A low mass transfer performance during adsorption can be caused by too high a flow velocity of the air current through the drying material bed. When dimensioning the adsorber, care must be taken that the flow velocity stays within the turbulence range, as laminar flow could cause inadequate dispersion through the formation of channels. Favourable flow velocities for compressed air and gases are between 5-15 m/min referred to the open cross-section.
