Improving the antioxidant and anticorrosion properties of vegetable oils

Kuliev, R. Sh.; Kuliev, F. A.; Mutalibova, A. A.; Kulieva, S. R.

doi:10.1007/s10553-006-0029-8

Cited by 8 publications

(3 citation statements)

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“…These are derived from renewable resources and are low-cost alternatives to synthetic fluids . At present, their use is limited in the area of total loss applications and those with very low thermal stress ,, . Other industrial application of vegetable-oil-based lubricants is biodegradable hydraulic fluids for use in environmentally sensitive areas (excavators, earthmoving equipment, tractors, agricultural, forestry, and fresh water) .…”

Section: Introductionmentioning

confidence: 99%

Lubricant Base Stock Potential of Chemically Modified Vegetable Oils

Erhan

Sharma

Liu

et al. 2008

J. Agric. Food Chem.

194

122

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The environment must be protected against pollution caused by lubricants based on petroleum oils. The pollution problem is so severe that approximately 50% of all lubricants sold worldwide end up in the environment via volatility, spills, or total loss applications. This threat to the environment can be avoided by either preventing undesirable losses, reclaiming and recycling mineral oil lubricants, or using environmentally friendly lubricants. Vegetable oils are recognized as rapidly biodegradable and are thus promising candidates as base fluids in environment friendly lubricants. Lubricants based on vegetable oils display excellent tribological properties, high viscosity indices, and flash points. To compete with mineral-oil-based lubricants, some of their inherent disadvantages, such as poor oxidation and low-temperature stability, must be corrected. One way to address these problems is chemical modification of vegetable oils at the sites of unsaturation. After a one-step chemical modification, the chemically modified soybean oil derivatives were studied for thermo-oxidative stability using pressurized differential scanning calorimetry and a thin-film micro-oxidation test, low-temperature fluid properties using pour-point measurements, and friction-wear properties using four-ball and ball-on-disk configurations. The lubricants formulated with chemically modified soybean oil derivatives exhibit superior low-temperature flow properties, improved thermo-oxidative stability, and better friction and wear properties. The chemically modified soybean oil derivatives having diester substitution at the sites of unsaturation have potential in the formulation of industrial lubricants.

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Section: Introductionmentioning

confidence: 99%

Lubricant Base Stock Potential of Chemically Modified Vegetable Oils

Erhan

Sharma

Liu

et al. 2008

J. Agric. Food Chem.

194

122

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“…In any case, the use of RO as an industrial lubricant is limited due to poor thermooxidation, which is related to the presence of bis-allylic protons, and could be resulting from increase of oil viscosity and acid content, and therefore will promote corrosion of metal parts . In the case of vegetable oils it is an important parameter to find out the long-term durability of fuel injection equipment, because vegetable oils contain unsaturated acids and are easily oxidized during use, in such a way causing corrosion . Corrosion could be promoted also by different variable properties related to RO obtaining conditions.…”

Section: Selected Physicochemical Properties Of Rapeseed Oilmentioning

confidence: 99%

“…31 In the case of vegetable oils it is an important parameter to find out the long-term durability of fuel injection equipment, because vegetable oils contain unsaturated acids and are easily oxidized during use, in such a way causing corrosion. 32 Corrosion could be promoted also by different variable properties related to RO obtaining conditions. For example, different ash constituents are harmful for the engine and can increase wear, but water content in the long term causes cavitation events in the combustion chamber.…”

Section: ■ Introductionmentioning

confidence: 99%

Selected Physicochemical Properties of Diethyl Ether/Rapeseed Oil Blends and Their Impact on Diesel Engine Smoke Opacity

Górski

Šmigins

2018

Energy Fuels

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In this paper, selected physicochemical properties such as kinematic viscosity (ν), density (ρ), lower heating value (LHV), cold filter plugging point (CFPP), miscibility, flash point (FP), coefficient of friction (μ), lubricity (WS1.4), surface tension (σ), and copper strip corrosion (CSC) of diethyl ether/rapeseed oil blends were experimentally determined. Diethyl ether (DEE) was blended with rapeseed oil (RO) in volumetric ratios of 10, 20, 30, and 40%. The values of the LHV, kinematic viscosity, surface tension, and density of the blends were lower than the values obtained for the tested rapeseed oil. Especially, it was found that DEE has significant influence on the rapeseed oil viscosity value. The addition of merely 10% DEE to rapeseed oil decreased its viscosity by 50%. It was shown that the lubricity of all tested blends is reduced, but not as significantly as viscosity. Also, we confirmed that tested blends do not promote the corrosion processes. What is more, it was found that the temperature of the CFPP decreased when DEE was added to RO and the miscibility of all tested fuel blends is excellent in a wide range of temperature changes. For this reason the results of our research suggest that DEE/RO blends seem to be usable for engines operated in the winter season. However, it should be confirmed in further engine research carried out in low temperature conditions. In this study the diesel smoke opacity (SO) was also measured in the condition of a free acceleration test according to requirements of the United Nations Economic Commission for Europe (ECE) Regulation No. 24. Results of these tests demonstrate that the diesel smoke opacity is reduced even by 55% for DEE40 blend compared with RO.

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