Research on Coal Tar Pitch Based Needle Coke Production Quality

The article developed a five-lump kinetic model for delayed coking through needle coke. The kinetic parameters were determined using the experimental results of the genetic algorithm method. The results showed the calculated concentration distribution agreed well with the experimental results. The results of five-lump kinetic model that composed of parallel and serial reactions and their activation energy also showed that the thermal sensitivity of coal tar pitch declined and that the orderly orientation strengthened under external magnetic field. This facilitates the formation of wide mesophase pitch structures in thermal conversion.

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Study of Quinoline Insoluble (QI) Removal for Needle Coke-Grade Coal Tar Pitch by Extraction with Fractionalized Aliphatic Solvents and Coke Formation Thereof

Applied Sciences ◽

10.3390/app11072906 ◽

2021 ◽

Vol 11 (7) ◽

pp. 2906

Author(s):

Jung-Chul An ◽

Seong-Young Lee ◽

Joo-Il Park ◽

Manyoul Ha ◽

Joongpyo Shim ◽

...

Keyword(s):

Coal Tar ◽

Coke Formation ◽

Polarized Light ◽

Extraction Process ◽

Coke Production ◽

Coal Tar Pitch ◽

Needle Coke ◽

Process Yield ◽

Anisotropic Flow ◽

Kinetics Of

Various fractionalized solvents with different paraffinicities were adopted to maximize the efficiency of the quinoline insoluble (QI) extraction process for coal tar pitch. In addition, highly pressurized conditions combined with raised temperature (4 bar at 300 °C) were used to accelerate the reaction kinetics of the extraction process. The QI content of purified coal tar pitch was analyzed to be 0.1% at a process yield of up to 72% as a solvent with a K-factor of 10 and above was used. Purified coal tar pitch was then processed to form anisotropic coke using a lab-scale tube bombe reactor. The texture observed under a polarized light microscope showed an anisotropic flow domain, a unique morphological feature of needle coke. The additives and reaction conditions used in this study for QI extraction for coal tar pitch were found to be effective and feasible as preliminary processing in needle coke production.

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Co‐carbonization of Medium and Low Temperature Coal Tar Pitch and Coal‐based Hydrogenated Diesel Oil Prepare Mesophase Pitch for Needle Coke Precursor

Advanced Engineering Materials ◽

10.1002/adem.202001523 ◽

2021 ◽

Author(s):

Yucheng Tian ◽

Ye Huang ◽

Xinli Yu ◽

Feng Gao ◽

Shenghui Gao ◽

...

Keyword(s):

Low Temperature ◽

Coal Tar ◽

Diesel Oil ◽

Coal Tar Pitch ◽

Mesophase Pitch ◽

Needle Coke

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XRD Characterization of the Structure of Graphites and Carbon Materials Obtained by the Low-Temperature Graphitization of Coal Tar Pitch

Eurasian Chemico-Technological Journal ◽

10.18321/ectj198 ◽

2015 ◽

Vol 17 (2) ◽

pp. 87 ◽

Cited By ~ 20

Author(s):

Ch.N. Barnakov ◽

G.P. Khokhlova ◽

A.N. Popova ◽

S.A. Sozinov ◽

Z.R. Ismagilov

Keyword(s):

Low Temperature ◽

Carbon Materials ◽

Coal Tar ◽

Structural Phase ◽

Coherent Scattering ◽

Amorphous Structure ◽

Coal Tar Pitch ◽

X Ray Diffraction ◽

Needle Coke ◽

The Individual

The structure of some commercial graphites and carbon materials (CMs) obtained by the low-temperature catalytic graphitization of coal tar pitch with iron salt, needle coke, foamed graphite as the catalysts has been studied. The study was performed using the X-ray diffraction technique with reflections from base plane and their decomposition into two components corresponding to the structural phases of graphite which have different XRD characteristics. Various CMs were compared with respect to the structural phase ratio, distance between polyarene layers in these phases, and sizes of the coherent scattering regions. The (004) reflection provided a better fit of some properties of graphites to the calculated XRD characteristics as compared to calculation from the (002) reflection. In the case of carbonization of coal tar pitch with investigated catalyst additions, prepared carbon materials have a higher degree of graphitization and a crystallite size greater than in the other case of carbonization of the individual pitch. The highest catalytic activity is shown by foamed graphite. It was found that the use of foamed graphite as the catalyst at 800-900 ºC produced carbon materials possessing a crystalline structure with interplanar spacing close to that in commercial graphites, while in the absence of catalyst the coal tar pitch material has an amorphous structure.

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The effect of mechanical vibration on the structure of needle coke prepared from a modified coal tar pitch

Carbon ◽

10.1016/j.carbon.2017.10.060 ◽

2018 ◽

Vol 130 ◽

pp. 845 ◽

Cited By ~ 3

Author(s):

Ying Wang ◽

Ya-wei Dong ◽

Cun-gui Zhong ◽

Qing Cao

Keyword(s):

Coal Tar ◽

Mechanical Vibration ◽

Coal Tar Pitch ◽

Needle Coke

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Carbonization of coal-tar pitch into lump needle coke in a tube bomb

Journal of Materials Science ◽

10.1007/bf01133349 ◽

1987 ◽

Vol 22 (11) ◽

pp. 3989-3994 ◽

Cited By ~ 11

Author(s):

Sao Mochida ◽

You Qing Fei ◽

Takashi Oyama ◽

Yozo Korai ◽

Hiroshi Fujitsu

Keyword(s):

Coal Tar ◽

Coal Tar Pitch ◽

Needle Coke

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Thermal Conversion Characteristics of Coal Tar Soft Pitch at Atmospheric and Elevated Pressures

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1015.467 ◽

2014 ◽

Vol 1015 ◽

pp. 467-471

Author(s):

Li Yue ◽

Xue Fei Zhao ◽

Shi Quan Lai ◽

Li Juan Gao ◽

Jie Yang ◽

...

Keyword(s):

Formation Rate ◽

Coal Tar ◽

Elevated Pressure ◽

Thermal Conversion ◽

Raw Material ◽

Needle Coke ◽

Consecutive Reaction ◽

Elevated Pressures ◽

Carbon Structures ◽

Group Compositions

Coal tar soft pitch (CTSP) used as raw material of preparing needle coke was heat-treated at 460, 480 and 500 °C for different holding time under the pressure of 0 MPa and 0.25 MPa. The changes of group compositions such as toluene solubles (TS), toluene insolubles-quinoline solubles (TI-QS) and quinoline insolubles (QI) were mainly studies during the thermal conversion of the CTSP. The microstructure morphologies of some calcined cokes were characterized by scanning electron microscope (SEM). The results showed that the thermal conversion of the CTSP had the features of consecutive reaction, and the pressure could accelerate the conversion rate of TS and TI-QS and the formation rate of QI. The calcined coke derived from the semi-coke obtained at atmospheric pressure exhibited better and longer streamlined fiber structures than that of the semi-coke obtained at elevated pressure, while the latter possessed more compact carbon structures than the former.

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