Purpose. The proposed method for producing unleaded aviation gasoline makes it possible to obtain a fuel composition of aviation gasoline that meets the requirements of modern standards regarding aviation fuels and at the same time improves the environmental performance of aviation equipment, in particular, reduces emissions of lead compounds into the environment.
Specifications. Main indicators of aviation unleaded gasoline 1. Knock resistance: – motor octane number, not less than 91.0; – octane number according to the experimental method, not less than 95.0. 2. Density at a temperature of 20 °C, kg/m3 742.
Application area. Oil refining industry.
Advantages. The use of a high-octane gasoline component (alkylate) to obtain aviation gasoline compositions allows one to achieve the required quality in terms of fractional composition, saturated vapor pressure and an increase in octane number. Compounding with isooctane and isopentane provides sufficient characteristics of aviation gasoline in terms of fractional composition, crystallization temperature and octane number. Adding a mixture of aromatic hydrocarbons: toluene or benzene or xylene or tetrabutylbenzene can significantly increase the octane number of aviation gasoline and balance its fractional composition. A high-octane lead-free additive is used to increase the octane number of aviation gasoline by 3–5 units compared to the original mixture of gasoline components. Moreover, the additive does not contain tetraethyl lead and, therefore, is not toxic.
Technical and economic effect. The proposed method for producing unleaded aviation gasoline makes it possible to obtain a fuel composition of aviation gasoline that meets the requirements of modern standards regarding aviation fuels and at the same time improves the environmental performance of aviation equipment, in particular, reduces emissions of lead compounds into the environment. As a result of reducing emissions of lead compounds, the total toxicity of engine emissions, reduced to carbon monoxide CO, will decrease by 0.224–1.12 conventional kg/kg of fuel, which will lead to a reduction in socio-economic damage caused by pollution sources by 5.51–27 , 55 UAH/kg of fuel.
Description. The use of a high-octane gasoline component (alkylate) to obtain aviation gasoline compositions allows one to achieve the required quality in terms of fractional composition, saturated vapor pressure and an increase in octane number. Compounding with isooctane and isopentane provides sufficient characteristics of aviation gasoline in terms of fractional composition, crystallization temperature and octane number. Adding a mixture of aromatic hydrocarbons: toluene or benzene or xylene or tetrabutylbenzene can significantly increase the octane number of aviation gasoline and balance its fractional composition. A high-octane lead-free additive is used to increase the octane number of aviation gasoline by 3–5 units compared to the original mixture of gasoline components. Moreover, the additive does not contain tetraethyl lead and, therefore, is not toxic. The proposed method for producing unleaded aviation gasoline is implemented by mechanical mixing.