examination of local density and adsorption on flat adsorbents
One of the elementary, but base modelling systems, the adsorption stratum lennard-dzhonsovskogo a fluid on a flat surface of a solid body is. We will designate through zось, perpendicular surfaces, and the beginning of co-ordinates it is compatible to the boundary surface of a solid body answering to the middle of an outside monolayer of atoms, i.e.
a plane transiting through centres of oscillation of atoms of this stratum. Effects of numerical calculations of allocations of the given local density η = πdДр6 as functions of the given co-ordinate z* = z∣dпредставлены on fig. 7-12, and adsorption isotherms - on fig. 13-16. Here d - diameter of the soft sphere approximately equal to parametre σf(Item 2.1) where a coefficient fуказывает, that the given quantity corresponds to an adsorbate see. The given surface density nsопределяется as p σ ~ where a coefficient 5 specifies that the given quantities corresponds to an adsorbent. The lateral views of density shown on fig. 7-10, and also the isotherms of adsorption presented on fig. 13, paid off with use of the potential applied earlier for molekuljarno-dinamikcheskih of calculations [132], and then and in our operation [133]. Other effects answering to concrete system "methane-graphite", are gained with use of potential of Steel [134]. In the basic driving parametre spotting character of course of process of formation of the adsorption stratum or the condensed film on a surface of a solid body, quantity of chemical potential μ, answering to steam at which condensation the viewed stratum is formed is. From tselesoobrazno to transfer to ∆μ = μ - μ = ln ss, where μ - the chemical potential of a macroscopical liquid phase coinciding with chemical potential of saturated steam, с* = c/cQ - the given activity (here the coefficient «0» answers saturated steam). In approach of ideal gas с* coincides with the relative pressure р* = p∕p0и with the given volume concentration c* = c∕c0. In case of supersaturated steam (when ∆μ> 0) balance of a stratum is impossible: there will be a "landslide" condensation, i.e. formation of a macroscopical liquid phase. When ∆μ = 0 (a saturation line) the situation becomes uncertain. Accordingly, the greatest interest represents a case, at which ∆μ
More on topic examination of local density and adsorption on flat adsorbents:
- 4.1. Examination of local density and adsorption on exterior and interior surfaces of two-dimensional spherical adsorbents
- examination of local density and adsorption in plane-parallel shchelevidnoj to a pore
- examination of local density and adsorption in a spherical pore and on a spherical particle
- Grinev Ilja Viktorovich. EXAMINATION of the ADSORPTION STRATUMS ON FLAT And CURVED SURFACES With USE of CLASSICAL METHOD FUNKTSIONALA of DENSITY. The DISSERTATION on competition of a scientific degree of the candidate of physical and mathematical sciences. Tver - 2014, 2014
- Grinev Ilja Viktorovich. EXAMINATION of the ADSORPTION STRATUMS ON FLAT And CURVED SURFACES With USE of CLASSICAL METHOD FUNKTSIONALA of DENSITY. The dissertation AUTHOR'S ABSTRACT on competition of a scientific degree of the candidate of physical and mathematical sciences. Tver - 2014, 2014
- Chapter 4. Adsorption examination on adsorbents with a spherics
- Chapter 3. The adsorption potentials for two-dimensional and three-dimensional adsorbents with flat and curvilinear geometry
- Chapter 2. A classical method funktsionala densities and its application to adsorption examination in systems with flat geometry
- various variants of the one-particle potentials for adsorbents with a flat surface
- weight densities, integral of interaction and the total of variation derivatives in case of flat kontinualnyh adsorbents
- classification of types of the adsorption stratums and theoretical approaches to their examination
- Chapter 1. Theoretical approaches to examination of structural and thermodynamic performances of the adsorption stratums
- a method funktsionala density. Electronic density, as alternayotivnyj a way of the description of quantum systems
- 4.2 Examination of a self-polarised state and local polarisation of thin films TSTS by a method of power microscopy of the piezoelectric response.
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