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Table 1

Ways of changes in the oil product quality characteristics in their interaction with oil, asphaltene-resin-paraffin deposits, and chemical reagents.

Sq. No. Oil product type The change in the standardized indicators
1 2 3 4
1 Diesel fuel Cetane rating Content of polycyclic aromatic hydrocarbons
Flash point in a closed crucible Content of sulfur
Oxidative stability Temperature of distillation of 95% of fractions
Cold filter plugging point
Cloud point
Pour point
Filterability factor
Content of water-soluble acids and alkalis
2 Gasoline motor fuel Antiknock rating (the octane number by the motor method, the octane number by the research method) The content of sulfur, the volume fraction of benzene, olefinic and aromatic hydrocarbons, alcohols (methanol, ethanol, isopropyl, isobutyl, and tert-butyl), esters
bubble point Saturated vapor pressure
Temperature of distillation of 10% of fractions Acidity
Temperature of distillation of 90% of fractions
End boiling point
Content of water-soluble acids and alkalis
3 Aviation kerosene Net heating value The distillation temperature of 90% and 98% of fractions
Acidity Chilling point
Flash point in a closed crucible Thermal oxidation stability
The volumetric fraction of aromatic hydrocarbons
Content of sulfur
Content of water-soluble acids and alkalis
4 All types of fuels for aviation and automotive equipment (FAAE) After the contact with the residuals of chemical reagents in the stagnant areas of a pipeline that are a mixture of the solvent and the substances contained in the removed asphaltene-resin-paraffin deposits, the quality deterioration by the following indicators is predicted: water content, general contamination, soluble gum content, mass fraction of mercaptan sulfur, 10% residue coking ability, ash content. In addition, when contacting chemical reagents produced on the basis of acids or alkalis, the quality of fuels for aviation and automotive equipment can deteriorate due to the increasing corrosive aggressiveness, as measured by the “copper plate test.”

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