Simple Universal Kelvin Equation Valid in Critical Point Vicinity, External-Internal State Correction, and their Application in Argon Capillary Condensation in Mesoporous Silica MCM-41

Abstract

A new simple universal form of the Kelvin equation, which can be used near the gas-liquid phase transition critical point, and the correction of the pressure and density for gas phase fluid outside the porous medium are taken into account for the argon meniscus effective curvature radius calculation at the phase equilibrium in mesoporous silica MCM-41 on the basis of the capillary condensation experimental data.