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

Sao Mochida, You Qing Fei, Takashi Oyama, Yozo Korai, Hiroshi Fujitsu

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

The carbonization of coal-tar pitches and their QI (quinoline insoluble)-free fractions was studied by evaluating their lump cokes produced in a tube bomb at various temperatures (470 to 550° C) and pressures (0 to 75 kg cm-2 gauge). The lump coke from QI-free fractions had a comparable anisotropic development and coefficient of thermal expansion (CTE). The carbonization temperature and pressure were found to influence strongly the properties of the cokes. At the highest temperature of 550° C, the most appropriate pressure for the best needle coke was 15 kg cm-2 G (gauge). Either higher or lower pressure increased the CTE value of coke. In contrast, at a moderate temperature of 500° C, the higher pressure produced the better coke. At the lowest temperature of 470° C, it took 10 h to complete the carbonization, and the lowest pressure allowed the best extent of uniaxial arrangement. Among the cokes prepared under the present conditions, the Carbonization at 500° C under 40 kg cm-2 G produced the best needle coke with a CTE value as low as 0.1 × 10-6° C-1. The carbonization scheme leading into the needle coke is discussed for a better understanding of how the carbonization temperature and pressure cooperatively influence the quality of the resultant coke, in relation to the carbonization reactivity of coal-tar pitch.

Original languageEnglish
Pages (from-to)3989-3994
Number of pages6
JournalJournal of Materials Science
Volume22
Issue number11
DOIs
Publication statusPublished - Nov 1 1987

Fingerprint

Coal Tar
Coal tar
Carbonization
Coke
Needles
Thermal expansion
Temperature
Gages

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Mochida, S., Qing Fei, Y., Oyama, T., Korai, Y., & Fujitsu, H. (1987). Carbonization of coal-tar pitch into lump needle coke in a tube bomb. Journal of Materials Science, 22(11), 3989-3994. https://doi.org/10.1007/BF01133349

Carbonization of coal-tar pitch into lump needle coke in a tube bomb. / Mochida, Sao; Qing Fei, You; Oyama, Takashi; Korai, Yozo; Fujitsu, Hiroshi.

In: Journal of Materials Science, Vol. 22, No. 11, 01.11.1987, p. 3989-3994.

Research output: Contribution to journalArticle

Mochida, S, Qing Fei, Y, Oyama, T, Korai, Y & Fujitsu, H 1987, 'Carbonization of coal-tar pitch into lump needle coke in a tube bomb', Journal of Materials Science, vol. 22, no. 11, pp. 3989-3994. https://doi.org/10.1007/BF01133349
Mochida, Sao ; Qing Fei, You ; Oyama, Takashi ; Korai, Yozo ; Fujitsu, Hiroshi. / Carbonization of coal-tar pitch into lump needle coke in a tube bomb. In: Journal of Materials Science. 1987 ; Vol. 22, No. 11. pp. 3989-3994.
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