Physico-chemical properties of high-sulfuric heavy oils from yablunivske deposit

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.

Section: Methodsmentioning

confidence: 99%

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

Yarmola¹,

Topilnytskyy²,

Gunka³

et al. 2022

“…[1][2] Heavy high-viscosity crude oil is a mixture of liquid hydrocarbons, which is characterized by a density of 920-1000 kg/m 3 and a viscosity of 10-100 mPa•s. Heavy oil deposits lie at all depths ranging from 300 m to more than 1500 m 3 . Heavy oils contain a high content of aromatic hydrocarbons, tar-asphaltene substances, and a high concentration of metals and sulfur compounds; they have high values of density and viscosity and increase coke ability.…”

Section: Introductionmentioning

confidence: 99%

“…Heavy oils contain a high content of aromatic hydrocarbons, tar-asphaltene substances, and a high concentration of metals and sulfur compounds; they have high values of density and viscosity and increase coke ability. [3][4][5] As a result, this causes an increase in the production cost, as well as an increase in the transportation cost through existing oil pipelines and complicated oil refining according to classical schemes. 3 The peculiarity of HHO is the presence of a large group of microelements in it, first of all, vanadium, nickel, iron, and sulfur, having a special place.…”

Section: Introductionmentioning

confidence: 99%

“…[3][4][5] As a result, this causes an increase in the production cost, as well as an increase in the transportation cost through existing oil pipelines and complicated oil refining according to classical schemes. 3 The peculiarity of HHO is the presence of a large group of microelements in it, first of all, vanadium, nickel, iron, and sulfur, having a special place. There is also increased radioactivity and low gas content (mostly less than 30 m 3 /t).…”

Section: Introductionmentioning

confidence: 99%

“…Gas dissolved in HHO is "dry", the methane content is about 90 % or more, and the presence of "fatty gas" is typical for conventional oils. 3,4 The volume of heavy oil reserves in the world (Fig. 1) was found to be 434 billion barrels according to the evaluation of the U.S. Geological Survey.…”

Section: Introductionmentioning

confidence: 99%

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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.

High-Viscosity Crude Oil. A Review

Yarmola¹,

Topilnytskyy²,

Romanchuk³

2023

The current problem of the production and processing of heavy high-viscosity oils in Ukraine and the world has been considered. It has been established that the main reserves of heavy high-viscosity crude oils in the world are located in South and North America, in the Middle East, as well as in Ukraine in the eastern regions. An analysis of various classifications of heavy high-viscosity oils, which are used both in Ukraine and in the world, was carried out. The main extraction methods of heavy high-viscosity oils were considered, in particular, quarry, mine, and well extraction methods. An overview of the technological processes of heavy high-viscosity oil processing was carried out.