| Summary: | The classification of the factors influencing change of fuel quality at storage is presented. Interrelation of the physical and chemical processes proceeding at storage of fuel in steel tanks is established. Tank vapor and water recovery with use of vortex devices, inexpensive and simple on a designs is offered to reduce qualitative and quantitative storage loss. The scheme of equipment for prevention of fuel flooding and evaporation losses decrease is presented. The unit makes possible reducing emission of oil products vapors in the atmosphere by 85 percent. Applying of multifunctional additives for increase of motor fuels stability at storage is offered. Requirements to structure of multifunctional additives for diesel fuel are formulated. The structure 2,2 ‘-dihydroxyazo-compounds conforms completely to these requirements. Their protective effect makes more than 60 percent, the speed of oxidizing processes decreases by 2-3 times, the speed of sediments accumulation decreases by 9 times. Applying of the ester composition synthesized from renewable raw materials to improve diesel fuel quality is offered. The ester composition has the best ecological characteristics in comparison both with oil, and with biodiesel fuel. At its applying exhaust opacity decreases by 45 percent, the CO content in exhaust gases - by 35 percent, but unburned hydrocarbons - by 25 percent. Because of ester composition evaporation losses at storage are 2,5 times less, than at oil fuel storage.
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