Parametric study of CO2 separation using carbon molecular sieve, zeolite and silica gel

Abstract

Performances of Pressure swing adsorption (PSA) dependent on the type of adsorbent and efficiency of the regeneration cycle. In this work, a model describing CO2 mixture flow, mass and heat transfer with multi-component adsorption model are developed in Aspen Adsorption environment to compare the performance of PSA cycles with three different adsorbents (CMS 3K, zeolite 13x and silica gel). Adsorption capacity of CO2 for three adsorbents was found to be in the order of CMS>zeolite>silica gel. Hence, CMS was chosen as the adsorbents to evaluate PSA performances on different feed flowrate and pressure based on the purity, recovery and productivity of the CO2 separation. The result shows that, within a certain range, higher adsorption pressure will increase all purity, recovery and productivity of CO2 while higher feeding rate leads to increase recovery but lower purity and productivity.