THE RELIABILITY OF DATA OBTAINED BY CONVENTIONAL STUDIES OF THE TEXTURE OF POROUS MATERIALS

The problem of the reliability of pore-size distributions as calculate d by the conventional processing of the results of capillary adsorptio n and mercury-porosimetry measurements is considered. Some features of capillary condensation in the system of interconnected voids are anal yzed. On the basis of the theoretical approach developed, numerical ex periments simulating nitrogen adsorption and desorption, as well as me rcury intrusion into a model porous material with properties given, we re performed. The isotherms and porosimetry diagrams obtained were pro cessed by conventional methods of calculating the size distributions o f independent capillaries. The size distributions calculated are compa red with the distributions of voids and pore entrances according to th eir radii for model porous systems, and reasons to account for diverge nces are analyzed. More realistic interpretations of results obtained by conventional methods are considered.