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

International Conference on Innovations and Prospects of Development of Mining Machinery and Electrical Engineering 2018

矿业工程;电工学

Valeev, A.A.^1 ; Morozova, E.V.^1,2

Kamyshin Technological Institute (Branch) of Volgograd State Technical University, 6a Lenina Street, Kamyshin, Volgograd Region

403874, Russia^1

Saint Petersburg Electrotechnical University LETI, Professora Popova Street 5, 197376, Russia^2

关键词: Capillary condensation;    Curvature radii;    Gas-liquid phase transitions;    Gasphase;    Internal state;    Kelvin equation;    Mesoporous silica MCM-41;    Porous medium;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/194/4/042025/pdf
DOI  :  10.1088/1755-1315/194/4/042025

来源: IOP

【 摘 要 】

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.