Transactions of the Korean hydrogen and new energy society (한국수소및신에너지학회논문집)

The Korean Hydrogen and New Energy Society (한국수소및신에너지학회)
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Preparation and Characterization of Mesophase Pitches from Petroleum Residues using Two-step Heat Treatment

석유계 잔사유로부터 저온 2단 열처리를 이용한 메조페이스 핏치 제조 및 특성

  • JO, HANJOO (Dept. of Chemical engineering and Applied Chemistry, Chungnam National Univ.) ;
  • JUNG, MIN-JUNG (Dept. of Chemical engineering and Applied Chemistry, Chungnam National Univ.) ;
  • LEE, HYUNG-IK (The 4th R&D Institute-4, Agency for Defense Development) ;
  • LEE, YOUNG-SEAK (Dept. of Chemical engineering and Applied Chemistry, Chungnam National Univ.)
  • 조한주 (충남대학교 응용화학공학과) ;
  • 정민정 (충남대학교 응용화학공학과) ;
  • 이형익 (국방과학연구소) ;
  • 이영석 (충남대학교 응용화학공학과)
  • Received : 2016.05.16
  • Accepted : 2016.08.30
  • Published : 2016.08.30
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Abstract

To prepare mesophase pitches through low energy process, pyrolysis fuel oil with $AlCl_3$ has been modified using two-step heat treatment which is heat-treated at $330^{\circ}C$ for 3~5 h after pre-treatment at $250^{\circ}C$. The result of polarized optical microscope observation, mesophase is not observed in pitches carried out only pre-heat treatment. While mesophase content is significantly increased from 9% to 100% according to increasing secondary heat treatment time from 3 h to 5 h. Synthesizing of the mesophase pitch at low temperature of $330^{\circ}C$ is attributed to decrease of viscosity of the pitches carried out first heat treatment with $AlCl_3$. The result of Fourier-transform infrared spectroscopic analysis, it is expected that aromatization of aliphatic compounds is dominant at early secondary heat treatment, on the other hand, polycondensation reaction becomes dominant as secondary heat treatment time increases. Aromaticity and stacking height of the pitches secondary heat treated for 5 hours are more increased about 25% and 107%, respectively, than that of pitches carried out only first heat treatment.

Keywords

References

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