Alternative fuels from vegetable oils: innovative methods and technologies of production and usage

Kyrychenko, V.I.; Kyrychenko, V.V.; Ribun, Viktoriia; Skladaniuk, M.B.

doi:10.15330/pcss.21.3.552-559

Cited by 4 publications

(1 citation statement)

References 8 publications

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“…Of particular importance is the coverage of the results of the study of the influence of surface activity (SA) of lubricants, in particular the values of dipole moments of base oil molecules, their polarity and polarizability on the processes of their hemisorption and tribochemical reactions [10]. It is shown that the level of polarity and ability to polarize base oils significantly affects a number of surface phenomena in nanolayers of friction metals, primarily the density of dislocations and plastic deformation of surfaces, as well as their deformation hardening and as a consequence on energy and material friction criteria.…”

Section: Problem Analysismentioning

confidence: 99%

Monitoring of friction node surfaces in the context of their physico-chemical interactions with lubricating media of different surface activity

Kyrychenko

Ribun

Nezdorovin

et al. 2021

Phys. Chem. Solid St.

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The article deals with tribochemical influence of the surface activity of biosynthetic oils on the operational efficiency and reliability of lubricated friction nodes under the critical conditions. It is proved that the oil surface activity is caused by the structure and properties of their molecules and interactions with steel surfaces. Evaluating criteria of oil tribochemical activity influence on the steel surface modification has been studied. The significant influence of biooils on the steel surface nanolayer phase transformations, friction and steel wearing is claimed. It has been established that the effect of the steel crystal structure deformation and strengthening its surface depends on activity of composition of lubricant. It is proved that biooils lead to improved friction and wear indicators of lubricated samples. X-structural analysis of the steel surfaces showed that during friction the austenite is destroyed and ferrite is formed. Penetration in the lubricated steel nanolayers shows increasing the ferrite and decreasing the austenite content, that cases reducing the deformation degree of metal crystals, which leads to the strengthening of its surface under the plasticized layer and to decreasing the level of friction and wear due to the formed intersurface servitotribopolymer film, which is stable under critical friction.

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Section: Problem Analysismentioning

confidence: 99%

Monitoring of friction node surfaces in the context of their physico-chemical interactions with lubricating media of different surface activity

Kyrychenko

Ribun

Nezdorovin

et al. 2021

Phys. Chem. Solid St.

Self Cite

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Ensuring the Efficient Operation of Friction Units in the Context of Selecting Functionally High Quality Oils

Kyrychenko¹,

Kyrychenko²,

Nezdorovin³

et al. 2021

Energ. Tech. & Res. Sav.

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The article reflects certain applied aspects of a new direction of energy — biosynthetic energy sources, such as bio-oils obtained from technical oils. In particular, there are considered results of the research of the influence of such a characteristic factor of base oils and, first of all, bio-oils as their surface activity on energy efficiency and reliability of operation of friction units lubricated by them under the conditions of the boundary regime of friction. It is proved that the surface activity of oils as an indicator of their functional quality is due to the peculiarities of the structure and properties of their molecules, the energy fields of which evoke certain tribochemical interactions with triboactivated nano-surfaces of friction steels. Separate provisions for evaluating the effect of the tribochemical activity of oils on the process of modifying the steel surfaces of functioning friction units have been formed. The essence of X-ray examination of the influence of lubricating media on the condition of the steel surface by the method of a sliding X-ray beam, analyzing the surface layers with a depth of 0.5–7 mkm. The effect of significant influence of bio-oils obtained from oils on the phase transformations of the structure and properties of the steel surface during tribe tests of samples on friction and wear is revealed. It is established that the effect of obtaining the crystal structure of steel with surface hardening under the deformed layer depends on the tribochemical activity of the proposed three lubricating compositions, which are characterized by the algorithmic growth of such activity. It is proved that the tribochemical activity of bio-oils (in compositions 2 and 3, estimated by the intensity of phase transformations in the surface layers (the effect of Rebinder PO), leads, in turn, to improved friction and wear of lubricated samples compared to the composition 1 low triboactivity. X-structural surfaces analysis of the samples of steel 45 in the initial state and after testing in the media of each of the compositions showed that in the friction processes there is a destruction of the structure of austenite with the release of α-phase (ferrite). It is shown that the intensity of such modification of steel surfaces is progressively amplified in samples lubricated with compositions in accordance with their increasing triboactivity. It was found that with the penetration into the surface layers of steel (from 0.5 to 7 mkm), lubricated with bio-oils of the samples after their tribometer tests, the amount of ferrite increases and the content of austenite decreases. This reduces the deformability of the structure of metal crystals, which leads to the strengthening of its surface under its plasticized layer, and hence the reduction of friction and wear due to the formed intersurface servito-tribopolymer film, resistant to friction. Bibl. 12, Fig. 5, Tab. 3.

