Investigation of the lubrication properties and tribological mechanisms of oxygenated compounds

Abstract

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Synthesis and Characterization of Diesel Lubricity Enhancer through Transesterification Reaction of Palm Oil with 1,2-Ethanediol

“…The more polar the functional group of a lubricity additive compound, the better its lubrication ability. This compound can interact on the metal substrate through its functional groups, so that the more polar the functional group of a compound, the stronger it will be adsorbed on the surface of the metal being lubricated [16].…”

“…The presence of the hydroxy group of this compound is believed can provide better lubricity capabilities thanmethyl ester or ethyl ester products. This is referred to the research conducted by Sukjit [16] where the more polar the functional group of a lubricity additive will increase its lubricity ability, in the following order: COOH > CHO > OH > COOCH3 > C = O > C-O-C [13], [16]. However, there is still no information reported regarding the application of 2-hydroxyethyl ester compounds as additives to increase the lubricity of low sulfur diesel fuel.…”

Evaluation of Lubricating Properties of Diesel Based Fuels Micro Emulsified With Glycerin

“…Sukjit et al 18 Investigated lubrication properties of various oxygenated compounds, carboxylic acid, aldehyde, alcohol, ketone, ester, and ether. The authors used HFRR to measure the lubricity.…”

“…These groups provide better adsorption on the surface and consequently increase the efficiency in the metal coating and improves lubrication capacity, protecting the surfaces 18 …”

“…It is noteworthy that the viscosity measurements of the micro emulsion formulations were performed and the values were around 0.6 cP indicating that the presence of glycerin in the formulation does not promote a significant change in this parameter, thus evidencing that the decrease of the evaporation is that interferes in this behavior. It is also worth noting that the presence of OH groups in glycerin also play an important role in the lubricity improvement 16,18 . The lubricity characteristics for mineral diesel S10 B7 and the formulations developed can be analyzed by observing the size of the scars on the spheres used in the HFRR experiments.…”