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Effects of hydrogenation of petroleum pitch on mesophase formation

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Abstract

The effects of hydrogenation of petroleum pitch on mesophase formation have been studied in terms of the hydrogen donor (D a) and acceptor (A a) abilities of starting pitch, the temperature dependence of mesophase content, the thermal properties of the resultant mesophase pitches with differential scanning calorimetry (DSC), and 13C-NMR spectra of the mesophase pitches in the liquid and solid states. Hydrogenation of petroleum-derived pitch causes a significant increase of (D a) and a clear shift of the mesophase generation temperature to the hightemperature side. Measurement of the characteristics of molecular size for mesophase pitches using DSC has been successfully accomplished. The increase of D a due to hydrogenation cause the production of mesophase having a smaller average molecular size and a more homogeneous molecular size distribution. The decrease of molecular size in the mesophase seems to cause the narrowing of the characteristic peak for mesophase around 180 p.p.m. in 13C-NMR spectra in the liquid state.

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References

  1. I. Mochida and Y. Korai, in “Petroleum-Derived Carbons” (American Chemical Society, Washington, 1986) p. 29.

    Book  Google Scholar 

  2. H. Marsh and C. S. Latham, ibid“ p. 7.

    Google Scholar 

  3. I. C. Lewis, Carbon 18 (1980) 191.

    Article  CAS  Google Scholar 

  4. R. A. Greinke and I. C. Lewis, ibid. 22 (1984) 305.

    Article  CAS  Google Scholar 

  5. I. C. Lewis, in Proceedings of 18th Biennial Conference on Carbon, Massachusetts (American Carbon Society, Worcester, 1987) p. 183.

    Google Scholar 

  6. I. Mochida, E. Nakamura, K. Maeda and K. Takeshita, Carbon 14 (1976) 123.

    Article  CAS  Google Scholar 

  7. I. Mochida, T. Ando, K. Maeda, H. Fujitu and K. Takeshita, ibid. 18 (1980) 131.

    Article  CAS  Google Scholar 

  8. I. Mochida, K. Simizu and Y. Korai, ibid. 26 (1988) 843.

    Article  CAS  Google Scholar 

  9. H. Marsh and P. L. Warker Jr, in “Chemistry and Physics of Carbon”, Vol. 15 (Dekker, New York, 1979) p. 229.

    Google Scholar 

  10. J. Lahaye, P. Ehrbuger, J. L. Saint-Romain and P. Couderc, Fuel 66 (1987) 1467.

    Article  CAS  Google Scholar 

  11. K. Azami, S. Yamamoto and Y. Sanada, Carbon 29 (1991) 943.

    Article  CAS  Google Scholar 

  12. T. Yokono, H. Marsh and M. Yokono, Fuel 60 (1981) 706.

    Google Scholar 

  13. T. Yokono, T. Obara, S. Iyama, J. Yamada and Y. Sanada, J. Fuel Soc. Jpn 63 (1984) 239.

    Article  CAS  Google Scholar 

  14. S. Iyama, T. Yokono and Y. Sanada, Carbon 24 (1986) 423.

    Article  CAS  Google Scholar 

  15. T. Yokono, T. Obara, S. Iyama and Y. Sanada, ibid. 22 (1984) 623.

    Article  CAS  Google Scholar 

  16. K. Azami, T. Yokono, Y. Sanada and S. Uemura, ibid. 27 (1989) 177.

    Article  CAS  Google Scholar 

  17. T. G. Fox Jr and P. J. Flory, J. Appl. Phys. 21 (1950) 581.

    Article  CAS  Google Scholar 

  18. A. Abragam, “Principles of Nuclear Magnetism” (Oxford University Press New York, 1961) p. 424.

    Google Scholar 

  19. F. W. Wehrli and T. Wirthlin, “Interpretation of Carbon-13 NMR Spectra” (Heyden & Son, London, 1978) supplement chart.

    Google Scholar 

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Authors and Affiliations

  1. Central Technical Research Laboratory, Nippon Oil Co. Ltd, 8 Chidori-cho, Naka-ku, 231, Yokohama, Japan

    K. Azami, O. Kato, H. Takashima & S. Yamamoto

  2. Faculty of Engineering, Hokkaido University, N14 W8, Kita-ku, 060, Sapporo, Japan

    Y. Sanada

Authors
  1. K. Azami
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  2. O. Kato
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  3. H. Takashima
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  4. S. Yamamoto
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  5. Y. Sanada
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Azami, K., Kato, O., Takashima, H. et al. Effects of hydrogenation of petroleum pitch on mesophase formation. Journal of Materials Science 28, 885–889 (1993). https://doi.org/10.1007/BF00400870

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  • DOI: https://doi.org/10.1007/BF00400870

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