Nanoporous Structure of Adsorbents Obtained by Alkali Activation of Different Rank Coals

Authors

  • Yu. V. Tamarkina Litvinenko Institute of Physical-Organic and Coal Chemistry of National Academy of Sciences of Ukraine
  • V. A. Kucherenko Litvinenko Institute of Physical-Organic and Coal Chemistry of National Academy of Sciences of Ukraine
  • T. G. Shendrik Litvinenko Institute of Physical-Organic and Coal Chemistry of National Academy of Sciences of Ukraine

Abstract

Porous structure of adsorbents obtained by alkali activation of Donbass different rank coals, was studied by low temperature adsorption of nitrogen. It was found the increase in carbon content (Cdaf) from 80.0 to 95.2% causes the increase of adsorbents yield (from 53.9 to 83.5%), the decrease of SBET (from 1560 to 306 m2/g); V? (from 0.71 to 0.15 cm3/g); Vmi (from 0.51 to 0.11 cm3/g); volume of subnanopore (from 0.46 to 0.06 cm3/g). By DFT methods, the most narrow micropore size distribution was shown to possess adsorbents from middle rank coals (Cdaf = 86–90%). The maximum subnanopore portion (66–81% V? = 0.46 cm3/g at SBET = 1045 m2/g) is inherent to adsorbents from high rank coal (Cdaf = 91.2%).

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(1)
Tamarkina, Y. V.; Kucherenko, V. A.; Shendrik, T. G. Nanoporous Structure of Adsorbents Obtained by Alkali Activation of Different Rank Coals. Him. Fiz. Tehnol. Poverhni 2012, 3, 300-306.

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Vol. 3 No. 3 (2012): Chemistry, Physics and Technology of Surface / Himia, Fizika ta Tehnologia Poverhni

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