The removal of acid gases from crude natural gas by using novel supported liquid membranes Original Research Article

In this study, the novel supported liquid membranes were prepared by incorporating room-temperature ionicliquids into poly(vinylidene fluoride)(PVDF) matrix via phase separation technique. The new technique whichenables to prepare the novel supported liquid membranes consisted mainly of two processes; the low temperaturephase separation and the high temperature quenching process. The membranes had excellent stability under severoperating conditions. Also the permeation behaviors of acid gases (H2S, CO2) and CH4 through the membraneswere investigated for verifying usefulness of the membranes to remove acid gases from crude natural gas. Thenovel supported liquid membranes exhibited very high H2S, CO2 permeability coefficients and H2S/CH4, CO2/CH4 selectivities, respectively.