Adsorption

Assuming a steady-state flow field and permeable adsorent grains, the Navier-Stokes-Brinkman equations are solved to obtain the local velocities and pressures in the fixed bed of adsorbent grains. Then by an explicit time step iteration, convection, diffusion and adsorption of the adsorptive corresponding to the adsorption isotherm are computed. As result, the spatial and temporal resolved loading of the adsorbent and the adsorptive concentration in the downstream region are obtained, and thus the breakthrough curve.