MEMBRANE PURIFICATION OF WATERED FUEL

A promising way to solve the problem of waterlogging of motor fuel may be the use of modern filter materials. Membrane filters are widely used in various technological processes. They are capable of working for a long time, are quite durable and chemically resistant. The possibility of using membrane materials in the purification of artificially watered diesel fuel has been investigated. For the analysis of membranes, an installation has been designed that allows fuel to be pumped through the test material at different pressures. The pressure is created without using a pump, but due to compressed air from the compressor unit. As a filter material, Vladipor flat synthetic membranes of the MFFK-3, MFFK3G brands and watered diesel fuel with a water content of 0.5%, 1%, 3% and 5% were used (the volume of the initial fuel sample was 1 liter). The water content in the initial diesel fuel was calculated according to the Dean-Stark method. It was found that with increasing pressure, the degree of purification of the watered fuel by the hydrophobic membrane MFFK-3 increases (improves by 45-70%), in the case of the hydrophilic membrane MFFK-3G decreases (10-14%). The hydrophobic membrane with minimal water content (0.5%) allowed to reduce the water content in the initial fuel sample from 5 ml to 0.25 ml (by 95%), hydrophilic from 5 ml to 4.25 ml (by 15%). The water residue in the permeate after the hydrophilic membrane is significantly higher. The studied membranes of the MFFK-3 and MFFK-3G brands are capable of purifying diesel fuel from water when used as a fine filter.