Abstract
An experimental study on the hydrodynamics of fixed, fluidized and spouted granular bed was performed. With this aim two
commercial adsorbent materials and a composite material obtained by impregnation with a hygroscopic inorganic salt were
employed. The fluid phase consisted in dry air. The obtained results highlight the influence of grain size, material density and
roughness over pressure drop and gas velocity. Increasing grain size leads to decreasing pressure drop and increasing material
density leads to increasing pressure drop. The impregnation proved to have no significant effect on the pressure drop. Pressure
drop and gas velocity data were also calculated by means of equations available in literature, and compared with the experimental
ones.