Use of high-octane additives in gasoline production

Goal. Assessment of the influence of oxygenates on increasing the anti-knock properties of gasoline fractions obtained from different oils, determining the required amount of oxygenates to achieve an octane number of 80, to estimate the cost of commercial gasoline with the addition of oxygenates. Results. 10% and 20% bioadditives were added to straight gasoline. Having analyzed the physicochemical parameters of the gasoline mixture obtained, it can be stated that this type of fuel meets the requirements for gasoline A-80 according to DSTU 7687: 2015. The results of studies have shown that the lowest cost will be in the mixture of straight-run gasoline and bioisobutanol, despite the fact that its content in the mixture is the highest. The advantage of bioisobutanol is also that it will not cause delamination of the mixture, but will act as a homogenizer.However, it is necessary to take into account the DSTU requirement for the amount of oxygen in commercial gasoline, which should not exceed 2.7% (in bioisobutanol, the oxygen content is 21.6%). In this regard, the following recipe was developed for the production of A-80 gasoline for the production of gasoline with OC = 80. The amount of bioisobutanol in the composite mixture should be left in the amount of 4%, MTBE in the amount of 10%. Then the total oxygen content will be within acceptable limits. The reformat content of such a mixture would be at 29%. The use of octanoboosting additives such as isobutanol and MTBE, as well as reformat, increases the octane number of straight-run gasoline, while the cost of gasoline remains competitive. Scientific novelty. The influence of bioadditives on the performance properties of lowoctane gasoline has been established. Practical importance. Given that modern cars require high-octane fuel with anti-knock properties, which are characterized by the experimental octane number of 92.95 and 98. And for cars with gasoline engines with a compression ratio of up to 8, which are present in the fleet of Ukraine, as well as for trucks of the previous Generation, there is a need for gasoline with lower octane. The use of high-octane gasoline in vehicles with a compression ratio of up to 8 is the cause of a number of breakdowns: failure of the piston fingers, crunching of the connecting rod and bearing bearings; cracking of insulation and burning of contacts of spark plugs; combustion of piston bottoms; the burning of the working faces of the exhaust valves and their seats; combustion of gaskets between the head and the cylinder block; burning of piston rings and their increased wear. However, environmental safety and low cost of such gasoline remain one of the priority requirements for gasoline production

oil refining industry; gasoline; bioadditives; performance properties