Abstract
In this study, the specific heat of the water included in an adsorbent was analyzed by a differential scanning calorimeter, DSC, in the temperature range from -100°C to 50°C by direct measurement method and indirect measurement method. Zeolites with the various pore size were employed as an adsorbent and the measurement was performed with various water mass fractions to Zeolite. In this paper, the water was defined as it was composed of the adsorbed water and the free water which is not adsorbed in Zeolite. As a result, in the case that the temperature was under 0°C, the specific heat of the Zeolite adsorbing water decreased. In the case of the large amount of the water, the specific heat of Zeolite including the water became about the same specific heat of regular water. Furthermore Zeolite adsorbing the water has no phase transition. The specific heats of the adsorbed water and the free water were estimated from the above mentioned experimental values. It was found that the specific heat of the adsorbed water decreased with decreasing the temperature, and that the adsorbed water has no phase transition.
