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DY: Fachverband Dynamik und Statistische Physik
DY 22: Poster: Statistical Physics
DY 22.25: Poster
Mittwoch, 19. März 2025, 10:00–12:00, P3
Phase transitions in mesoporous solids with structural disorder — •Ali Alzaidi1, Georgiy Baroncha1, Dirk Enke1, Eustathius Kikkinides2, and Rustem Valiullin1 — 1Leipzig University, Leipzig, Germany — 2Aristotle University of Thessaloniki, Thessaloniki, Greece
Phase transitions within the pore spaces of structurally disordered porous solids exhibit complex behavior with many aspect remaining poorly understood. This complexity arises from cooperative effects emerging during first-order phase transitions in pore networks. Building on the microscopic mechanisms of phase transitions occurring in single pores and between neighboring pores, we propose a statistical thermodynamic model to describe phase transitions in pore networks driven by two competing mechanisms: invasion and nucleation. We solve this model for two types of statistically disordered pore networks, linear pore chains and Bethe lattices, and correlate the results with experimental data on gas-liquid and solid-liquid equilibria in disordered porous glasses.
Keywords: porous solids; phase eqiolibria; disorder; network models; pore structure