Methods for modifying needle coke raw materials by introducing additives of various origin (review)

Gabdulkhakov, Renat R.; Rudko, Viacheslav A.; Pyagay, Igor N.

doi:10.1016/j.fuel.2021.122265

Cited by 53 publications

(23 citation statements)

References 88 publications

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“…Chemical oxidation and storage stability under atmospheric conditions of motor gasoline rely on its composition, in terms of the type of each petroleum component, and its quantity in the finished motor fuel. , This also depends upon the origin of crude oil and the kind of petroleum refining processes used to produce gasoline fractions . By and large, it is reported that chemical oxidation and storage stability reduce in accordance with the series of paraffins < naphthenes < dines < olefins < isoolefins.…”

Section: Resultsmentioning

confidence: 99%

Unraveling the Superior Role of Characterizing Methyl Ester of Isohexene as an Innovative High-Octane Gasoline Mixing Component

et al. 2022

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High concentrations of isoolefinic hydrocarbons can adversely affect the physical, chemical, mechanical, and ecological characteristics of gasoline fuels. One of the solutions to reduce olefin contents is the utilization of the methoxylation process. The current paper declares a perspective toward a gasoline-component-first technique, revealing an innovative highoctane additive on the basis of isoolefinic components, like isohexene. The olefin content of isohexene was 94% volumetrically. This affected the chemical oxidation under atmospheric conditions. Several gasoline fuels and experimental facilities that match European and Russian requirements were used to execute the recent work. The objective of the methoxylation process is to enhance the chemical oxidation fuels to raise the portion of aliphatic hydrocarbon isomers, to decrease unwanted olefin content, as well as to generate high-octane motor ethers as gasoline octane boosters. The product can be defined as methyl ester of isohexene (MEIH). Various MEIH blends have been measured with other gasoline octane boosters and refinery products. The results proved that antidetonation properties of MEIH were higher than those of base gasolines, tertiary amyl methyl ether (TAME), and isohexene and approximately equal to that of methyl tertiary butyl ether (MTBE). Additionally, the results of the calculated MEIH mixing octane rating were from 104.3 to 131.5 for the research method and from 87.5 to 120.0 for the motor method. Likewise, the olefin content of MEIH was 74.2% when the methoxylation process was applied for isohexene. The oxygen content of MEIH was 3.3 wt %, with no oxygen content in the sample of isohexene. Those have been done thanks to the utilization of the methoxylation process of isohexene. Finally, MEIH provided an individual perspective as a liquid transportation fuel with merits over isohexene, in terms of antidetonation properties, olefin contents, as well as a distillation characteristic range.

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Section: Resultsmentioning

confidence: 99%

Unraveling the Superior Role of Characterizing Methyl Ester of Isohexene as an Innovative High-Octane Gasoline Mixing Component

et al. 2022

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Section: Discussionmentioning

confidence: 99%

“…Further research will focus on the development of a technology for the joint use of the developed water shut-off composition and emulsion liquid packer, including the determination of the optimal composition and rheological properties [39][40][41][42][43] of the liquid packer. During the third stage, a breaker fluid is injected to destroy the gel in the wellbore (to prevent the formation of "hydraulic gates") and gel formed in oil-saturated intervals [38].…”

Section: Realization Of the Proposed Technology On The Fieldmentioning

confidence: 99%

Technology for Improving the Efficiency of Fractured Reservoir Development Using Gel-Forming Compositions

2021

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Increasing the field development efficiency of fractured reservoirs is a contemporary issue. This paper presents fundamental and exploratory research results in this field using modern high-tech experimental equipment from the “Arctic” Scientific Centre at the Saint Petersburg Mining University. Oil reserves in fractured reservoirs are enormous; however, they are classified as hard-to-recover. The before-mentioned reservoirs require a specific approach when selecting technologies to improve the efficiency of their development. In this paper, as a solution to the problem under discussion, we propose the use of a physicochemical method of developing fractured reservoirs based on the injection of a water shut-off agent to exclude highly permeable water-conducting fractures from the drainage process. This technology makes it possible to effectively include and develop previously undrained reservoir areas by directly controlling their filtration properties with the use of new highly efficient and ecologically safe chemical reagents and process fluids.

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“…Softening point (SP), toluene insoluble (TI), quinoline insoluble (QI), and coking value (CV) were generally recognized as the common index of proximate analysis for coal pitch. The tested method of each index of proximate analysis has been done according to the National Standard of China, which was reported in our previous study 22–24,32 . The proximate analysis of each coal pitches has been presented in Table 1.…”

Section: Methodsmentioning

confidence: 99%

“…The basic physical-chemical properties of coal pitch were one of the key factors for the production of pitchbased carbon materials, which has major influence on the quality of derived carbon materials. [22][23][24][25][26] In our previous study, 27 the coal pitches with the aromatic index (f a ) from .95 to .98 were the promised raw materials to produce high quality needle coke. When the pitches have a lower f a (lower than .95), the pitches could hardly produce needle coke but easier to produce mosaic coke.…”

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confidence: 99%

Differences of the pyrolytic behaviors and pyrolysis products of coal pitch from different sources

Zhang

Fang

Zhu

et al. 2022

Asia-Pacific J Chem Eng

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Coal pitch was recognized as an important raw material to produce artificial carbon/graphite materials. The pyrolytic process was the essential process during the production of artificial carbon/graphite materials, and the pyrolytic behaviors of coal pitch acted a key role on the quality of derived carbon materials. In order to detailed study on the pyrolytic behaviors of coal pitch, four kinds of coal pitches named as medium coal tar pitch (MP, a kind of high‐temperature coal pitch), medium‐low temperature coal pitch (MLP), coal direct liquefaction pitch (CLP), and coal pyrolytic extraction (CPE) were used as raw materials, and FTIR, TG/DTG‐FTIR combined with curve‐fitted method have been used to determine the pyrolysis characteristics of coal pitches. The microstructure of pyrolysis products from different coal pitches has been analyzed by optical microscope, X‐ray diffraction (XRD), Raman spectrum, scanning electron microscope (SEM) and N2‐adsorption and desorption (BET method), respectively. What's more, the micro‐strength and resistance of pyrolytic products have been also investigated in this study. In fact, the CLP has the highest aromaticity, and the content of graphite carbon microcrystalline (IG/IAll), the size of carbon microcrystalline (Lc), the specific area (SBET), the micro‐strength, and resistance of its' pyrolytic products were 13.22%, 1.94 nm, 2.909 m2/g, 65%, and 5.22 Ω, respectively. In other words, the molecular structure of coal pitch has key effects on the pyrolysis characteristics of coal pitch, and the aromaticity of coal pitch also has an significant influence on the carbon crystalline, micro‐strength, and resistance of pyrolytic products. The higher aromaticity of coal pitch always meant for the higher content of graphite carbon crystalline and a lower resistance.

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Methods for modifying needle coke raw materials by introducing additives of various origin (review)

Cited by 53 publications

References 88 publications

Unraveling the Superior Role of Characterizing Methyl Ester of Isohexene as an Innovative High-Octane Gasoline Mixing Component

Unraveling the Superior Role of Characterizing Methyl Ester of Isohexene as an Innovative High-Octane Gasoline Mixing Component

Technology for Improving the Efficiency of Fractured Reservoir Development Using Gel-Forming Compositions

Differences of the pyrolytic behaviors and pyrolysis products of coal pitch from different sources

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