An experimental study of gas-solid mass transfer at dynamic adsorption in fixed bed (H/D = 0,8 1) is presented in this paper. The distribution of adsorbate concentration in time and in the axial direction was experimentally measured. On this basis the variation of adsorption rate and mass transfer coefficient on the fixed bed height were established. Silica gel with mean diameter of grains of 3.57·10~(-3), 4.5·10~(-3), 5.65·10~(-3) m was used as adsorbent, and air at two values of moisture content (10.410~(-3), 12.2410~(-3), 15.72 kg water/ m3 air), and four values of flow rate (2.22·10~(-3), 3.33·10~(-3), 4.44·10~(-3), 5.55·10~(-3) m~3/s) was used as gas phase. Investigations were performed at atmospheric pressure and temperature of 294 K. The results obtained show how the flow rate and moisture content of air; time and size influence the profile of water concentration in silica gel, adsorption rate and mass transfer coefficient.
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'Gh. Asachi' Technical University of lasi, Faculty of Industrial Chemistry, Department of Chemical Engineering, Bd. Mangeron, No. 71 A, 700050, Iasi, Roumania;
