抄録
The adsorption process of water vapour on porous materials such as molecular sieves 3A, 4A, 5A, natural mordenite, natural clinoptilolite, activated alumina and silica gel was investigated by using a humidity sensor. The measurement of water vapour adsorption in the range from the initial relative vapour pressure of 0.6 to the final relative vapour pressure of about 0.2 was found to be suitable for the estimation of specific surface area of hydrophilic porous materials. The results obtained were compared with the data taken by the nitrogen adsorption method.
The measurement by this method is considerably simple and reproducible so that the study of water vapour adsorption process and the estimation of specific surface area of hydrophilic porous materials become easy. Thus, this method seems useful to be applied on such line processes as solar heating and cooling, production process of dry air and oxygen (or nitrogen) enriched air by pressure swing adsorption.
