Authenticity of Pore Size Distributions Obtained by Traditional Techniques
2nd International Symposium on Surface Chemistry, Adsorption and Chromatography
29 Jun - 3 Jul 1992
Pure and Applied Chemistry
, E-ISSN: 1365-3075
||SORPTION ISOTHERMS; PERCOLATION THEORY; CYLINDRICAL PORE; ADSORPTION; FLUIDS
Efremov Dmitrii K.
Fenelonov Vladimir B.
This work is devoted to the authenticity examination of pore size distributions which are result of some conventional interpretation techniques for independent pores. The present investigation is based on computer experiments simulating adsorption, capillary condensation, desorption, mercury intrusion and some other processes in model porous lattice made up of a large number of spheroidal-shaped voids pasted together by toroidal-shaped necks. Special attention has been paid to plausibility of simulating processes. In particular, the cooperative capillary condensation inside the group of neighbouring voids has been analyzed in terms of thermodynamics and molecular physics. The results of long-duration numerical experiments ( adsorption isotherms, mercury intrusion curves, etc.) have been processed with the help of conventional techniques calculating independent pore size distributions. Size distributions obtained this way have been compared with those generated for corresponding model porous solids, the reasons of mismatches have been also analyzed. Conclusions concerning with more reliable interpretation of results obtained by traditional techniques have been made.