Laboratory investigation of carbon dioxide separation from methane using a PES/Pebax 1657 composite membrane

摘要

Removal of carbon dioxide from methane is a critical issue in the gas sweetening and treatment units. The aim of this study is to investigate the capability of PES/Pebax composite membrane in order to CO2 removal from the CH4. In this regard, permeability values of both carbon dioxide and methane have been measured. The ranges of temperature and pressure used for pure gases experiments were 20-50 degrees C and 2.5-10bar, respectively. Moreover, influence of CO2 concentration on the CH4 permeability and its selectivity was studied. Results indicated that the pressure and temperature have significant influence on permeability and selectivity. In addition, for the gas mixtures, experiments were carried out at 5bar and 35 degrees C. Results also indicated that at higher CO2 concentrations the CO2 permeability increased significantly.