Adsorption of CO2 and SO2 on activated carbons with a wide range of micropore size distribution Original Research Article

The adsorption isotherms of N2 at 77K, CO2 at 251, 273 and 298K, and SO2 at 262 and 273K have been determined on a series of physically activated carbons with a wide range of micropore size distributions. Since the series includes carbons with very high burn-off, it shows the problems involved in the characterization of microporsity in superactivated carbons. On the other hand, the results show that the carbon surface-adsorbate interactions for SO2 at low relative pressures are weaker than for N2 and CO2, as a result of the strong adsorptive-adsorptive interactions in the bulk gas phase.