The tribological behavior of essential oils in low sulphur automotive diesel

Arkoudeas, Panagiotis; Zannikos, F.; Lois, E.

doi:10.1016/j.fuel.2008.06.008

Cited by 15 publications

(13 citation statements)

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“…Active sulfur in the fuels is the main antiwear component; however, recently, owing to the demands for environmental protection, the sulfur content of automotive fuels is restricted to 10 ppm, which leads to the malignant wear of some key engine parts including the spray nozzle, injection pump and fuel filter, etc., since these parts are mainly lubricated by the fuels [1]. Therefore, the lubricity of a novel low-sulfur fuel is worth studying.…”

Section: Introductionmentioning

confidence: 99%

Influence of Microalgal Bio-Oil on the Lubrication Properties of Engine Oil

Peng

Zheng

et al. 2015

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

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-In order to accelerate and expand the application of bio-energy, two kinds of microalgal bio-oils, prepared via co-liquefaction of Chlorella and Spirulina under sub-and supercritical ethanol conditions, were used as partial substitutes for the engine oil CD SAE 15W-40. The friction and wear behaviors of the oils were tested on a four-ball tribometer, referring to the ASTM D4172 standard conditions. The micro-morphology, profiles, roughness and chemical valences of typical elements on the rubbed surfaces were characterized by Scanning Electron Microscopy (SEM), surface profiler and X-ray Photoelectron Spectroscopy (XPS), respectively. The results showed that both of the bio-oils had good lubrication properties. The suitable weight content of the bio-oils in the engine oil was 10%. The lubrication properties of the Bio-Oil (BO sup ) prepared in supercritical ethanol were a little better than those of the Bio-Oil (BO sub ) prepared in subcritical ethanol. The lubricating mechanisms were ascribed to the combined actions of various lubricating films, including boundary lubrication, and deposited films and tribological chemical reaction films. The stronger tribological chemical effects of BO sup from higher contents of N-containing compounds contributed to its better lubrication properties than those of BO sub .Résumé -Influence de bio-huiles issues d'algues sur les propriétés de lubrification d'une huile moteur -Afin d'accélérer et d'étendre l'application des bioénergies, deux types de bio-huiles issues d'algues, préparées par co-liquéfaction de Chlorella et Spirulina dans de l'éthanol à l'état sous-et supercritiques, ont été utilisés comme substituts partiels de l'huile moteur CD SAE 15W-40. Les comportements d'usure et de frottement avec ces huiles ont été testés sur un tribomètre à quatre billes, en se référant aux conditions de la norme ASTM D4172. La micromorphologie, les profils et la rugosité de surface ainsi que les valences chimiques des éléments typiques sur les surfaces frottées ont été respectivement caractérisés par une microscopie à balayage électronique (SEM, Scanning Electron Microscopy), par un profilomètre de surface et par spectroscopie photo-électronique des rayons X (XPS, X-ray Photoelectron Spectroscopy). Les résultats ont montré que les bio-huiles avaient toutes deux de bonnes propriétés de lubrification. La teneur en poids adaptée des bio-huiles dans l'huile moteur était de 10 %. Les propriétés de lubrification de la bio-huile (BO sup ) préparée dans de l'éthanol supercritique ont été légèrement meilleures que celles de la bio-huile (BO sub ) préparée dans de l'éthanol sous-critique. Les mécanismes de lubrification ont été attribués aux actions combinées de différents films de lubrification (y compris un graissage à film d'huile, et de films de dépôts) et de films de réaction chimique tribologiques. Les effets tribo-chimiques plus forts de l'huile BO sup contenant des teneurs supérieures en composés contenant de l'azote ont contribué à rendre ses propriétés de lubrification supérieur...

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Section: Introductionmentioning

confidence: 99%

Influence of Microalgal Bio-Oil on the Lubrication Properties of Engine Oil

Peng

Zheng

et al. 2015

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

View full text Add to dashboard Cite

show abstract

“…According to pump manufacturers this loss of lubricity may be the difference between fuels from a controlled laboratory environment and a cost-conscious production environment. [1][2][3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

“…Field trials and pump rig durability testing of both Swedish Class 1 and 2 showed that their inherent lubricity was unacceptable [9][10][11][12][13][14][15]. Diesel fuel work has revealed that humidity, which reflects environmental water vapour pressure, can have an important influence on the friction and wear, although this was not taken into account in test work until recently [1][2][3][4][5][6][7][9][10][11][12][13][14][15]. It is possible to eliminate, at least to a large extent, the influence of humidity on test repeatability of friction, wear, and film formation by carefully controlling humidity in a relative narrow range [1][2][3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

“…Diesel fuel work has revealed that humidity, which reflects environmental water vapour pressure, can have an important influence on the friction and wear, although this was not taken into account in test work until recently [1][2][3][4][5][6][7][9][10][11][12][13][14][15]. It is possible to eliminate, at least to a large extent, the influence of humidity on test repeatability of friction, wear, and film formation by carefully controlling humidity in a relative narrow range [1][2][3][4][5][6][7]. A survey of low sulphur diesel fuels (sulphur content ranged from 1 to 498 ppm) has showed that in spite of high refinement most low sulphur diesels still contain considerable residual polyaromatics (0.3 to 2.2 %wt) and diaromatics (2 to 11% wt.).…”

Section: Introductionmentioning

confidence: 99%

“…The lubricity mechanism of gasoline is quite different from that of diesel fuels that leads to severe adhesive wear. With low-sulphur fuels, adhesive wear is observed instead of corrosive and mild oxidative wear, and deposits build up on top land [1][2][3][4]. Metallurgy and mechanical properties of test specimens used to study wear have important effects on the lubricating mechanisms of fuels.…”

Section: Introductionmentioning

confidence: 99%

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