Preparation of needle coke from petroleum by-products

Halim, Humala Paulus; Im, Ji Sun; Lee, Chul Wee

doi:10.5714/cl.2013.14.3.152

Cited by 51 publications

(21 citation statements)

References 40 publications

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“…Also, FCC-DO is used as a feedstock for mesophase pitch to produce a carbon fiber [8,9] and raw material for carbon black [10]. The S compounds in FCC-DO are critical factors in quality control as they can cause puffing in the thermal processes for the production of carbon materials [11,12]. The S compounds in FCC-DO are thus required to be removed to obtain premium carbon materials [6,13].…”

Section: Introductionmentioning

confidence: 99%

Reactivity of sulfur compounds in FCC decant oils for hydrodesulfurization over CoMoS2/Al2O3 catalysts

Kim

Jang

Lee

2021

Korean J. Chem. Eng.

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CoMoS 2 /Al 2 O 3 catalysts prepared by adding citric acid (CA) were synthesized and applied tor hydrodesulfurization (HDS) of fluid-catalytic cracking decant-oils (FCC-DO). The HDS of FCC-DO was carried out in an autoclave batch reactor at 653 K and 9.4 MPa H 2 . The structural properties of the catalysts were characterized by N 2 physisorption, X-ray absorption fine structure spectroscopy (XAFS), and transmission electron microscopy (TEM). The S compounds in FCC-DO have been classified into three groups in terms of the reactivity of HDS. The Co K-edge XANES analysis confirmed the formation of the Co-Mo-S phase with the addition of CA, contributing to better activity in the HDS of FCC-DO.

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Section: Introductionmentioning

confidence: 99%

Reactivity of sulfur compounds in FCC decant oils for hydrodesulfurization over CoMoS2/Al2O3 catalysts

Kim

Jang

Lee

2021

Korean J. Chem. Eng.

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“…Asphaltenes and resin are undesirable because they contain heteroatoms and inhibit the process of mesophase development. Asphaltenes present in petroleum residues are also responsible for the formation of less ordered mosaic structure [20].…”

Section: Sara Analysis Of Petroleum Residuesmentioning

confidence: 99%

Mesophase formation behavior in petroleum residues

Kumar¹,

Srivastava²

2015

Carbon letters

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Mesophase pitch is an important starting material for making a wide spectrum of industrial and advanced carbon products. It is produced by pyrolysis of petroleum residues. In this work, mesophase formation behavior in petroleum residues was studied to prepare environmentally-benign mesophase pitches, and the composition of petroleum residues and its influence on the mesophase formation was investigated. Two petroleum residues, i.e., clarified oil s (CLO-1, CLO-2) obtained from fluid catalytic cracking units of different Indian petroleum refineries, were taken as feed stocks. A third petroleum residue, aromatic extract (AE), was produced by extraction of one of the CLO-1 by using N-methyl pyrrolidone solvent. These petroleum residues were thermally treated at 380°C to examine their mesophase formation behavior. Mesophase pitches produced as a result of thermal treatment were characterized physico-chemically, as well as by instrumental techniques such as Fourier-transform infrared spectroscopy, nuclear magnetic resonance, X-ray diffraction and thermogravimetry/derivative thermogravimetry. Thermal treatment of these petroleum residues led to formation of a liquid-crystalline phase (mesophase). The mesophase formation behavior in the petroleum residues was analyzed by optical microscopy. Mesophase pitch prepared from CLO-2 exhibited the highest mesophase content (53 vol%) as compared to other mesophase pitches prepared from CLO-1 and AE.

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“…Needle coke, as an important carbon material, can be classified into two types, i.e., petroleum-based needle coke [1] with heavy oil as the raw materials, and coal-based needle coke [2] with coal tar, coal pitch, or their fractions as the raw materials. Initially, petroleum-based needle coke occupies the dominant position, while the production of coal-based needle coke is greatly accelerated due to the high price and lightening production of petroleum in the recent years.…”

Section: Introductionmentioning

confidence: 99%

Development of a Novel Shaft Dryer for Coal-Based Green Needle Coke Drying Process

et al. 2019

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Featured Application: The energy efficient and environmentally friendly shaft dryer can be applied for drying green cokes during the needle coke production process. Abstract:The industry of coal-based green needle coke develops rapidly in recent years. The green coke produced by the delayed coking process usually has a moisture content of 10%-25%, which damages the calcining kiln and needle coke quality. A standing dehydration tank is currently used to reduce the moisture content of green coke. However, this process has several weaknesses such as unstable operation, large land area occupation, and low productivity. To solve this issue, a novel drying system with a shaft dryer proposed in this work is suitable for green coke drying. Moreover, the performances of the green coke are investigated to design the proposed shaft dryer. The experimental result shows that the average vertex angle of the pile of green cokes is 109.2 • . The pressure drop of the dryer increases linearly with the green coke bed height, and the green coke with a larger size has a smaller pressure drop. The specific pressure drops are 5714, 5554, 5354, and 5114 Pa/m, with median green coke sizes of 26.85, 29.00, 30.45, and 31.80 mm, respectively. Tooth spacing is another important parameter which influences the mass of green coke leakage. The optimal tooth spacing and rotary speed of the rollers are determined by the required production yield.

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Preparation of needle coke from petroleum by-products

Cited by 51 publications

References 40 publications

Reactivity of sulfur compounds in FCC decant oils for hydrodesulfurization over CoMoS2/Al2O3 catalysts

Reactivity of sulfur compounds in FCC decant oils for hydrodesulfurization over CoMoS2/Al2O3 catalysts

Mesophase formation behavior in petroleum residues

Development of a Novel Shaft Dryer for Coal-Based Green Needle Coke Drying Process

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