Modifications to carbonization of mesophase pitch by addition of carbon blacks

K. Kanno, J. J. Fernandez, F. Fortin, Y. Korai, I. Mochida

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

The addition of carbon blacks with large surface area or high oil absorption ability such as Ketjen Black (KB) was found very effective in suppress the swelling of mesophase pitch during carbonization. A good correlation between the swelling suppression and the dibutylphthalate (DBP) absorption ability indicates that a large effective volume of carbon black in the pitch system is a key factor in suppressing the swelling. The hollow structure and developed chain-like aggregate of carbon black particles are the origins of such large effective volume. Carbon black with large effective volume is well dispersed in mesophase pitch to initiate the pyrolysis of mesophase pitch at the lower temperature range, avoiding the intense pyrolysis and gas evolution in the narrow temperature range which leads to severe swelling of mesophase pitch. The carbon black dispersed in mesophase pitch is also effective to release the pyrolyzed gas smoothly from almost solidifying mesophase pitch of very high viscosity. Air- and CO2-gasification of a carbon black (MA600) improved its ability of swelling suppression comparable to that of KB. The air-gasification introduced a graphitic shell and hollow core in the particles of MA600 as observed with KB, significantly increasing the surface area at the low burn-off rate. The CO2-gasification decreased the nodule size, increasing the surface area proportionally with the burn-off rate. Such a structural change appeared to improve the ability for suppressing the swelling of mesophase pitch.

Original languageEnglish
Pages (from-to)1627-1637
Number of pages11
JournalCarbon
Volume35
Issue number10-11
DOIs
Publication statusPublished - Jan 1 1997

Fingerprint

Soot
Carbonization
Carbon black
Swelling
Gasification
Pyrolysis
Gases
Air
Oils
Viscosity
Temperature

All Science Journal Classification (ASJC) codes

  • Chemistry(all)

Cite this

Kanno, K., Fernandez, J. J., Fortin, F., Korai, Y., & Mochida, I. (1997). Modifications to carbonization of mesophase pitch by addition of carbon blacks. Carbon, 35(10-11), 1627-1637. https://doi.org/10.1016/S0008-6223(97)00123-1

Modifications to carbonization of mesophase pitch by addition of carbon blacks. / Kanno, K.; Fernandez, J. J.; Fortin, F.; Korai, Y.; Mochida, I.

In: Carbon, Vol. 35, No. 10-11, 01.01.1997, p. 1627-1637.

Research output: Contribution to journalArticle

Kanno, K, Fernandez, JJ, Fortin, F, Korai, Y & Mochida, I 1997, 'Modifications to carbonization of mesophase pitch by addition of carbon blacks', Carbon, vol. 35, no. 10-11, pp. 1627-1637. https://doi.org/10.1016/S0008-6223(97)00123-1
Kanno K, Fernandez JJ, Fortin F, Korai Y, Mochida I. Modifications to carbonization of mesophase pitch by addition of carbon blacks. Carbon. 1997 Jan 1;35(10-11):1627-1637. https://doi.org/10.1016/S0008-6223(97)00123-1
Kanno, K. ; Fernandez, J. J. ; Fortin, F. ; Korai, Y. ; Mochida, I. / Modifications to carbonization of mesophase pitch by addition of carbon blacks. In: Carbon. 1997 ; Vol. 35, No. 10-11. pp. 1627-1637.
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