Demetallization and desulfurization of heavy oil residues by adsorbents

Ongarbayev, Yerdos; Oteuli, Shynar; Малдыбаев, Г. К.; Nurzhanova, S. B.

doi:10.1080/10916466.2019.1570257

Cited by 21 publications

(12 citation statements)

References 8 publications

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“…As an example, as much as 71% demetallation percentage was achieved for Lago crude oil using hydrodemetalation process at 739 K using 3.5% CoO and 10% MoO3 catalyst at Al 2 O 3 support. On the other hand, vanadyl-and nickel-porphyrins were successfully removed in 85 and 68%, respectively, from European crude oil at 683 K [71][72]. Unfortunately, some of the drawbacks experienced during hydrodemetallization include large heat and hydrogen gas consumption, which leads to an elevated operational cost.…”

Section: ■ Removal Of Metallic Porphyrins From Crude Oilsmentioning

confidence: 99%

The Origin, Physicochemical Properties, and Removal Technology of Metallic Porphyrins from Crude Oils

et al. 2021

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Crude oil is an indispensable energy feedstock for daily activities, although some amounts of metallic porphyrins components with undesired characteristics have been identified. These constituents are assumed to originate from the geochemical process of chlorophyll and heme derivatives. In addition, their chemical structures have been thoroughly characterized using spectroscopy techniques, while several analytical methods were adopted in the detection and concentration quantification in the crude oils. The metallic porphyrins have several demerits, including the deactivation of used catalysts, contamination of the treated petrochemical products, and corrosion of the industrial equipment. Also, the removal process is considered challenging due to the strong interaction with the asphaltene fraction of crude oil. This review article, therefore, provides brief information on the origin, physicochemical properties, and possible removal technology of metallic porphyrins from crude oil samples. Besides, a better understanding of chemistry contributes a useful insight towards the development and establishment of better futuristic processing technology.

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Section: ■ Removal Of Metallic Porphyrins From Crude Oilsmentioning

confidence: 99%

The Origin, Physicochemical Properties, and Removal Technology of Metallic Porphyrins from Crude Oils

et al. 2021

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“…The process of demetallization and desulfurization of vacuum residue from the Pavlodar Petrochemical Plant was carried out in an enlarged installation with two reactors at different temperatures and times at atmospheric pressure [18]. Vacuum residue is passed in the reactor through a fixed adsorbent bed at a temperature of 300-400 °С, at a feed rate of 1-3 l/h, with an exposure of the feedstock in the reactor 0.5-3.0 h at atmospheric pressure.…”

Section: Experimental Partmentioning

confidence: 99%

“…To increase the yield of coke obtained from the vacuum residue, a method for producing coke with preliminary demetallization and desulfurization of a heavy oil residue using an adsorbent is proposed. Preliminary demetallization and desulfurization of coking raw materials are carried out according to the method presented in the article [18]. In previous works, for the process of demetallization and desulfurization of vacuum residue, we tested adsorbents based on zeolite modified with xerogel of vanadium (V) oxide and titanium compounds [19].…”

Section: Introductionmentioning

confidence: 99%

Thermoadsorption Demetallization of Heavy Oil Residues

Ongarbayev

2020

Eurasian Chem. Tech. J.

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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.

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“…The need for efficient deasphalting and demetallization processes has provided a powerful impetus to research in the fields of asphaltene structure, [1][2][3][4] transformations of their nanoaggregates at various stages of oil refining, [5][6][7][8][9] as well as extraction of valuable transition metals. 10 Review articles 11,12 have critically discussed modern methods of demetallization, including deasphalting of heavy oil feedstock, a process during which a significant part of the metals is removed. The advantages and disadvantages of deasphalting by solvent extraction using light n-alkanes, supercritical CO 2 , and mixtures of CO 2 and various solvents (heptane, toluene, dimethyl carbonate) have been discussed in detail.…”

Section: Introductionmentioning

confidence: 99%

Effect of protective bed composition on deactivation of a hydrotreating catalyst

Yunusov

Teshаbaev

Mirzaeva

et al. 2021

J of Chemical Tech & Biotech

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BACKGROUND:The relationship between the chemical composition, texture, and the shape of the granules of the protective bed upstream hydrotreating, that influences the degree of metal removal from the residual vacuum gas oil, is a critical issue in oil refining. RESULTS:The character of the metal and sulphur distribution on the surface and in the volume of granules of the protective beds was studied for the model mixtures enriched with typical compounds deactivating hydrodesulphurization catalysts. The protective bed was operated along with the demetallization catalyst synthesized using local mineral raw materials (e.g., Angren high-quality enriched kaolin) and production wastes (spent alumina sorbent from Shurtan gas chemical complex).CONCLUSION: It is shown, the use of a two-bed protective system most effectively extended the life-time of the main hydrotreating catalyst. The spent and deactivated Al-Co-Mo catalyst can be efficiently used in the synthesis of the catalyst used for the pre-cleaning upstream hydrotreating.

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Demetallization and desulfurization of heavy oil residues by adsorbents

Cited by 21 publications

References 8 publications

The Origin, Physicochemical Properties, and Removal Technology of Metallic Porphyrins from Crude Oils

The Origin, Physicochemical Properties, and Removal Technology of Metallic Porphyrins from Crude Oils

Thermoadsorption Demetallization of Heavy Oil Residues

Effect of protective bed composition on deactivation of a hydrotreating catalyst

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