Thermal conversion mechanism and thermodynamics of mixed oil in coal‐based needle coke production

2019 ◽  
Vol 14 (5) ◽  
Author(s):  
Jun‐xia Cheng ◽  
Xue‐fei Zhao ◽  
Li‐juan Gao ◽  
Ya‐ming Zhu
Keyword(s):  
Thermal Conversion ◽  
Coke Production ◽  
Needle Coke ◽  
Mixed Oil

Research on Coal Tar Pitch Based Needle Coke Production Quality

2013 ◽  
Vol 711 ◽  
pp. 155-160 ◽  
Author(s):  
Xia Ping Zhou ◽  
Dong Sheng Xu ◽  
Pi Xiang Zhang ◽  
Si Cong Yin ◽  
Ju Xing Long ◽  
...  
Keyword(s):  
Kinetic Model ◽  
Thermal Sensitivity ◽  
Coal Tar ◽  
Thermal Conversion ◽  
Coke Production ◽  
Production Quality ◽  
Experimental Results ◽  
Coal Tar Pitch ◽  
Needle Coke ◽  
Calculated Concentration

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.

Optimization of carbonization conditions for needle coke production from a low-sulphur petroleum vacuum residue

1988 ◽  
Vol 23 (1) ◽  
pp. 298-304 ◽  
Author(s):  
Isao Mochida ◽  
Takashi Oyama ◽  
You Qing Fei ◽  
Tetsuya Furuno ◽  
Yozo Korai
Keyword(s):  
Coke Production ◽  
Vacuum Residue ◽  
Needle Coke

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

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.

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

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.

scholarly journals Technology of Petroleum Needle Coke Production in Processing of Decantoil with the Use of Polystyrene as a Polymeric Mesogen Additive

ACS Omega ◽  
2021 ◽  
Author(s):  
Renat R. Gabdulkhakov ◽  
Viacheslav A. Rudko ◽  
Vladimir G. Povarov ◽  
Valery L. Ugolkov ◽  
Igor N. Pyagay ◽  
...  
Keyword(s):  
Coke Production ◽  
Needle Coke

Calcium pyrophosphate powder synthesized from phosphoric acid and calcium carbonate

2020 ◽  
pp. 42-48
Author(s):  
Tatiana Safronova ◽  
◽  
Tatiana Shatalova ◽  
Snezhana Tikhonova ◽  
Yaroslav Filippov ◽  
...  
Keyword(s):  
Calcium Carbonate ◽  
Phosphoric Acid ◽  
Functional Materials ◽  
Bone Defects ◽  
Thermal Conversion ◽  
Calcium Pyrophosphate ◽  
Molar Ratio

Powders of calcium pyrophosphate Ca2P2O7 in the form of γ- и β-modifications have been produced as a result of thermal conversion of brushite CaHPO4∙2H2O synthesized from phosphoric acid H3PO4 and calcium carbonate CaCO3 at the molar ratio P / Ca = 1.1. The resulting powders can be used for production of various functional materials including biocompatible and bioresorbable ones for the treatment of bone defects.

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