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Study on fractal model of activated carbon for pore formation

  • Carbon Letters
  • Abbr : Carbon Lett.
  • 2022, 32(3), pp.863-873
  • DOI : 10.1007/s42823-022-00324-y
  • Publisher : Korean Carbon Society
  • Research Area : Natural Science > Natural Science General > Other Natural Sciences General
  • Received : December 24, 2021
  • Accepted : February 7, 2021
  • Published : May 1, 2022

Wang Junzhe 1 Zhou Anning 2 Liu Guoyang 3 Song Zongxing 3 Ma Chao 1 Wang Dan 1

1Shaanxi Coal Industry New Energy Technology Co.
2Key Laboratory of Coal Resources Exploration and Comprehensive Utilization, Ministry of Natural
3College of Chemistry and Chemical Engineering, Xi’an University of Science and Technology

Accredited

ABSTRACT

In view of the activated carbon pore-forming mechanism, the fractal hypothesis of pore interior growth was proposed by optimizing the structure of Sierpinski sponge. Based on the hypothesis and the definition of fractal dimension, the function relationship between the reaction degree, reaction step length, specific surface area and pore volume was deduced, and the pore fractal growth model of activated carbon activation process was established. Semi-coke, apple charcoal and lychee charcoal were used to prepare activated carbon. The pore size distributions of the activated carbons are in accordance with the fractal growth hypothesis. Further, the reaction degree and reaction step length can be determined by the experimental data of pore and surface structure, which verified the feasibility of the pore fractal growth model.

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