抄録
Dried membranes heat treated at lower temperature less than 80°C did not virtually permeate gases when vacuum dried at room temperature but membranes dried at -25°C shows good permeability and did not shows good separation of CO2-CH4 gaseous mixture.
90°C heat treated membrane dried at -25°C shows ca. 5 times larger permeability than that dried at room temperature and both membranes show almost the same separation factor for CO2CH4 gaseous mixture.
70°C heat treated membrane dried at -25°C shows hysteresis phenomenon on the relation between permeation flux and pressure difference.
