Journal of the Korean Applied Science and Technology (한국응용과학기술학회지)

The Korean Society of Applied Science and Technology (한국응용과학기술학회)
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Characterization of Activation of Various Carbon Fibers via Chemical Activation with KOH

KOH에 의한 활성화된 탄소섬유들의 활성화특성

  • Lim, Yun-Soo (Department of Materials Science and Engineering, Myongji University) ;
  • Moon, Sook-Young (Department of Materials Science and Engineering, Myongji University) ;
  • Han, Dong-Yun (Department of Materials Science and Engineering, Myongji University) ;
  • Lee, Byung-Ha (Department of Materials Science and Engineering, Myongji University)
  • 임연수 (명지대학교 공과대학 세라믹공학과) ;
  • 문숙영 (명지대학교 공과대학 세라믹공학과) ;
  • 한동윤 (명지대학교 공과대학 세라믹공학과) ;
  • 이병하 (명지대학교 공과대학 세라믹공학과)
  • Published : 2005.03.31
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Abstract

OXI-PAN fibers, Kynol fibers and rayon fibers were used as precursorsfor the preparation of activated carbon fibers (ACFs) by chemical activation with KOH at $800^{\circ}C$. The effects of different precursorfibers and fiber/KOH ratios on the final ACFs are discussed. The precursor fibers used are appropriate for the ACFs in a single stage pyrolysis process. The OXI-PAN fibers which were activated with KOH of 2.0M showed a specific surface area of $2328m^2/g$ however, loosed the fiber shape because of low yields. The Kynol fibers and Rayon fibers showed the high yields but the lower specific surface area of $900m^2/g$ and $774m^2/g$, respectively, at KOH of 1.5M. The OXI-PAN fibers which were activated with KOH of 1.5M have a specific surface area of $1028m^2/g$ and higher micro-pore volumes and lower yields rather than Kynol-1.5 and Rayon-1.5 samples. This phenomenon is because of higher chemical resistance of the Kynol and Rayon fibers rather than OXI-PAN fibers. However, the Kynol fibers were the best precursors on KOH activation at $800^{\circ}C$ considered carbon yields, surface areas and micropore volumes.

Keywords

References

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