he Permeability of CO2 through Cellulose acetate membranes increases dramatically with gas pressure. This anomalous behavior is due to the membranesplasticization by CO2.The unusual pressure dependence of permeability probablymakes permeation behavior of gas mixtures containing CO2 more complex

andsuch a Pers deqendence of Permeability cannot be interpreted in terms of conventional dual-mode model.In thes paper

a new modified dual-mode model wasdeveloped

and was ed to explain the pressure.dependence of permeability. The new model proposed was verified with experimental data.