Abstract
A linear multivariate regression model for the IR spectra of gasolineare used in the paper. On the basis of a number of test samples (alkylate, reformate, regular, premium), an equation was obtained for calculating the content of aromatic hydrocarbons in gasolines based on the transmission values at wave numbers: 1600, 1500, 870, 810, 750 cm-1. The calculated equation was tested on a series of regular gasolines and by the cross-validation method. The test results showed good values of the correlation coefficient (0,96) and the standard deviation (0,4 and 3,5). The range of the content of aromatic hydrocarbons in the test samples is in the range of 24,9 - 30,5 mass %.
Highlights
One of the most important characteristics of gasoline that determines its environmental safety is the content of aromatic hydrocarbons
Using the above method for determining arenes, we initially considered the simplest linear dependence of the concentration of aromatic hydrocarbons on optical density for various gasolines and gasoline components
The results of the research show that infrared spectroscopy methods make it possible to reliably determine the concentration of aromatic hydrocarbons in gasolines, to determine the parameters of motor gasolines, including their compliance with European standards for the total content of aromatic components, which characterize the environmental safety of fuel
Summary
One of the most important characteristics of gasoline that determines its environmental safety is the content of aromatic hydrocarbons. High-octane gasolines provide a mixture of gasoline fractions from various technological processes of oil refining: gasoline fractions of direct distillation, catalytic cracking, reforming, alkylation, isomerization with the addition of individual high octane components and additives, and their improved performance properties. For example, aromatic hydrocarbons are formed during the reforming of straight-run gasolines, are high-octane components that are specially added to gasolines to improve the performance of the fuel (knock resistance, saturated vapor pressure, fractional composition, chemical stability, etc.). The improvement of gasoline production is aimed at stricter requirements for environmental performance. When the content of arenes in motor fuel doubles, specific emissions of solid particles increase fivefold. Especially benzene, pose the greatest danger to biosphere, are carcinogenic and mutagenic substances that can dissolve in oils and lipids, accumulate in the bone marrow, cause damage to the liver, kidneys, and lead to leukemia
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