Kiselev S.B., Ely J.F.
Colorado School of Mines, US
Keywords: adsorption, crossover theory, fluids, nanopores
We present a a simplified crossover droplet (SCD) model for the excess adsorption of pure fluids at a flat solid-liquid interface in the volume and slit nano pores, which reproduces scaling behavior of the excess adsorption in the critical region, and is reduced to the classical, van der Waals-type analytical model far away from the bulk critical point. In developing this model, we used the density-functional theory (DFT) approach for the order parameter profile calculations with a generalized corresponding states model for the local free-energy density [1]. The SCD model well represents the available experimental adsorption data for Kr/graphite, C2H4/graphite, C3H8/griphite, CO2/silica, and SF6/graphite systems in the volume, slit nanopores, and CO2/silica gel system as well
Journal: TechConnect Briefs
Volume: 2, Technical Proceedings of the 2005 NSTI Nanotechnology Conference and Trade Show, Volume 2
Published: May 8, 2005
Pages: 530 - 533
Industry sector: Advanced Materials & Manufacturing
Topic: Informatics, Modeling & Simulation
ISBN: 0-9767985-1-4