Evaluation of a mixed geometry model for the characterization of activated carbons

Abstract

The predictions of the Pure Slit Geometry Model (PSGM) and the Mixed Geometry Model (MGM) for the characterization of activated carbons (AC) are compared and tested against the behavior of the textural properties of series of AC obtained from coconut shells by varying the concentration of the chemical activation agent over a wide range. Through the analysis of results it is concluded that the MGM can be regarded as reliable as the PSGM, with an apparently more consistent description of the behavior as a function of the degree of chemical activation and superior consistency between the results for different adsorbates, like N2 and CO2.