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Systematization and Technical and Economic Analysis of Methods and Technologies Conversion of Technical Oils Into Alternative Fuels (Review)

Kyrychenko

Kyrychenko²,

Nezdorovin

2022

Energ. Tech. & Res. Sav.

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The review presents the materials of a systematic scientific and technical analysis of the results of studying the problem of processing technical vegetable (tv-) oils, in particular rapeseed or soybean oils, into alternative fuels of a new type — biofuels as a reflection of a complex of modern factors of resource and energy saving, effective methods and technologies, ecological production safety and rational use. The information system for analyzing the development of this problem covers certain stages, in particular: a) the period from its formation at the level of research tasks with the development of the first processing method — methanolysis-ethanolysis of tv-oils and the technology of the so-called traditional biofuel production; b) formation of an algorithm for searching for perfect and effective methods of processing tv-oils with the achievement of the current state of the problem; c) comparative technical and economic analysis of traditional and innovative methods. It is noted that in the procedures for the search and development of effective methods for the production of biofuels, it is necessary to rely on the mechanisms of three typical, reversible reactions of transesterification of triacyl-glycerol molecules of tv-oils as esters underlying them, namely: a) alcoholysis of tv-oils with methanol or ethanol — at the heart of the methanolysis-ethanolysis method; b) esterolysis of tv-oils by non-oily, low molecular weight esters, in particular ethyl acetate — the methods of esterolysis are based on; c) acetolysis of tv-oils with acetate acid — the basis of the complex method “acetolysis — acylation of alcohols”. Significant disadvantages and imperfections of traditional methanolysis, which reduce its efficiency and quality of biofuel, are characterized. Their causes and consequences are reasonably considered. It was informed about the method we developed for the first time for the esterolysis of tv-oils with ethyl acetate and the technological foundations of biofuel production by it as a more perfect and efficient alternative to traditional methanolysis. Moreover, some of its shortcomings and their impact on fuel quality are noted. An innovative two-stage method of processing them according to the principle of “glycerolysis-2 — alcoholysis or esterolysis of mono-acyl-glycerols”, alternative to the one-stage methods of alcoholysis and esterolysis of tv-oils has been proposed. Its significant advantages in terms of efficiency and quality of biofuel have been proven. Another innovative two-stage method of processing tv-oils according to the principle of “acetolysis of tv-oils with obtaining a mixture of acid chlorides of high-liquid acids — acylation of ethanol or methanol with acid chlorides” with obtaining high-quality biofuel is described. It is shown that acetolysis of tv-oils should be considered as the basis of a complex method of production from them of any bioproduct of the tv-materials industry. Comparison of indicators of a number of properties of new biofuels obtained by different methods with mineral diesel fuel and composite min-bio-fuel showed the high quality of both biofuel itself and compositions with its addition. Bibl. 24, Fig. 1, Tabl. 4.

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Alternative fuels from vegetable oils: innovative methods and technologies of production and usage

Cited by 4 publications

References 8 publications

Monitoring of friction node surfaces in the context of their physico-chemical interactions with lubricating media of different surface activity

Monitoring of friction node surfaces in the context of their physico-chemical interactions with lubricating media of different surface activity

Ensuring the Efficient Operation of Friction Units in the Context of Selecting Functionally High Quality Oils

Systematization and Technical and Economic Analysis of Methods and Technologies Conversion of Technical Oils Into Alternative Fuels (Review)

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