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Effect of potassium permanganate pretreatment of pitch on the textural properties of pitch-based activated carbons
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  • Journal title : Carbon letters
  • Volume 12, Issue 3,  2011, pp.167-170
  • Publisher : Korean Carbon Society
  • DOI : 10.5714/CL.2011.12.3.167
 Title & Authors
Effect of potassium permanganate pretreatment of pitch on the textural properties of pitch-based activated carbons
Kim, Dae-Won; Park, Soo-Jin;
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Petroleum pitch-based activated carbons (ACs) were obtained in this work from a combination of pretreatment with different amounts of potassium permanganate () and chemical activation with potassium hydroxide. The surface characteristics of the pitch after the pretreatment were characterized by means of Fourier transform infrared spectroscopy (FT-IR). The structural characteristics of the pitch after the pretreatment were determined by means of X-ray diffraction. The influence of the treatment on the textural properties of the petroleum pitch-based ACs was investigated by means of /77K adsorption isotherms. The investigation also involved the use of the Brunauer-Emmett-Teller equation and the Dubinin-Radushkevich method. The FT-IR results show that the pretreatment promotes the formation of surface oxygen functionalities and leads to an increase of the interplanar distance () of the functional groups induced between carbon layers. Moreover, the specific surface area of the pitch-based ACs increases in proportion to the amount of pretreatment and reaches its highest value of 2334 /g with 2 g of because the surface oxygen groups of the pitch act as an active site during chemical activation.
activated carbons;petroleum pitch;potassium permanganate;chemical treatment;
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