ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Percolation Models of Adsorption-Desorption Kinetics with Hysteresis

M. Šoóš and P. Rajniak

Department of Chemical and Biochemical Engineering, Faculty of Chemical and Food Technology, Slovak University of Technology, SK-812 37 Bratislava

E-mail: soos@tech.chem.ethz.ch

Received: 2 June 2001

Abstract: The problem of kinetics for adsorption/desorption of condensable vapours in porous media is studied theoretically and experimentally. A finite two-dimensional (2D) lattice model with random size distributions of spherical pore sites and cylindrical pore connections fitted to experimental equilibrium data was further improved. Mathematical models of surface diffusion and condensation/evaporation in the lattice were developed and studied theoretically during adsorption/desorption. The theoretical models correctly predict qualitative and quantitative features of the experiments for the system Vycor glass–nitrogen.

Full paper in Portable Document Format: 561a62.pdf

Chemical Papers 56 (1) 62–69 (2002)