Characterization of porous materials by finite concentration inverse gas chromatography

Inverse gas chromatography (IGC) is a well established tool for the measure ment of physico-chemical properties of solid materials at infinite dilution as well as for the determination of isotherms and surface heterogeneity at higher concentration. A novel combination of IGC and thermal desorption me thods allows an advanced characterization of porous materials with organic vapors. Different porous materials are investigated by a combined IGC/flash thermodesorption. The method is applied to separate the micropore contribu tion to adsorption from the mesopores and the outer surface area using the difference in the adsorption mechanism. (C) 2001 Elsevier Science B.V. All rights reserved.