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Structural evolution of the thermal conversion products of modified coal tar pitch

  • Carbon Letters
  • Abbr : Carbon Lett.
  • 2023, 33(1), pp.261-271
  • DOI : 10.1007/s42823-022-00433-8
  • Publisher : Korean Carbon Society
  • Research Area : Natural Science > Natural Science General > Other Natural Sciences General
  • Received : April 8, 2022
  • Accepted : November 7, 2022
  • Published : February 1, 2023

Li Qi 1 Han Dongyun 1 Qiao Haiyan 1 Shi Weiwei 1 Zhang Yuqi 1 Cao Zubin 1

1College of Petroleum and Chemical Engineering, Liaoning Petrochemical University

Accredited

ABSTRACT

Coal tar pitch is a product with high carbon content and aromatic compounds. Modified coal tar pitch is a high quality raw material for the preparation of intermediate phase pitch, needle coke, carbon microspheres, et al. In this paper, modified coal tar pitch was used as raw material, nitrogen was used as protective gas, and thermal conversion was carried out at constant temperatures (370, 390, 410, 420 °C). Polarized light microscopy, SEM, elemental analysis, FTIR spectroscopy, Raman spectroscopy and XRD diffraction combined with split-peak fitting were used to characterize the microstructures of the thermal transformation products. The results showed that the Iar and CH3/CH2 contents of the products increased with the gradual increase of the thermal conversion temperature, and the aromatic content increased. And the higher the temperature at the same heating rate, the more the ideal graphite microcrystal content, and the defective graphite microcrystals are converted into ideal graphite microcrystals during the thermal conversion process. When the reaction temperature exceeds 390 °C, the microstructure of the thermal transformation products is anisotropic spheres, and the small spheres fuse with each other and tend to be basin-like and mosaic structure as the temperature increases.

Citation status

Scopus Citation Counts (1) This is the result of checking the information with the same ISSN, publication year, volume, and start page between articles in KCI and the SCOPUS journals. (as of 2023-10-01)

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