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Percolation, depinning, and avalanches in capillary condensation of gases in disordered porous solids

M. L. Rosinberg, E. Kierlik, G. Tarjus

cond-mat.dis-nnarXiv:cond-mat/0206108

Abstract

We propose a comprehensive theoretical description of hysteresis in capillary condensation of gases in mesoporous disordered materials. Applying mean-field density functional theory to a coarse-grained lattice-gas model, we show that the morphology of the hysteresis loops is influenced by out-of-equilibrium transitions that are different on filling and on draining. In particular, desorption may be associated to a depinning process and be percolation-like without explicit pore-blocking effects.

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