Korean Journal of Materials Research (한국재료학회지)

Materials Research Society of Korea (한국재료학회)
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Preparation of Coal Tar Pitch as Carbon Fibers Precursor from Coal Tar

콜타르로부터 탄소섬유 제조를 위한 프리커서용 석탄계 핏치의 제조

  • Ko, Hyo Joon (Dept. of Materials Science and Engineering, Myongji University) ;
  • Park, Chang Uk (Dept. of Materials Science and Engineering, Myongji University) ;
  • Cho, Hyo Hang (Dept. of Materials Science and Engineering, Myongji University) ;
  • Yoo, Mi Jung (Dept. of Chemical Engineering, Myongji University) ;
  • Kim, Myung-Soo (Dept. of Chemical Engineering, Myongji University) ;
  • Lim, Yun-Soo (Dept. of Materials Science and Engineering, Myongji University)
  • 고효준 (명지대학교 신소재공학과) ;
  • 박창욱 (명지대학교 신소재공학과) ;
  • 조효행 (명지대학교 신소재공학과) ;
  • 유미정 (명지대학교 화학공학과) ;
  • 김명수 (명지대학교 화학공학과) ;
  • 임연수 (명지대학교 신소재공학과)
  • Received : 2013.04.12
  • Accepted : 2013.05.02
  • Published : 2013.05.27
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Abstract

Coal tar is the primary feedstock of premium graphitizable carbon precursor. Coal tars are residues formed as byproducts of thermal treatments of coal. Coal tar pitches were prepared through two different heat treatment schedules and their properties were characterized. One was prepared with argon and oxidation treatment with oxygen; the other was prepared with oxygen treatment at low temperature and then argon treatment at high temperature; both used coal tar to prepare coal tar pitches. To modulate the properties, different heat treatment temperatures ($300{\sim}400^{\circ}C$) were used for the coal tar pitches. The prepared coal tar pitches were investigated to determine several properties, such as softening point, C/H ratio, coke yield, and aromaticity index. The coal tar pitches were subject to considerable changes in chemical composition that arose due to polymerization after heat treatment. Coal tar pitch showed considerable increases in softening point, C/H ratio, coke yields, and aromaticity index compared to those characteristics for coal tar. The contents of gamma resin, which consists of low molecular weight compounds in the pitches and is insoluble in toluene, showed that the degree of polymerization in the pitches was proportional to C/H ratio. Using an oxidizing atmosphere like air to prepare the pitches from coal tar was an effective way to increase the aromaticity index at relatively low temperature.

Keywords

References

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