Zeolites and metal organic frameworks were evaluated for biogas upgrading and storage respectively. For upgrading the CO2 adsorption capacity and CO2/N2 and CO2/CH4 selectivity two different zeolites, zeolite NaX and zeolite CaA was tailored by partial exchange of Na and Ca cations with K+ and Cs+. The optimization was carried out in two stages, introducing potassium in the first step and then adding cesium to the NaKX and CaKA samples. Single gas adsorption isotherms of CO2, N2 and CH4 were recorded and the CO2/N2 and CO2/CH4 selectivity was calculated using Henry’s law constants. NaKCsX sample containing 5.48at% of potassium and 0.28at% of cesium shows CO2/N2 selectivity of 421, with 117 cm3/g STP CO2 adsorption capacity (at 90kPa pressure and 298K), and CO2/CH4 selectivity of 153, offering a performance superior to the pure NaX. High CO2/N2 selectivity of over 8100 was obtained in the case of CaKCsA sample, containing 2.5at% of potassium and 0.79at% of cesium, exhibiting 73 cm3/g STP CO2 uptake at 90kPa pressure. For gas storage purposes Ni-MOF-74, next to some other MOFs, was synthesized and evaluated. An interesting morphology and unusual crystal structure was obtained for some of the synthesized materials.