AUTHENTICITY OF PORE-SIZE DISTRIBUTIONS OBTAINED BY TRADITIONAL TECHNIQUES

This work is devoted to the authenticity examination of pore size dist ributions which are result of some conventional interpretation techniq ues for independent pores. The present investigation is based on compu ter experiments simulating adsorption, capillary condensation, desorpt ion, mercury intrusion and some other processes in model porous lattic e made up of a large number of spheroidal-shaped voids pasted together by toroidal-shaped necks. Special attention has been paid to plausibi lity 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 intrus ion curves, etc.) have been processed with the help of conventional te chniques calculating independent pore size distributions. Size distrib utions obtained this way have been compared with those generated for c orresponding model porous solids, the reasons of mismatches have been also analyzed. Conclusions concerning with more reliable interpretatio n of results obtained by traditional techniques have been made.