Reference isotherm for high pressure adsorption of CO2 by carbons at 273 K

It is suggested that the adsorption of CO2 on Vulcan 3G at 273 K and up to 3.2 MPa can be used as a reference isotherm for the characterization of por ous and non-porous carbons. The results obtained with the proposed referenc e are in good agreement with those of the nitrogen (77 K) and benzene (293 K) comparison plots. The external surface areas have also been compared wit h those obtained from immersion calorimetry into C6H6 at 293 K. It also app ears that at low relative pressures CO2 adsorbed on Vulcan 3G follows the D ubinin-Radushkevich-Kaganer equation between 253 and 273 K. (C) 2001 Elsevi er Science Ltd. All rights reserved.