Carbon letters

  • Volume 28
  • /
  • Pages.24-30
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  • 2018
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  • 1976-4251(pISSN)
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  • 2233-4998(eISSN)
Korean Carbon Society (한국탄소학회)
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Influence of kneading ratio on the binding interaction of coke aggregates on manufacturing a carbon block

  • Kim, Jong Gu (Carbon Industry Frontier Research Center, Korea Research Institute of Chemical Technology (KRICT)) ;
  • Kim, Ji Hong (Carbon Industry Frontier Research Center, Korea Research Institute of Chemical Technology (KRICT)) ;
  • Bai, Byong Chol (Korea Institute of Convergence Textile) ;
  • Choi, Yun Jeong (Carbon Industry Frontier Research Center, Korea Research Institute of Chemical Technology (KRICT)) ;
  • Im, Ji Sun (Carbon Industry Frontier Research Center, Korea Research Institute of Chemical Technology (KRICT)) ;
  • Bae, Tae-Sung (Jeonju Center, Korea Basic Science Institute) ;
  • Lee, Young-Seak (Institute of Carbon Fusion Technology, Chungnam National University)
  • Received : 2018.03.08
  • Accepted : 2018.05.02
  • Published : 2018.10.31
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Abstract

Coke aggregates and carbon artifacts were produced to investigate the interactions of coke and pitch during the kneading process. In addition, the kneading ratio of the coke and binder pitch for the coke aggregates was controlled to identify the formation of voids and pores during carbonization at $900^{\circ}C$. Experiments and thermogravimetric analysis revealed that carbon yields were improved over the theoretical yield calculated by the weight loss of the coke and binder pitch; the improvement was due to the binding interactions between the coke particles and binder pitch by the kneading process. The true, apparent, and bulk densities fluctuated according to the kneading ratio. This study confirmed that an excessive or insufficient kneading ratio decreases the density with degradation of the packing characteristics. The porosity analysis indicated that formation of voids and pores by the binder pitch increased the porosity after carbonization. Image analysis confirmed that the kneading ratio affected the formation of the coke domains and the voids and pores, which revealed the relations among the carbon yields, density, and porosity.

Keywords

References

  1. Wissler M. Graphite and carbon powders for electrochemical applications. J Power Sources, 156, 142 (2006). https://doi.org/10.1016/j.jpowsour.2006.02.064.
  2. Kawano Y, Fukuda T, Kawarada T, Mochida I, Korai Y. Suppression of puffing during the graphitization of pitch needle coke by boric acid. Carbon, 37, 555 (1999). https://doi.org/10.1016/s0008-6223(98)00221-8.
  3. Fukushima H, Drzal LT, Rook BP, Rich MJ. Thermal conductivity of exfoliated graphite nanocomposites. J Ther Anal Calorim, 85, 235 (2006). https://doi.org/10.1007/s10973-005-7344-x.
  4. Fujimoto KI, Mochida I, Todo Y, Oyama T, Yamashita R, Marsh H. Mechanism of puffing and the role of puffing inhibitors in the graphitization of electrodes from needle cokes. Carbon, 27, 909 (1989). https://doi.org/10.1016/0008-6223(89)90041-9.
  5. Ishiyama S, Burchell TD, Strizak JP, Eto M. The effect of high fluence neutron irradiation on the properties of a fine-grained isotropic nuclear graphite. J Nucl Mater, 230, 1 (1996). https://doi.org/10.1016/0022-3115(96)00005-0.
  6. Qin M, Feng Y, Ji T, Feng W. Enhancement of cross-plane thermal conductivity and mechanical strength via vertical aligned carbon nanotube@graphite architecture. Carbon, 104, 157 (2016). https://doi.org/10.1016/j.carbon.2016.04.001.
  7. Liu Z, Guo Q, Shi J, Zhai G, Liu L. Graphite blocks with high thermal conductivity derived from natural graphite flake. Carbon, 46, 414 (2008). https://doi.org/10.1016/j.carbon.2007.11.050.
  8. Zhong B, Zhao GL, Huang XX, Liu J, Tang XH, Wen GW, Wu Y. Binding natural graphite with mesophase pitch: a promising route to future carbon blocks. Mater Sci Eng A, 610, 250 (2014). https://doi.org/10.1016/j.msea.2014.05.038.
  9. Manocha LM, Bahl OP. Influence of carbon fiber type and weave pattern on the development of 2D carbon-carbon composites. Carbon, 26, 13 (1988). https://doi.org/10.1016/0008-6223(88)90004-8.
  10. Lu Y, Kocaefe D, Kocaefe Y, Huang XA, Bhattacharyay D, Coulombe P. Study of the wettability of coke by different pitches and their blends. Energy Fuels, 30, 9210 (2016). https://doi.org/10.1021/acs.energyfuels.6b01891.
  11. Hatano H, Suginobe H. Improvement and control of the quality of binder pitch for graphite electrodes. Fuel, 68, 1503 (1989). https://doi.org/10.1016/0016-2361(89)90287-1.
  12. Kim JG, Kim JH, Song BJ, Jeon YP, Lee CW, Lee YS, Im JS. Characterization of pitch derived from pyrolyzed fuel oil using TLC-FID and MALDI-TOF. Fuel, 167, 25 (2016). https://doi.org/10.1016/j.fuel.2015.11.050.
  13. Kim JG, Kim JH, Song BJ, Lee CW, Im JS. Synthesis and its characterization of pitch from Pyrolyzed fuel oil (PFO). J Ind Eng Chem, 36, 293 (2016). https://doi.org/10.1016/j.jiec.2016.02.014.