THERMOGRAVIMETRIC EVALUATION OF THE SPECIFIC SURFACE AREA AND TOTAL POROSITY OF MICROPOROUS CARBONS

摘要

A comparative study was carried out fbr over 20 microporous carbons using high-resolution thermogravimetry (HRTGA) and adsorption techniques. The utility of the HRTGA technique for characterization of active carbons was demonstrated by correlating the HRTGA data with adsorption measurements. The linear correlation was established between the values of the specific surface area evaluated by HRTGA for carbon samples immersed in n-butanol and n-heptane and the corresponding values obtained from argon adsorption isotherms. Analogous correlation was obtained for the total pore volumes obtained by HRTGA and adsorption techniques. It was shown for over 20 active carbons of different surface and structural properties that thermogravimetric measurements provide adequate information about sorption properties of these solids. Copyright (C) 1996 Elsevier Science Ltd [References: 8]