Experiments of the adsorption cycles, which include adsorption: steam desorption, and drying/cooling, are conducted using a well instrumented pilot-scale apparatus with toluene as the sorptive. Special attention can be paid to the temperature profiles and the changes in water and toluene loading during drying since there is the possibility to take samples from inside the column. Water isotherms were gravimetrically determined and correlated with the association theory of Talu and Meunier. The mathematical description of the air drying of the packed bed with activated carbon is based on an equation system with coupled heat and mass transfer between the bed and the fluid. The first calculations show good agreement with experimental results.