comsol multiphysics software

Adsorption and desorption of substances in the surface of adsorbent materials are very important in various chemical industries. In this work, at first, desorption of carbon dioxide on activated carbon fixed bed were examined, then by using of a two dimensional geometry and finite elements method with COMSOL multiphysics software the desorption phenomena were simulated numerically. By using of the proposed numerical model the effects of some effective parameters were studied theoretically. Modeling of activated carbon fixed bed was performed for two fixed and mobile phases in the bed and in stationary and time dependent regimes. Based on the reported results in this work, the mass transfer coefficient and the outlet flux of carbon dioxide from the particles of bed are effective parameters on the desorption phenomenon.