Water is an unacceptable admixture in diesel fuel. According to GOST standards its presence in the fuel is not provided. However, the reality is that water and its vapor in the domestic diesel fuel are present. This happens mainly due to the method of hydrotreating of diesel fuel aiming to eliminate sulfur impurities, hygroscopic properties of fuel as well as violations of transportation and storage conditions. Condensation in the tank with diesel fuel can occur in case of not fully loaded capacity. Tank vapor causing condensation of water is concentrating in the remaining empty space.
Bench tests have shown that traces of water in petroleum products in quantities up to 0,025% are acceptable for summer grades of diesel fuel only, while such amount of water impurities for winter grades may lead to the formation of ice crystals and cause substantial damage to the mechanisms of diesel units. In practice, water content exceeds the norm significantly.
Water is considered to be the worst enemy of Diesel. Its presence in diesel fuel can launch the growth of microorganisms and microalgae, which significantly reduce the quality of oil products and can clog filters and pump units. High pressure fuel pumps and fuel injectors suffer from water in diesel internal combustion engines with Common Rail system. Due to the use of low-quality diesel fuel there often occur cases of water hammer piston in diesel engines “atmospheric pressure”.
Current decisions available on the market including diesel fuel fine filters that are being installed on modern vehicles are not fully effective due to the fact that they work mainly with the water separated from the primary emulsion into the sediment and do not work with the water dissolved in the fuel. Also, the surface of these filters is quickly contaminated by mechanical impurities.
Laboratory of filtering materials “E-KO” offers its own accessible industrial solutions on purification of diesel fuel from water at the molecular level, as well as mechanical and bacteriological contaminants at the stages of production, transportation and delivery of petroleum products to the final consumer.