Up-grading of Solvolytic Coal Liquids into a Feedstock for the Needle-Cokes

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  • MOCHIDA Isao
    Research Institute of Industrial Science, Kyushu University
  • OHISHI Taiji
    Graduate School of Engineering Science, Department of Molecular Engineering, Kyushu University
  • KORAI YOZO
    Research Institute of Industrial Science, Kyushu University
  • FUJITSU Hiroshi
    Research Institute of Industrial Science, Kyushu University

Bibliographic Information

Other Title
  • ソルボリシス石炭液化油のコークス化

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Description

Carbonization properties of the solvolytic coal liquid (SCL) which was produced thermally from the mixture of a coking coal and a petroleum asphalt were studied to find its utilization procedure as a feedstock for needle-cokes. The cokes obtained singly from SCL showed a heterogeneous appearance of isotropic and fine mosaic texture. Although its cocarbonization with Ashland Petroleum pitch A 240 and its hydrogenated one HA 240 allowed uniform development of mosaic texture, the flow texture characteristic to the needle coke still failed to demelop. BH-SCL, hydrogenated SCL with lithium-ethylenediamine, produced cokes of elongated mosaic texture. In contrast, CH-SCL, hydrotreated SCL with a Co-Mo catalyst under hydrogen pressure, could develop the excellent flow texture, although the coke yield was considerably decreased. High coke yields were achived by the solvent fractionation with hexane or benzene-ethanol mixture, maintaining the excellent flow texture development. Comparing the structural indices of SCL, BH-SCL, and CH-SCL, which were modifying during the up-grading processes, structural characteristics required for the flow texture development were discussed in the carbonization scheme according to the mesophase mechanism.

Journal

  • NIPPON KAGAKU KAISHI

    NIPPON KAGAKU KAISHI 1983 (8), 1165-1171, 1983-08-10

    The Chemical Society of Japan

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