Adsorption equilibrium isotherms of

Adsorption equilibrium isotherms of propane and propylene at 343, 373 and 423 in the 0–300 kPa pressure range are shown in Figs. 6 and 7, respectively. Solid lines in figures correspond to the Toth model fitting while dotted lines are the Dubinin–Radushkevich model. At the lower temperature measured, the saturation plateau is reached around 200–250 kPa for both gases. Clearly, the selectivity of the material towards propylene is not high: in the low-pressure range the Henry constant relation (H /H ) are 2.3 (343 K) and 1.7 (423 K). The fitting parameters of both models are shown in Table 4. Propylene data at 343 K is comparable with previous reports at 323 K on CMS 5A [11].