Abstract
The adsorption process of methanol vapour on porous materials such as molecular sieves 3A, 4A, 5A, natural mordenite, natural clinoptilolite, activated alumina, silica gel and active carbon was investigated by using a ceramic gas sensor. The measurement of methanol vapour adsorption in the range from the initial relative vapour pressure of 0.6 to the final relative vapour pressure of below 0.35 was found to be suitable for the estimation of specific surface area of hydrophobic porous materials. The results obtained were compared with the data based on the nitrogen adsorption method.
The measurement by this method is considerably simple and reproducible so that the study of methanol vapour adsorption process and the estimation of specific surface area of hydrophobic porous materials become easy. Thus, the application of this method seems feasible for such line processes as solor heating and cooling, and solvent recovery from active carbon.
