scholarly journals Thermoadsorption Demetallization of Heavy Oil Residues

2020 ◽  
Vol 22 (4) ◽  
pp. 269
Author(s):  
Ye.K. Ongarbayev
Keyword(s):  
Heavy Oil ◽  
Maximum Degree ◽  
Kaolin Clay ◽  
Vacuum Residue ◽  
Petrochemical Plant ◽  
Heavy Oil Residues ◽  
Improved Performance ◽  
Negative Impacts ◽  
Adsorption Processing ◽  
Sulfur Containing

The high content of metal- and sulfur-containing compounds in the composition of heavy oil residues leads to negative impacts during their processing, the use of catalysts and equipment. To solve this problem, various methods of demetallization and deasphalting are proposed. The article provides information on various methods of demetallization, desulfurization and coking of heavy oil residues. The disadvantages of the considered methods are shown, and a thermal adsorption processing method is proposed as an effective method of demetallization and desulfurization. The results of demetallization and desulfurization of vacuum residue from the Pavlodar Petrochemical Plant (Kazakhstan) using various adsorbents: serpentine, zeolite modified with wollastonite and coke, kaolin clay with coke are presented. The maximum degree of demetallization of 81‒94% with respect to vanadium and nickel is observed when using kaolin clay modified with coke as an adsorbent and during the process at 400 °C for 4 h. The maximum degree of desulfurization 39.6% is observed during the process using zeolite modified with wollastonite and coke at 400 °C for 3 h. After demetallization and desulfurization, the vacuum residue was subjected to a coking process to produce coke with improved performance and yield. Coke with good yield (32%) and low values of ash and mass fraction of total moisture is obtained by vacuum residue coking after demetallization with kaolin clay modified with coke.

scholarly journals Influence of Asphaltenes on the Low-Sulphur Residual Marine Fuels’ Stability

2021 ◽  
Vol 9 (11) ◽  
pp. 1235
Author(s):  
Ksenia I. Smyshlyaeva ◽  
Viacheslav A. Rudko ◽  
Vladimir G. Povarov ◽  
Alina A. Shaidulina ◽  
Ignaty Efimov ◽  
...  
Keyword(s):  
Phase Diagrams ◽  
Elemental Composition ◽  
Heavy Oil ◽  
Ternary Phase ◽  
Vacuum Residue ◽  
Gas Oil ◽  
Sedimentation Stability ◽  
Marine Fuel ◽  
Ternary Phase Diagrams ◽  
Heavy Oil Residues

The effects of asphaltenes from two heavy oil residues on the sedimentation stability of residual marine fuels were assessed and compared. As base components of residual marine fuels, the vacuum residue (VacRes) and visbreaking residue (VisRes) were taken. The heptane-insoluble fractions (HI-fractions), including asphaltenes, isolated from vacuum residue and visbreaking residue, were analyzed to determine the elemental composition (XRF) and cluster parameters (XRD). The results of the analysis of the parameters of the asphaltene cluster (HI-fraction) for vacuum residue and visbreaking residue showed that dγ – 6.1 and 5.9 Å, Lc – 26.72 and 20.78 Å, and La – 7.68 and 7.20 Å. The sedimentation stability of residual marine fuel was determined according to the ISO 10307-1-2009 (TSA) method and described using ternary phase diagrams. The ratio of stable compositions to the total number of possible compositions (with a step of 10 wt%) was 65/66 or 98.5% for residual marine fuel comprising a mixture VacRes/ULSD/LCGO (vacuum residue/ultra-low sulphur diesel/light catalytic gas oil). Meanwhile, the ratio of stable compositions to the total number of possible compositions was 38/66 or 57.6% for residual marine fuel comprising a mixture VisRes/ULSD/LCGO (visbreaking residue/ultra-low sulphur diesel/light catalytic gas oil).

scholarly journals Production of High Purity Biosurfactants Using Heavy Oil Residues as Carbon Source

Energies ◽  
2021 ◽  
Vol 14 (12) ◽  
pp. 3557
Author(s):  
Athina Mandalenaki ◽  
Nicolas Kalogerakis ◽  
Eleftheria Antoniou
Keyword(s):  
Carbon Source ◽  
Heavy Oil ◽  
Oil Pollution ◽  
Batch Reactor ◽  
Production Method ◽  
Promising Alternative ◽  
Heavy Oil Residues ◽  
Oil Residue ◽  
Increasing Demand ◽  
Heavy Oil Residue

