Solvation force and adsorption isotherm of a fluid mixture in nanopores of complex geometry based on fundamental measure theory.

Autor: Ha QD; University of Lorraine, CNRS, LEMTA, F-54000 Nancy, France., Le TD; University of Lorraine, CNRS, LEMTA, F-54000 Nancy, France., Panfilov I; University of Lorraine, CNRS, LEMTA, F-54000 Nancy, France., Moyne C; University of Lorraine, CNRS, LEMTA, F-54000 Nancy, France.
Jazyk: angličtina
Zdroj: Journal of physics. Condensed matter : an Institute of Physics journal [J Phys Condens Matter] 2021 Jun 29; Vol. 33 (33). Date of Electronic Publication: 2021 Jun 29.
DOI: 10.1088/1361-648X/ac0ab5
Abstrakt: A novel method based on the fundamental measure theory is developed to calculate the solvation force and adsorption isotherm of a Lennard-Jones fluid mixture in complex geometries. Fast Fourier transform and 3D-voxel discretization are used for accurately computing the confined fluid densities in a closed pore of arbitrary geometry. Given the fluid densities, the solvation force distribution at the solid surface can be calculated using a new formulation from either mechanical or thermodynamic approach. Understanding the solvation force behavior, which depends on many factors such as pore geometry, confined density distribution, molecule size, is very important to analyze the pore deformation from a poromechanical point of view. Special attention in the numerical simulations is given to the adsorption problem of CH 4 and CO 2 gas mixture in ellipsoidal pore.
(© 2021 IOP Publishing Ltd.)
Databáze: MEDLINE