LOW-SULPHUR MARINE DIESEL FUELS AND THEIR ANTI-WEAR PROPERTIES: STATE AND PROSPECTS OF THEIR USE

Abstract

The aim of the work is to study the methods of regulating the anti-wear properties of diesel fuels, their negative and positive impact on the reliability of marine diesel fuel equipment. This goal is achieved by clarifying the content of the main methods for regulating the anti-wear properties of diesel fuels. The method of adding anti-wear additives to low-sulphur diesel fuels is considered. It is established that the concentration of additives in low-sulphur distillate fuel in the amount of 0.015÷0.02% by weight significantly improves the anti-wear properties of marine diesel fuels. It is emphasised that studies of the impact of adding mineral oil to diesel fuel, which improves the lubricity of the fuel, have not yet been completed. It is proved that the addition of vegetable oil to diesel fuel improves its anti-wear properties. It has been shown that a mixture of vegetable oils in any proportion with petroleum products allows the synthesis of motor fuels with predetermined physical and chemical properties. It is emphasised that the study of the anti-wear properties of blends of traditional diesel fuel and 1, 2, 5, 10 and 20% palm oil methyl esters revealed that the friction force decreases most strongly with an increase in the concentration of biodiesel from 1% to 5%, reaching a minimum at 10% biodiesel content. The most significant result of the study is a critical analysis of the main ways to regulate the anti-wear properties of diesel fuels by adding anti-wear additives, various types of vegetable oils, biofuels, and mineral oil in certain proportions to diesel fuel. Further work is to conduct studies to identify the impact of different types of diesel fuels on the wear rate of precision pairs of fuel equipment of marine diesel engines to develop reasonable recommendations aimed at improving their reliability.