Composite membranes have attracted increasing attentions owing to their potential applications for CO2 separation. In this work, ceramic supported polydimethylsiloxane (PDMS) and poly (ethylene glycol) diacrylate (PEGDA) composite membranes were prepared. The microstructure and physicochemical properties of the composite membranes were characterized. Preparation conditions were systematically optimized. The gas separation performance of the as-prepared membranes was studied by pure gas and binary gas permeation measurement of CO2 , N2 and H2 . Experiments showed that PDMS, as silicone rubber, exhibited larger permeance and lower separation factors. Conversely, PEGDA composite membrane presented smaller gas permeance but higher ideal selectivity for CO2 /N2 . Compared to the performance of those membranes using polymeric supports or freestanding membranes, the two kinds of ceramic supported composite membranes exhibited higher gas permeance and acceptable selectivity. Therefore, the ceramic supported composite membrane can be expected as a candidate for CO2 separation from light gases. Composite membranes have attracts increasing attentions due to their potential applications for CO2 separation. In this work, ceramic supported polydimethylsiloxane (PDMS) and poly (ethylene glycol) diacrylate (PEGDA) composite membranes were prepared. The microstructure and physicochemical properties of the composite membranes were The gas separation performance of the as-prepared membranes was studied by pure gas and binary gas permeation measurement of CO2, N2 and H2. Experiments showed that PDMS, as silicone rubber, resins, larger permeance and lower separation Compared to the performance of those membranes using polymeric supports or freestanding membranes, the two kinds of ceramic supported composite membranes exhibit higher gas permeance and acceptable selectivity. Therefore, the cer amic supported composite membrane can be expected as a candidate for CO2 separation from light gases.