Abstract
The influence of bioethanol content and parameters of the cavitation field on the quality indicators of motor gasolines: volatility and octane number is studied. Studying the effect of bioethanol and cavitation treatment of bioethanol-gasoline mixture will make it possible to produce automotive fuels for different climatic zones, or winter (summer) versions of gasolines. The use of bioethanol and cavitation treatment of a bioethanol-gasoline mixture affect the fractional composition of motor gasoline and its volatility. The optimal content of the biocomponent, at which there is an increase in the volatility of gasoline, is established Also the results of the octane number change are presented depending on the intensity of cavitation treatment for gas condensate with the addition of bioethanol. The influence of bioethanol content on the increase in octane number during cavitation treatment is determined. It is found that the introduction of bioethanol into the composition of gasoline leads to an improvement in its volatility. In this case, cavitation treatment makes it possible to obtain a mixture resistant to delamination. The addition of bioethanol leads to an adequate increase in light fractions during mechanical mixing and to a change in the fractional composition of the bioethanol-gasoline mixture during cavitation treatment. The addition of bioethanol in amounts up to 10% leads to a decrease in the saturated vapor pressure during cavitation treatment of bioethanol-gasoline mixtures, and an increase in the bioethanol content up to 20% leads to an increase in the saturated vapor pressure, which is explained by a change in the chemical composition of fuel components in comparison with the mechanical method of preparing mixtures. By cavitation treatment it is possible to change the fractional composition, the pressure of saturated vapors and the volatility of bioethanol-gasoline mixtures, making cavitation a promising energy-saving process for the production of gasoline for various climatic conditions
Highlights
The composition of motor gasolines and their compliance with the EURO-3 (4.5) standards is established by DSTU 7687:2015
The introduction of bioethanol into the composition of gasoline leads to an improvement in its volatility
The laboratory unit for cavitation treatment of gasoline mixtures has been modernized to study the effect of the intensity and number of cavitation cycles on the fractional composition and volatility, which will allow choosing the optimal parameters to achieve the specified quality indicators of gasoline with minimal energy consumption
Summary
The composition of motor gasolines and their compliance with the EURO-3 (4.5) standards is established by DSTU 7687:2015. It is shown that in a cavitation field, hydrogen peroxide decomposes into hydroxyl radicals, which subsequently take part in the synthesis of methanol In such a reactor it is possible to obtain a homogeneous liquid from gasoline and bioethanol, and to carry out chemical transformations of gasoline [9]. In [11], the effect of hydrogen peroxide in a cavitation field on the process of converting linear alkanes into high-octane components of motor fuels, including methanol, was studied. The study of the influence of the cavitation process on such important characteristics of a bioethanol-gasoline mixture as fractional composition and volatility will make it possible in the future to develop the foundations of the technology for the production of motor gasolines with different volatility indicators for different climatic conditions.
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