The article considers and presents the classification methods of identifying and assessing petroleum biological contamination and techniques in maintaining biological stability of hydrocarbon fuel. The article focuses on analysis, arrangement and classification of the methods for identifying petroleum biological contamination and maintaining microbiological stability of hydrocarbon fuels.
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
Article considering interconnection of fuel quality for transport and ecological safety. Main directions were offered of solving ecological-energy problem system “human-environment-fuel-transport”.
Abstract. The paper deals with the interrelation between evaporation losses and automobile petrol quality and presents the results of research on modern petrol. It has been established that evaporation leads to an increase in heavy hydrocarbon concentration in petrol composition adversely affecting its quality and operational properties at the excess of permissible concentration.
Iraq is one of the richest oil-and-gas bearing countries in world. During some decades its oil-processing and petrochemical industries have been dynamically developed together with industry of other countries-members of OPEC. Oil in Kirkuk Crude and Basrah Crude is one of the best in Iraq in content of paraffin, naphthenic hydrocarbons and general sulphur. As investigation objects there were selected five examples of oils from different regions of country: Buzyrgan, Rumaila, Nahran-Omar, Kirkuk and Majnun.
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