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Vol. 26 No. 17 (2014): Vol 26 Issue 17

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Percolation Evolution and Characteristics in the Formation Process of Pores for Porous Graphite

https://doi.org/10.14233/ajchem.2014.18120
Qili Wang
School of Chemical Engineering and Technology, China University of Mining & Technology, Xuzhou, P.R. China
Min He
School of Mechanical & Electrical Engineering, Xuzhou Institute of Technology, Xuzhou, P.R. China
Yaqun He
School of Chemical Engineering and Technology, China University of Mining & Technology, Xuzhou, P.R. China
Yafei Hu
School of Chemical Engineering and Technology, China University of Mining & Technology, Xuzhou, P.R. China
Qi Liu
School of Mechanical and Electrical Engineering, China University of Mining and Technology, Xuzhou, P.R. China

Corresponding Author(s) : Qili Wang

wqlcumt@126.com

Asian Journal of Chemistry, Vol. 26 No. 17 (2014): Vol 26 Issue 17

Abstract

The micro-pore structure and distribution of graphite during the forming process of pores in roasting is developed and the evolution process from a local connection to infinite connectivity of pores is analyzed by percolation theory. The percolation characteristics of micro-structural images are analyzed based on the renormalization group method and the micro-pore structure is measured by mercury injection test. The analysis and experimental results show that the nature of the forming process of pores in roasting is the percolation evolution process from local area and finite clusters to global material and infinite clusters.The area porosity of graphite samples for filtration ranges from 0.541 to 0.588 and the volume porosity ranges from 0.297 to 0.403, which are greater than the threshold and have percolation structure. On the other hand, the area porosity of graphite samples for impregnation ranges from 0.189 to 0.314 and the volume porosity ranges from 0.107 to 0.155, which are smaller than the threshold and have no percolation structure.

Keywords

Porous graphite Percolation theory Percolation threshold Renormalization group
Wang, Q., He, M., He, Y., Hu, Y., & Liu, Q. (2014). Percolation Evolution and Characteristics in the Formation Process of Pores for Porous Graphite. Asian Journal of Chemistry, 26(17), 5396–5402. https://doi.org/10.14233/ajchem.2014.18120
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