Effects of activation method on the pore structure of activated carbons from apricot stones

K. Gergova, S. Eser

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Two series of activated carbons were prepared from apricot stones by using carbonization followed by steam activation and one-step pyrolysis/activation in steam. The pore structure of the activated carbons was characterized by CO2 adsorption at 273 K and by N2 adsorption at 77 K. The macro-and mesoporosity were determined by mercury porosimetry. Optical microscopy, scanning electron microscopy (SEM) and environmental scanning electron microscopy (ESEM) were used to examine the microstructure of activated carbons. A considerable difference observed between the measured CO2 and N2 surface areas indicates a narrow microporosity in all the carbons. The two-step method produced better developed meso-and especially macroporosity. The SEM and optical micrographs show that one-step pyrolysis/steam activation preserves the original cell structure of the raw apricot stones. In general, the apparent surface areas of the two-step carbons are slightly higher than those of the one-step carbons. However, the one-step method would provide lower production costs because it would eliminate the separate carbonization stage.

Original languageEnglish (US)
Pages (from-to)879-888
Number of pages10
Issue number7
StatePublished - 1996

All Science Journal Classification (ASJC) codes

  • General Chemistry
  • General Materials Science


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