sulphur fuels, and lubricity is thus likely to be independent of sulphur levels.…”

Section: Introductionmentioning

confidence: 99%

Bio‐diesel lubricity: correlation study with residual acidity

Sarin

Arora

Ranjan

et al. 2007

Lubrication Science

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Bio-diesel has been accepted as a renewable liquid biofuel worldwide. In order to ensure customers' acceptance, standardisation and quality assurance are the key factors to the market introduction of bio-diesel as a transport fuel. Lubricity of bio-diesel is an important issue and it is well reported that 1-2% bio-diesel is sufficient to maintain the lubricity of diesel even of very poor lubricity.However, a wide variation in lubricity performance of bio-diesel from different vegetable oils and sources has been noticed. In addition, on critical examination, it was noticed that the variation in the lubricating performance of bio-diesel could be better linked to its residual acidity than to variation in fatty acid composition. Copyright

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Predicting Lubricity of Low Sulfur Diesel Fuel

Cited by 17 publications

References 11 publications

Lubricity Improvement of the Ultra-low Sulfur Diesel Fuel with the Biodiesel

Lubricity Improvement of the Ultra-low Sulfur Diesel Fuel with the Biodiesel

Effect of Carbon Coating on Scuffing Performance in Diesel Fuels

Bio‐diesel lubricity: correlation study with residual acidity

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