simulation of ch4/co2 mixture separation by pressure swing adsorption in the aspen adsorption

In this work, the removal of carbon dioxide from a carbon dioxide/methane mixture by a pressure swing adsorption (psa) process was studied the adsorption process for three types of adsorbents including zeolite 13x, activated carbon and utsa-16 mof was studied first, the adsorption of co2 on three adsorbents in a single adsorption column was simulated and the best adsorbent was selected then, the psa process was investigated for the best selected adsorbent all the simulations were done in the aspen adsorption v88 and the psa process includes 4 beds and 8 steps operating conditions were assumed to be temperature of 300 k, and pressures of 25 and 5 bar the results showed that zeolite 13x has more adsorption capacity of co2 than both activated carbon and utsa-16 mof also, zeolite 13x in the psa cycle has the best performance and the methane product with the purity of 9999 mole% can be produced