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Calcium oxide incorporated porous carbon materials were synthesized by the impregnation method to study CO 2  adsorption and separation of CO 2 /CH 4 . The X-ray diffraction, Raman analysis, N 2  isotherms at 77 K, and SEM with EDX analysis were used to characterize synthesized materials. XRD and N 2  isotherm results have confirmed that synthesized carbon has porosity, and EDX analysis has reported that the presence of CaO on porous carbon. 10CaO/porous carbon has shown 31 cm 3  g −1  of CO 2  adsorption which was higher than bare porous carbon CO 2  adsorption 17.5 cm 3  g −1  at 298 K, 1 bar. It was attributed to electrostatic interaction between CaO and CO 2 . However, CH 4  adsorption was decreased by a decrease in surface area. The selectivity of CO 2 /CH 4  was higher for 10CaO/porous carbon and the heat of CO 2  adsorption was 36 KJ/mol at high adsorption of CO 2 . Moreover, CO 2  adsorption was the same in each adsorption cycle.

Porous carbon supported calcium oxide for CO 2 adsorption and separation of CO 2 /CH 4