Study of the adsorption characterictics and pore structure of activated carbons

Abstract

Charcoal prepared by heating walnut shells at 500 °C in a nitrogen atmosphere was activated by CO₂ at various temperatures. The adsorption equilibrium and mass transfer characteristics of the activated carbon were studied. The structural properties were determined by means of additional measurements. A pore model is proposed to explain the variation of the pore structure with the activation process. The micropore sizes predicted by the model agree with the adsorption data.