| Abstract: | By using an automatic adiabatic calorimeter the heat capacity measurements in the temperature range of 220—320K for H2O/NaY zeolite adsorption system with various amounts of adsorbed water have been made. In cp-T curves obtained, there is no peak for solid-liquid phase transition of the adsorbed water. But for H2O-NaY zeolite system which consists of a saturated H2O/NaY adsorption system mixed mechanically with a certain amount of water, there are distinct peaks in their cp-T curves. The peak in the cp-T curve disappeared as soon as the mixed water in the latter system was evacuated. The facts mentioned above have been discussed from the point of view of the structure of the adsorbed layer and the pore size of zeolite. |
