Figures 7-9 show the effects of the air mass flow rate, the inlet temperature of air and the air humidity on mass ratio in the adsorption process. In overall, there is a clear trend of increasing of mass ratio with time. This result is the normal characteristic of the desiccant. However, as shown in figures 7-9, the increasing rate of mass ratio tends to decrease time more than 120-150 min. This condition reveals that the desiccant is nearly saturated with moisture.