Browsing by Author "Iakovlieva, Anna"

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Analysis of the environmental properties of the components of traditional and alternative aviation gasoline
(National Aviation University, 2019) Boichenko, Sergii; Shkilniuk, Iryna; Pavliukh, Lesia; Babikova, Kateryna; Iakovlieva, Anna; Vinetskaya, Roza
In this article have been analyzed ecological properties of traditional and alternative aviation gasoline. We determine that with reducing of aromatic hydrocarbons in gasoline, saturated with oxygenates; it is possible to improve the composition of aviation gasoline, thereby reducing the formation of carbon monoxide and hydrocarbons during combustion. With increasing octane number, the concentration of toxic gases in the exhaust decreases, that improves the ecological properties. Using biofuels leads to improve environmental characteristics.
COMPARATIVE ANALYSIS OF STANDARD TESTING METHODS FOR MEASURING FUELS & LUBRICANTS BIODEGRADATION
(Національний авіаційний університет, 2015) Boichenko, Sergii; Vovk, Oksana; Iakovlieva, Anna; Kumeiko, Sofia
Biodegradation in fresh water of materials such as plastics, lubricants, and other chemicals, which might end up in the environment after use, is of great importance. Therefore, certification of bio-based materials that may end up as waste in fresh water, with respect to their biodegradation behavior, is necessary. Standard testing methods for measuring biodegradation in fresh water are described in OECD guidelines, ASTM standards, ISO standards, etc. The most widely used testing methods for evaluating biodegradation of chemicals in aerobic aqueous medium are OECD 301 and OECD 310 for ready, and OECD 302 for inherent biodegradability, respectively. Similarly, the International standards ISO 7827, ISO 9408, ISO 9439, ISO 10707, ISO 10708, and ISO 14593 determine the biodegradability of organic compounds in an aerobic aqueous environment and are equivalent to OECD 301 and OECD 310. Test methods comparable to OECD 302 (inherent biodegradability) were also developed at ISO level (ISO 9887, ISO 9888). The American Standards ASTM D 5271 (plastics) and ASTM D 5864, ASTM D 6139 and ASTM D 6731 (lubricants) address the biodegradability of final products which are soluble, poorly soluble, or insoluble in water. Despite the availability of various testing methods for determining biodegradability in fresh water, further research is necessary for identifying the key factors affecting the accuracy and reproducibility of the results. Moreover, the corresponding specifications to characterize the biodegradability of bio-based complex materials in fresh water need to be further investigated
Development of alternative jet fuels modified with camelina oil bio-additives
(National Aviation University, 2019) Iakovlieva, Anna; Boichenko, Sergii; Lejda, Kazimierz; Kuszewski, Hubert; Vovk, Oksana
This paper is devoted to the development and study of physical-chemical and exploitation properties of new alternative jet fuels modified with camelina oil bio-additives. The current condition of environment is analyzed as well as the impact of aviation industry on the environment. During the study the following physical-chemical properties were investigated: density, viscosity, fractional composition, heat of combustion, lubricity, corrosiveness and freezing point. It was found that properties of bio-additives are significantly different from properties of jet fuels. As a result of the work, the complex comparative characteristic of physical-chemical and exploitation properties and quality parameters of jet fuel, camelina oil bio-additive and blended jet fuel samples, was developed.
Experimental study on antiwear properties for blends of jet fuel with bio-components derived from rapeseed oil
(2015-11) Iakovlieva, Anna; Boichenko, Sergii; Vovk, Oksana; Lejda, Kazimierz; Kuszewski, Hubert; Jakubowski, Miroslaw
Antiwear properties of jet fuel, two kinds of biocomponents derived from rapeseed oil and their mixtures were investigated experimentally. Antiwear properties were estimated by the value of the scuffing load and the limiting load of scuffing applied to the friction pair working in a fuel medium. Biocomponents, mainly rapeseed oil FAME and rapeseed oil FAME modified via vacuum distillation were used during the study. It is found that lubricity of biocomponents is significantly higher comparing to conventional jet fuel. It is explained by the chemical composition of FAME: highly polarity of molecules stipulate their good adsorption at the surface of friction pair. High viscosity of biocomponents due to chemical structure positively influence on their lubricity. Adding biocomponents into jet fuel results in strengthening of boundary film and thus improves antiwear properties of fuel blends. It is determined that FAME modified via vacuum distillation possesses better lubricating ability comparing to standard FAME derived from rapeseed oil. Correlation between viscosity and lubricity of fuel is shown.
IMPROVEMENT OF TECHNOLOGICAL SCHEME OF FATTY ACIDS ETHYL ESTERS PRODUCTION FOR USE AS JET FUELS BIOCOMPONENTS
(2014-11-30) Iakovlieva, Anna; Boichenko, Sergii; Vovk, Oksana; Lejda, Kazimierz; Kuszewski, Hubert
The world tendency in replacement of traditional jet fuels with their alternative analogues is presented. The main technologies of jet biofuels production from plant oils are described. The main requirements to biocomponents used in jet fuels are formed. Chemical composition and properties of biocomponents produced via esterification of plant oils by ethanol were investigated. It was developed a method for physical-chemical properties of biocomponents improvemet. The efficiency of the proposed method is shown.
Influence of antioxidants and antiwear additives on jet fuel properties
(National Aviation University, 2019) Boichenko, Sergii; Golych, Yuri; Iakovlieva, Anna; Shkilniuk, Іryna; Topilnytskyi, Petro; Romanchuk, Victoriia; Babatunde, Olufemi
The article is devoted to the study of antioxidants and antiwear additives influence on reactive fuels. The antioxidants Agidol-1, AO-80 and antiwear Hitec-580 were added to the hydrotreated fuel fraction for air-jet engines in the concentrations recommended by the manufacturer. It was established that the addition of these additives, both individually and in combination, improves the physical and chemical properties of commercial fuel for fuel-jet engines, does not affect it, and its properties meet the requirements of normative documents.
Potential of jet biofuels production and application in Ukraine and Poland
(Inderscience publishers, 2015) Iakovlieva, Anna; Boichenko, Sergii; Vovk, Oksana; Lejda, Kazimierz
he present-day situation in civil aviation is discussed. Taking into account limitation of crude oil resources for jet fuel production and worsening of the ecological situation, the tendency to transition to alternative fuels is presented. The perspectives of Ukraine and Poland in production and application of alternative jet fuels is figured out. Main attention is paid to reveal possibilities of these countries for production of jet biofuels derived from plant oils. The potential of biofuels production from various feedstocks is presented and analysed. The advantages of oil-derived biofuels production and application are discussed.