Various important processes rely on porous adsorbents: catalysts, adsorption separators, filters, soils. Adsorbed fluids behave very differently from those we know in the bulk. This happens in both high-porosity materials such as silica aerogels and low-porosity materials such as Vycor glass. At least 3 factors affect phase equilibrium of fluids in porous media: wetting, randomness, and confinement due to adsorbent. I shall show phase diagrams of a model called "lattice gas with quenched impurities" or "quenched-annealed binary mixture" and shall use the 3 above keywords to explain them.
This is a weekly series of informal talks given primarily by members of the soft condensed matter and statistical mechanics groups, but is also open to members of other groups and external visitors. The aim of the series is to promote discussion and learning of various topics at a level suitable to the broad background of the group. Everyone is welcome to attend..