Study on Rheological Properties of Extra-Heavy Crude Oil from Fields of Ukraine

Global demand for crude oil has grown significantly over the past two decades. However, conventional light crude oil production is declining, and more and more deposits of heavy and waxy oil, including high waxy ones, are being developed, creating new technological challenges at every level of the process, from production to transportation and refining. Among the various problems, the main one is wax deposition. Since the costs of maintenance, repair, and achieving the required low-temperature properties of commercial oil products are very high, solving this problem becomes critical. The paper discusses the existing problems of production, transportation, and refining of waxy crude oil and analyzes the methods of their solution.

Section: Problems Of Flow Assurancementioning

confidence: 99%

Advanced Research on the Production, Transportation and Processing of High Waxy Oil. A Review

Topilnytskyy,

Shyshchak,

Tkachuk

et al. 2024

“…At present, the explored oil reserves of the Yablunovske field are about 50 million tons. 11 According to existing data, the balance of the Ukrainian bitumen market in August 2021 amounted to 190 thousand tons, which is 24 % more than in the same period of the previous year (153.4 thousand tons). 12 The growth of the market was primarily facilitated by an increase in imports, the volume of which amounted to 149.1 thousand tons of road bitumen.…”

Section: Introductionmentioning

confidence: 99%

“…One of the essential properties of modified bitumen is its stability during storage and operation, i.e., the ability to retain its properties over time. 11,[15][16][17][18] So, various modifiers and additives are added to bitumen depending on its specifications. 19 Some of the most common additives are EVA, a polymer, which makes the mix more workable, especially in colder conditions; synthetic wax, that allows the bitumen to be mixed at lower temperatures; and SBS, a thermoplastic rubber which offers tensile strength and strain recovery.…”

Section: Introductionmentioning

confidence: 99%

Production of Distilled Bitumen from High-Viscosity Crude Oils of Ukrainian Fields

Yarmola¹,

Topilnytskyy²,

Gunka³

et al. 2022

Self Cite

The characteristics of initial crudes of Yablunivske field (Poltava, Ukraine) and the properties of blended crudes have been examined to select the ways of their further processing. The crude oils were found to be heavy high-sulfuric oils without light distillates. The possibility of obtaining paving bitumen from blended crudes under study has been considered. Distilled bitumen obtained through distillation of this blend was found to meet the requirements for commercial paving bitumen 100/150. To improve the durability and resistance to aging of resulting bitumen, a polymeric modifier was added. The modifier amount of 3 wt.% was found to be appropriate to improve the operational characteristics of obtained bitumen to those of BMW 60/90 grade.

“…This type of oil is extremely relevant for Ukraine because it is a complex raw material for a number of the national economy sectors though today it is not given enough attention. 3,[13][14][15][16] For example, components of motor fuels and distilled bitumen which are obtained from HHO and properly modified, may be used in various industries, e.g. for road construction.…”

Section: Introductionmentioning

confidence: 99%

Disruption of Yeast Cells Xanthophyllomyces Dendrorhous (Phaffia Rhodozyma) by Vibration Resonant Low-Frequency Cavitator

Stefanyshyn¹,

Hunchak²,

Starchevskyy³

et al. 2023

The goal of the study is to optimize the mode of disruption of the yeast Phaffia rhodozyma KNH 1 by a vibration-resonant low-frequency cavitator (VLC). The destruction of the cell biomass of yeast culture P. rhodozyma strain KNH 1 was carried out in VLC with water cooling, the capacity of 800 W, and resonant frequencies of vibrations of 30 Hz, 35 Hz, 37 Hz, 37.8 Hz, 39 Hz, 50 Hz, and in the presence of nitrogen in the reaction medium. Our data suggest that the yield of processed biomass by the treatment of yeast culture in VLC depends on the culture age and the mode of the treatment. Thus, for the six-day culture, we got the highest yield by its processing in VLC at 35 Hz for 75 min. The highest yield from the five-day culture was obtained after the treatment in VLC for 1 h at 37-37.8 Hz. The lowest yield of the disrupted yeast cells was obtained after 5 h of treatment in VLC at 37.8 Hz. The high level of yeast cell disruption can be used for the preparation of glucans aqueous solutions. Our data show that for such a level of disruption to treat five-day culture of P. rhodozyma in VLC at 37 Hz resonance frequency with nitrogen gas, bubbling through the reaction medium is economically profitable. For the first time, this study demonstrates the established optimal mode of destruction of yeast cells of P. rhodozyma strain KNH1 for the action of the vibration-resonance low-frequency cavitator or VLC. Ana¬lysis of the presented data indicates that the claimed me¬thod is convenient, efficient, and technologically justified.