Collect. Czech. Chem. Commun. 1996, 61, 1445-1456

Adsorption and Diffusion of Carbon Dioxide in Phenolic Resin Carbonizates

František Kolářa, Pavel Fottb and Jaroslava Svítilováa

a Institute of Rock Structure and Mechanics, Academy of Sciences of the Czech Republic,182 09 Prague 8, Czech Republic
b Czech Hydrometeorological Institute, 143 06 Prague 4, Czech Republic


The adsorption and diffusion of CO2 in phenolic resin carbonizates prepared at final carbonization temperatures of 500, 600, and 700 °C were investigated at 20 °C and pressures of 6 to 130 kPa. The experimental data were compared with theoretical dependences obtained by numerical solution of differential equations set up based on the occluded gas model and on the model of diffusion through a pore network. The former model, which assumes that the diffusion is driven by the concentration gradient of the gas dissolved in the solid, was found to fit the experimental data better than the latter model.

Keywords: Adsorption; Diffusion; Microporous carbon membranes.