Typically, oil pollution cleanup procedures following first response actions include dispersion. Crude oil is biodegradable, and its bioavailability can be increased when dispersed into very fine droplets by means of chemical surfactants. Although their use is widely spread in many applications, the latter may prove toxic, depending on the extent of use. The use of biological means, such as bioremediation and biosurfactants, has emerged over the past years as a very promising ‘green’ alternative technology. Biosurfactants (BSs) are amphiphilic molecules produced by microorganisms during biodegradation, thus increasing the bioavailability of the organic pollutants. It is their biodegradability and low toxicity that render BSs as a very promising alternative to the synthetic ones. Alcanivorax borkumensis SK2 strain ability to produce BSs, without any impurities from the substrate, was investigated. The biosurfactant production was scaled up by means of a sequencing batch reactor (SBR) and a heavy oil residue substrate as the carbon source. The product is free from substrate impurities, and its efficiency is tested on oil bioremediation in the marine environment. The product’s dispersion efficiency was determined by the baffled flask test. The production method proposed can have a significant impact to the market, given the ever-increasing demand for ecologically friendly, reliable, commercially viable and economically competitive environmental cleanup techniques.

New Developments in Deep Hydroconversion of Heavy Oil Residues with Dispersed Catalysts. 2. Kinetic Aspects of Reaction

1994 ◽  
Vol 8 (3) ◽  
pp. 593-597 ◽  
Author(s):  
A. Del Bianco ◽  
N. Panariti ◽  
S. Di Carlo ◽  
P. L. Beltrame ◽  
P. Carniti
Keyword(s):  
Heavy Oil ◽  
New Developments ◽  
Dispersed Catalysts ◽  
Heavy Oil Residues

scholarly journals Theoretical Insights into the Catalytic Effect of Transition-Metal Ions on the Aquathermal Degradation of Sulfur-Containing Heavy Oil: A DFT Study of Cyclohexyl Phenyl Sulfide Cleavage

ACS Omega ◽  
2020 ◽  
Vol 5 (31) ◽  
pp. 19589-19597
Author(s):  
Ilya Tverdov ◽  
Nail R. Khafizov ◽  
Timur I. Madzhidov ◽  
Mikhail A. Varfolomeev ◽  
Chengdong Yuan ◽  
...  
Keyword(s):  
Transition Metal ◽  
Metal Ions ◽  
Heavy Oil ◽  
Catalytic Effect ◽  
Transition Metal Ions ◽  
Dft Study ◽  
Phenyl Sulfide ◽  
Sulfur Containing

Preparation of graphene hollow spheres from vacuum residue of ultra-heavy oil as an effective oxygen electrode for Li–O2 batteries

2018 ◽  
Vol 6 (9) ◽  
pp. 4040-4047 ◽  
Author(s):  
K. H. Lim ◽  
S. Kim ◽  
H. Kweon ◽  
S. Moon ◽  
C.-H. Lee ◽  
...  
Keyword(s):  
Energy Storage ◽  
Heavy Oil ◽  
Hollow Spheres ◽  
Oxygen Electrode ◽  
Vacuum Residue ◽  
Storage Material ◽  
Energy Storage Material

Low-valued vacuum residue was converted into 3D hollow graphene spheres as a promising energy storage material for Li–O2 batteries.

Mechanisms of hydrocracking of heavy oil residues

2009 ◽  
Vol 45 (4) ◽  
pp. 249-253
Author(s):  
Kh. I. Abad-zade ◽  
F. M. Velieva ◽  
G. S. Mukhtarova ◽  
Kh. G. Gadirov
Keyword(s):  
Heavy Oil ◽  
Heavy Oil Residues

New Developments in Deep Hydroconversion of Heavy Oil Residues with Dispersed Catalysts. 1. Effect of Metals and Experimental Conditions

1994 ◽  
Vol 8 (3) ◽  
pp. 588-592 ◽  
Author(s):  
Bernard Fixari ◽  
Sylvie Peureux ◽  
Jeanne Elmouchnino ◽  
Pierre Le Perchec ◽  
Michel Vrinat ◽  
...  
Keyword(s):  
Heavy Oil ◽  
Experimental Conditions ◽  
New Developments ◽  
Dispersed Catalysts ◽  
Heavy Oil Residues
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